Generic Internal Table

Hi,
I need to develop a module that takes an infotype as input, does 'select * from <infotype table>' and writes data to a file. This module needs to be generic and should work for any infotype (even custom infotype).
For example, if input is PA0001, it should do 'Select * from PA0001'.
Any suggestions on how to do this?. Do i need to use field symbols?. Please let me know if you have any ideas.
Thanks,
Sandeep

REPORT Z_TEST.
type-pools: slis.
field-symbols: <dyn_table> type standard table,
 <dyn_wa>,
 <dyn_field>.
data: alv_fldcat type slis_t_fieldcat_alv,
 it_fldcat type lvc_t_fcat.
type-pools : abap.
data : it_details type abap_compdescr_tab,
 wa_details type abap_compdescr.
data : ref_descr type ref to cl_abap_structdescr.
data: new_table type ref to data, new_line type ref to data, wa_it_fldcat type lvc_s_fcat.
selection-screen begin of block b1 with frame title text .
parameters: p_table(30) type c.
selection-screen end of block b1.
data: test type pa0008 occurs 0.
select * from pa0008 into table test where endda = '99991231'.
Get the structure of the table.
ref_descr ?= cl_abap_typedescr=>describe_by_name( p_table ).
it_details[] = ref_descr->components[].
loop at it_details into wa_details.
clear wa_it_fldcat.
wa_it_fldcat-fieldname = wa_details-name .
wa_it_fldcat-datatype = wa_details-type_kind.
wa_it_fldcat-inttype = wa_details-type_kind.
wa_it_fldcat-intlen = wa_details-length.
wa_it_fldcat-decimals = wa_details-decimals.
append wa_it_fldcat to it_fldcat .
endloop.
Create dynamic internal table and assign to FS
call method cl_alv_table_create=>create_dynamic_table exporting
it_fieldcatalog = it_fldcat
importing
ep_table = new_table.
assign new_table->* to <dyn_table>.
Create dynamic work area and assign to FS
create data new_line like line of <dyn_table>.
assign new_line->* to <dyn_wa>.
Select Data from table.
select * into corresponding fields of table <dyn_table> from
(p_table).
*select * from
*(p_table) into corresponding fields of table <dyn_table> up to 5 rows where endda = '99991231'.
Write out data from table.
loop at <dyn_table> into <dyn_wa>.
do.
 assign component sy-index of structure <dyn_wa> to <dyn_field>.
 if sy-subrc <> 0. exit. endif.
 if sy-index = 1.
 write:/ <dyn_field>.
 else.
 write:
<dyn_field>.
 endif.
enddo.
endloop.

Similar Messages

Generic Internal Tables unassign

I am using a generic internal tables to get some data one by one. if i get it onece, how i make it to generic internal table again?
just like:
CALL METHOD cl_alv_table_create=>create_dynamic_table
 EXPORTING
 it_fieldcatalog = it_fldcat
 IMPORTING
 ep_table = em_str
 EXCEPTIONS
 generate_subpool_dir_full = 1
 OTHERS = 2.
ASSIGN em_str->* TO <fs_table>.
TRY .
 em_pyst = <fs_table>.
 CATCH cx_sy_dyn_call_illegal_type .
ENDTRY.
and i'd like to use em_pyst again, but it already has the same structure of last <fs_table>. how can i make it correct?

I am using a generic internal tables to get some data one by one. if i get it onece, how i make it to generic internal table again?
Not sure what is your point here.
First you create dyncamic table em_str . It already receives some structure which you determined in fieldcatalog. Than you have to dereference it (assign it to field symbol in order you can address it) ASSIGN em_str->* TO <fs_table> .
Finally you want to retrun this empty dynamically generated table to exporting parameter em_pyst . If this parameter is typed as any table it will take on the structure from your field symbol <fs_table> . I think for generic parameter this is the point to pass it generic TO function/method and receive it typed FROM the function.
If you clarify what exactly you want to achieve it will be easier to help you.
Regards
Marcin

Get the fieldnames of a generic internal table or work area

Hi All,
I have one generic work area which I have created in the below manner...
* ET_DATA itself is a generic table of type ANY...can have any internal table data in it.
* Create dynamic internal table
CREATE DATA lv_new_table LIKE et_data.
ASSIGN lv_new_table->* TO <fs_dyn_table>.
* Create dynamic work area and assign to fieldsymbol.
CREATE DATA lv_new_line LIKE LINE OF <fs_dyn_table>.
ASSIGN lv_new_line->* TO <fs_dyn_wa>.
Now...I need to get the field names of this dynamic internal table or work area..
I have already searched in forum...got many answers..but none them gives me the output.
Please note that I require the field names and not field position..
Awaiting your suggestions on how to get field names of this dynamic work area...

create data wa_ref like line of it_data.
assign wa_ref->* to <p_data>.
desc_table ?= cl_abap_tabledescr=>describe_by_data( it_data ).
desc_struc ?= desc_table->get_table_line_type( ).
describe field <p_data> type rtty components ncom.
This one is working in our environment without any error. it_data is an importing parameter in the signature of a method of type any table.

Import from database an internal table with generic Type : Web Dynpro ABAP

Hi everyone,
i have a requirement in which i'm asked to transfer data flow between two frameworks, from WD Component to another. The problem is that i have to transfer internal tables with generic types. i used the import/ export from database approache but in that way i get an error message saying "Object references and data references not yet supported".
Here is my code to extract a generic internal table from memory.
 DATA l_table_f4 TYPE TABLE OF REF TO data.
FIELD-SYMBOLS: <l_table_f4> TYPE STANDARD TABLE.
DATA lo_componentcontroller TYPE REF TO ig_componentcontroller .
DATA: ls_indx TYPE indx.
lo_componentcontroller = wd_this->get_componentcontroller_ctr( ).
lo_componentcontroller->fire_vh_search_action_evt( ).
ASSIGN l_table_f4 TO <l_table_f4>.
*-- Import table for Help F4
IMPORT l_table_f4 TO <l_table_f4> FROM DATABASE indx(v1) TO ls_indx ID 'table_help_f4_ID'.
The error message is desplayed when last instruction is executed " IMPORT l_table_f4...".
I saw another post facing the same problem but never solved "Generic Type for import Database".
Please can anyone help ?
Thanks & Kind regards.

hi KIan,
go:
general type
TYPE : BEGIN OF ty_itab,
 field1 TYPE ztab-field1,
 field2 TYPE ztab-field2,
*your own fields here:
 field TYPE i,
 field(30) TYPE c,
 END OF ty_itab.
work area
DATA : gw_itab TYPE ty_itab.
internal table
DATA : gt_itab TYPE TABLE OF ty_itab.
hope this helps
ec

Usage of field-symbol to internal table generically.

Hi gurus,
please tell the usage of field symbol to an internall table.
how do i use field symbol generically , so that i can use same field symbol for many different internal tables.
regards,
krishna
TABLES: EKKO.
DATA: ITAB TYPE STANDARD TABLE OF EKKO INITIAL SIZE 1.
SELECT-OPTIONS: P_EBELN FOR EKKO-EBELN OBLIGATORY.
FIELD-SYMBOLS <FS> TYPE any.
SELECT *
FROM EKKO
INTO TABLE ITAB
WHERE EBELN IN P_EBELN.
LOOP AT ITAB ASSIGNING <FS> casting ekko.
WRITE:/ <FS>-EBELN, <FS>-BUKRS, <FS>-LIFNR, <FS>-AEDAT, <FS>-EKGRP, <FS>-STATU, <FS>-SPRAS.
ENDLOOP.

How about something SIMPLE like this.
This creates a dynamic table and displays it in an editable grid.
The key to a real Generic internal table is to use the RTTI functionality to generate a field catalog of the structure you want to use as an internal table and then create a dynamic table based on the FCAT created from your structure.
For the code shown below code a simple screen ( SE51) with a custom container on it called CCONTAINER1.
Code also a standard status (SE41) with just the BACK, EXIT and CANCEL buttons on it.
You can use this type of program as a model for ANY dynamic table. Note however that you still can't include DEEP structure in your dynamic table.
With the program shown below you can edit the grid but you'll have to add your own functionality such as cell selection, double click etc etc.
All the code is showning you really is how to take any user defined structure and simply without a whole load of fuss, buld an FCAT, a DYNAMIC TABLE, Populate it and display a grid.
DO NOT EVER USE AGAIN THE OLD SLIS MODULES SUCH AS FM REUSE_ALV_etc. Go for OO either cl_gui_alv_grid or if you don't need to edit anything the new SALV class.
If you are still on 4.6 then the SALV class won't exist but the cl_gui_alv_grid class is fine.
You can see also just by changing a few lines of codeyou can display a grid of almost any structure you can think of (or populate another dynamic table).
Note also if you have an actual table defined you can also always code something like your_itab[] = <dyn_table> so you can retrieve your data easily enough via standard abap.
All you need to do is define your structure, create the fcat and populate the dynamic table.
Even if you don't want a a GRID you've got your data in a dynamic table which is what I believe you wanted in the first place. You don't have to display or use a GRID if you don't need to but I've added the code here as lots of applications need to display data in just these types of lists.
Now surprise your Boss by coding in 10 mins a program he / she thought would take you 1 week. !!!!!.
program zzz_simple_editable_grid.
* Define any structure
types: begin of s_elements,
vbeln type vapma-vbeln,
posnr type vapma-posnr,
matnr type vapma-matnr,
kunnr type vapma-kunnr,
werks type vapma-werks,
vkorg type vapma-vkorg,
vkbur type vapma-vkbur,
status type c,
end of s_elements.
* end of your structure
data lr_rtti_struc type ref to cl_abap_structdescr .
data:
 zog like line of lr_rtti_struc->components .
data:
zogt like table of zog,
wa_it_fldcat type lvc_s_fcat,
it_fldcat type lvc_t_fcat ,
dy_line type ref to data,
dy_table type ref to data.
data: dref type ref to data.
field-symbols: <fs> type any,
 <dyn_table> type standard table,
 <dyn_wa>.
data grid_container1 type ref to cl_gui_custom_container .
data grid1 type ref to cl_gui_alv_grid .
data: ok_code type sy-ucomm.
data: struct_grid_lset type lvc_s_layo.
*now I want to build a field catalog
* First get your data structure into a field symbol
create data dref type s_elements.
assign dref->* to <fs>.
lr_rtti_struc ?= cl_abap_structdescr=>describe_by_data( <fs> ).
* Now get the structure details into a table.
* table zogt[] contains the structure details
* From which we can build the field catalog
zogt[] = lr_rtti_struc->components.
loop at zogt into zog.
clear wa_it_fldcat.
wa_it_fldcat-fieldname = zog-name .
wa_it_fldcat-datatype = zog-type_kind.
wa_it_fldcat-inttype = zog-type_kind.
wa_it_fldcat-intlen = zog-length.
wa_it_fldcat-decimals = zog-decimals.
wa_it_fldcat-coltext = zog-name.
wa_it_fldcat-lowercase = 'X'.
append wa_it_fldcat to it_fldcat .
endloop.
* You can perform any modifications / additions to your field catalog
* here such as your own column names etc.
* Now using the field catalog created above we can
* build a dynamic table
* and populate it
* First build the dynamic table
* the table will contain entries for
* our structure defined at the start of the program
call method cl_alv_table_create=>create_dynamic_table
 exporting
 it_fieldcatalog = it_fldcat
 importing
 ep_table = dy_table.
assign dy_table->* to <dyn_table>.
create data dy_line like line of <dyn_table>.
assign dy_line->* to <dyn_wa>.
* Now fill our table with data
select vbeln posnr matnr kunnr werks vkorg vkbur
 up to 200 rows
 from vapma
 into corresponding fields of table <dyn_table>.
* Call the screen to display the grid
call screen 100.
* PBO module
module status_0100 output.
data: off type int4.
break-point 1.
if sy-batch = 'X'.
call method cl_gui_alv_grid=>offline
receiving
e_offline = off.
endif.
if sy-batch = 'X'.
if ( off is initial ).
 create object grid_container1
 exporting
 container_name = 'CCONTAINER1'.
 create object grid1
 exporting
 i_parent = grid_container1.
endif.
endif.
if sy-batch ne 'X'.
 if grid_container1 is initial.
 create object grid_container1
 exporting
 container_name = 'CCONTAINER1'.
endif.
 create object grid1
 exporting
 i_parent = grid_container1.
 if sy-batch ne 'X'.
 struct_grid_lset-edit = 'X'. "To enable editing in ALV
endif.
endif.
 call method grid1->set_table_for_first_display
 exporting is_layout = struct_grid_lset
 changing
 it_outtab = <dyn_table>
 it_fieldcatalog = it_fldcat.
set pf-status '001'.
set titlebar '000'.
endmodule.
* PAI module
module user_command_0100 input.
case sy-ucomm.
 when 'BACK'.
 leave program.
 when 'EXIT'.
 leave program.
 when 'RETURN'.
 leave program.
 when others.
endcase.
endmodule.
Cheers
jimbo

Uploading data from excel file to a dynamically created internal table

Hi,
I have a requirement where i have to upload data from an excel file into a database table. I would be able to determine the structure of the table only at runtime based on the user input.. so i have created an internal table dynamically.
Could you please tell me if its possible to upload data from an excel file to the dynamically created internal table using any function modules?
I thought of doing this by declaring a generic internal table of one field and then uploading the *.csv file into it and then splitting it based on "," and then assigning it to the field symbol referencing the internal table.. but my file length exceeds 132 characters and i'm only able to get data of lenght 132 char's in my internal table ( generic one).
Could anyone please show me a way around this.
Thanks in advance,
Harsha

Sure, check this out.
report zrich_0002.
type-pools: slis.
field-symbols: <dyn_table> type standard table,
 <dyn_wa>,
 <dyn_field>.
data: it_fldcat type lvc_t_fcat,
 wa_it_fldcat type lvc_s_fcat.
type-pools : abap.
data: new_table type ref to data,
 new_line type ref to data.
data: iflat type table of string.
data: xflat type string.
data: irec type table of string with header line.
data: tabix type sy-tabix.
data: file type string.
selection-screen begin of block b1 with frame title text .
parameters: p_file type rlgrap-filename default 'c:Test.csv'.
parameters: p_flds type i.
selection-screen end of block b1.
start-of-selection.
* Add X number of fields to the dynamic itab cataelog
do p_flds times.
 clear wa_it_fldcat.
 wa_it_fldcat-fieldname = sy-index.
 wa_it_fldcat-datatype = 'C'.
 wa_it_fldcat-inttype = 'C'.
 wa_it_fldcat-intlen = 10.
 append wa_it_fldcat to it_fldcat .
enddo.
* Create dynamic internal table and assign to FS
call method cl_alv_table_create=>create_dynamic_table
 exporting
 it_fieldcatalog = it_fldcat
 importing
 ep_table = new_table.
assign new_table->* to <dyn_table>.
* Create dynamic work area and assign to FS
create data new_line like line of <dyn_table>.
assign new_line->* to <dyn_wa>.
file = p_file.
call method cl_gui_frontend_services=>gui_upload
 exporting
 filename = file
 changing
 data_tab = iflat
 exceptions
 file_open_error = 1
 file_read_error = 2
 no_batch = 3
 gui_refuse_filetransfer = 4
 invalid_type = 5
 no_authority = 6
 unknown_error = 7
 bad_data_format = 8
 header_not_allowed = 9
 separator_not_allowed = 10
 header_too_long = 11
 unknown_dp_error = 12
 access_denied = 13
 dp_out_of_memory = 14
 disk_full = 15
 dp_timeout = 16
 others = 17.
loop at iflat into xflat.
 clear irec. refresh irec.
 split xflat at ',' into table irec.
 loop at irec.
 tabix = sy-tabix.
 assign component tabix of structure <dyn_wa> to <dyn_field>.
 <dyn_field> = irec.
 endloop.
 append <dyn_wa> to <dyn_table>.
endloop.
* Write out data from table.
loop at <dyn_table> into <dyn_wa>.
 do.
 assign component sy-index of structure <dyn_wa> to <dyn_field>.
 if sy-subrc <> 0.
 exit.
 endif.
 if sy-index = 1.
 write:/ <dyn_field>.
 else.
 write: <dyn_field>.
 endif.
 enddo.
endloop.
Regards,
Rich Heilman

Generic standard table type

Anybody please resolve my doubt
types tb_std_type type table of sflight.
-->this i understand as not a generic table type.'NON-UNIQUE" and DEFAULT KEYS are implicity defined .
data it_std type tb_std.-->Since i could declare an internal table of tb_std_type,i strongly belive tb_std_type is not a genric table type.
But when i try to declare another type of same table type tb_std_type ie
types tb2_type type tb_std_type.
This is giving me an error saying\
tb_std_type has a generic type.Use of this type is only possible for typing field symbols and formal parameters.
If thats true then how was i able to create a internal table out of it...
In case of sorted and hashed tables it behaves as exactly as it is defined.(Like if generic,can only be used for typing formal params.field symbold..and if non generic--internal tables declaration and normal typing is possible)
Please resolve this
*Would be great if could avoid a copy paste from std.help..because i have been through it..

Hello Teenu,
Query#1
types tb2_type type tb_std_type.
This is giving me an error saying\
tb_std_type has a generic type.Use of this type is only possible for typing field symbols and formal parameters.
Why is the table generic? An excerpt from SAP documentation clearly states that:
An internal table that has no table key or an incomplete table key is generic with respect to the table key. A table type of this nature can be used only for typing formal parameters or field symbols.
Query#2
If thats true then how was i able to create a internal table out of it...
SAP says:
A standard table type with a generic primary table key can only be specified after TYPE when DATA is used.
Source: [http://help.sap.com/abapdocu_70/en/ABAPTYPES_KEYDEF.htm|http://help.sap.com/abapdocu_70/en/ABAPTYPES_KEYDEF.htm]
BR,
Suhas

Need information about Internal Tables

Hi Every one!
I Need some information about Internal tables. Pls help be above the same.
Thanks & with Regards,
Chandra.

Hi..,

Internal tables 
Internal tables provide a means of taking data from a fixed structure and storing it in working memory in ABAP. The data is stored line by line in memory, and each line has the same structure. In ABAP, internal tables fulfill the function of arrays. Since they are dynamic data objects, they save the programmer the task of dynamic memory management in his or her programs. You should use internal tables whenever you want to process a dataset with a fixed structure within a program. A particularly important use for internal tables is for storing and formatting data from a database table within a program. They are also a good way of including very complicated data structures in an ABAP program.
Like all elements in the ABAP type concept, internal tables can exist both as data types and as data objects A data type is the abstract description of an internal table, either in a program or centrally in the ABAP Dictionary, that you use to create a concrete data object. The data type is also an attribute of an existing data object.
Internal Tables as Data Types
Internal tables and structures are the two structured data types in ABAP. The data type of an internal table is fully specified by its line type, key, and table type.
Line type
The line type of an internal table can be any data type. The data type of an internal table is normally a structure. Each component of the structure is a column in the internal table. However, the line type may also be elementary or another internal table.
Key
The key identifies table rows. There are two kinds of key for internal tables - the standard key and a user-defined key. You can specify whether the key should be UNIQUE or NON-UNIQUE. Internal tables with a unique key cannot contain duplicate entries. The uniqueness depends on the table access method.
If a table has a structured line type, its default key consists of all of its non-numerical columns that are not references or themselves internal tables. If a table has an elementary line type, the default key is the entire line. The default key of an internal table whose line type is an internal table, the default key is empty.
The user-defined key can contain any columns of the internal table that are not references or themselves internal tables. Internal tables with a user-defined key are called key tables. When you define the key, the sequence of the key fields is significant. You should remember this, for example, if you intend to sort the table according to the key.

Table type
The table type determines how ABAP will access individual table entries. Internal tables can be divided into three types:
Standard tables have an internal linear index. From a particular size upwards, the indexes of internal tables are administered as trees. In this case, the index administration overhead increases in logarithmic and not linear relation to the number of lines. The system can access records either by using the table index or the key. The response time for key access is proportional to the number of entries in the table. The key of a standard table is always non-unique. You cannot specify a unique key. This means that standard tables can always be filled very quickly, since the system does not have to check whether there are already existing entries.

Sorted tables are always saved sorted by the key. They also have an internal index. The system can access records either by using the table index or the key. The response time for key access is logarithmically proportional to the number of table entries, since the system uses a binary search. The key of a sorted table can be either unique or non-unique. When you define the table, you must specify whether the key is to be unique or not. Standard tables and sorted tables are known generically as index tables.

Hashed tables have no linear index. You can only access a hashed table using its key. The response time is independent of the number of table entries, and is constant, since the system access the table entries using a hash algorithm. The key of a hashed table must be unique. When you define the table, you must specify the key as UNIQUE.

Generic Internal Tables
Unlike other local data types in programs, you do not have to specify the data type of an internal table fully. Instead, you can specify a generic construction, that is, the key or key and line type of an internal table data type may remain unspecified. You can use generic internal tables to specify the types of field symbols and the interface parameters of procedures . You cannot use them to declare data objects.
Internal Tables as Dynamic Data Objects
Data objects that are defined either with the data type of an internal table, or directly as an internal table, are always fully defined in respect of their line type, key and access method. However, the number of lines is not fixed. Thus internal tables are dynamic data objects, since they can contain any number of lines of a particular type. The only restriction on the number of lines an internal table may contain are the limits of your system installation. The maximum memory that can be occupied by an internal table (including its internal administration) is 2 gigabytes. A more realistic figure is up to 500 megabytes. An additional restriction for hashed tables is that they may not contain more than 2 million entries. The line types of internal tables can be any ABAP data types - elementary, structured, or internal tables. The individual lines of an internal table are called table lines or table entries. Each component of a structured line is called a column in the internal table.

Choosing a Table Type
The table type (and particularly the access method) that you will use depends on how the typical internal table operations will be most frequently executed.

Standard tables
This is the most appropriate type if you are going to address the individual table entries using the index. Index access is the quickest possible access. You should fill a standard table by appending lines (ABAP APPEND statement), and read, modify and delete entries by specifying the index (INDEX option with the relevant ABAP command). The access time for a standard table increases in a linear relationship with the number of table entries. If you need key access, standard tables are particularly useful if you can fill and process the table in separate steps. For example, you could fill the table by appending entries, and then sort it. If you use the binary search option with key access, the response time is logarithmically proportional to the number of table entries.
Sorted tables
This is the most appropriate type if you need a table which is sorted as you fill it. You fill sorted tables using the INSERT statement. Entries are inserted according to the sort sequence defined through the table key. Any illegal entries are recognized as soon as you try to add them to the table. The response time for key access is logarithmically proportional to the number of table entries, since the system always uses a binary search. Sorted tables are particularly useful for partially sequential processing in a LOOP if you specify the beginning of the table key in the WHERE condition.

Hashed tables
This is the most appropriate type for any table where the main operation is key access. You cannot access a hashed table using its index. The response time for key access remains constant, regardless of the number of table entries. Like database tables, hashed tables always have a unique key. Hashed tables are useful if you want to construct and use an internal table which resembles a database table or for processing large amounts of data.
regards,
sai ramesh

Internal Table and Structures

Hi,
I am a beginer. I know how to create a structure and how to create an internal table using ABAP/4. My problem is, i don't understand where to use internal table and structure, also i find myself very confused about the explicit work areas.
Plese someone show me a program by explaining all of this clearly.

Hi
Internal tables are the core of ABAP. They are like soul of a body. For any program we use
internal tables extensively. We can use Internal tables like normal data base tables only, but the
basic difference is the memory allocated for internal tables is temporary. Once the program is
closed the memory allocated for internal tables will also be out of memory.
But while using the internal tables, there are many performance issues to be considered. i.e which
type of internal table to be used for the program..like standard internal table, hashed internal
table or sorted internal table etc..
Internal tables
Internal tables provide a means of taking data from a fixed structure and storing it in working memory in ABAP. The data is stored line by
line in memory, and each line has the same structure. In ABAP, internal tables fulfill the function of arrays. Since they are dynamic data
objects, they save the programmer the task of dynamic memory management in his or her programs. You should use internal tables
whenever you want to process a dataset with a fixed structure within a program. A particularly important use for internal tables is for
storing and formatting data from a database table within a program. They are also a good way of including very complicated data
structures in an ABAP program.
Like all elements in the ABAP type concept, internal tables can exist both as data types and as data objects A data type is the abstract
description of an internal table, either in a program or centrally in the ABAP Dictionary, that you use to create a concrete data object. The
data type is also an attribute of an existing data object.
Internal Tables as Data Types
Internal tables and structures are the two structured data types in ABAP. The data type of an internal table is fully specified by its line type,
key, and table type.
Line type
The line type of an internal table can be any data type. The data type of an internal table is normally a structure. Each component of the
structure is a column in the internal table. However, the line type may also be elementary or another internal table.
Key
The key identifies table rows. There are two kinds of key for internal tables - the standard key and a user-defined key. You can specify
whether the key should be UNIQUE or NON-UNIQUE. Internal tables with a unique key cannot contain duplicate entries. The uniqueness
depends on the table access method.
If a table has a structured line type, its default key consists of all of its non-numerical columns that are not references or themselves
internal tables. If a table has an elementary line type, the default key is the entire line. The default key of an internal table whose line type
is an internal table, the default key is empty.
The user-defined key can contain any columns of the internal table that are not references or themselves internal tables. Internal tables
with a user-defined key are called key tables. When you define the key, the sequence of the key fields is significant. You should remember
this, for example, if you intend to sort the table according to the key.
Table type
The table type determines how ABAP will access individual table entries. Internal tables can be divided into three types:
Standard tables have an internal linear index. From a particular size upwards, the indexes of internal tables are administered as trees. In
this case, the index administration overhead increases in logarithmic and not linear relation to the number of lines. The system can access
records either by using the table index or the key. The response time for key access is proportional to the number of entries in the table.
The key of a standard table is always non-unique. You cannot specify a unique key. This means that standard tables can always be filled
very quickly, since the system does not have to check whether there are already existing entries.
Sorted tables are always saved sorted by the key. They also have an internal index. The system can access records either by using the
table index or the key. The response time for key access is logarithmically proportional to the number of table entries, since the system
uses a binary search. The key of a sorted table can be either unique or non-unique. When you define the table, you must specify whether
the key is to be unique or not. Standard tables and sorted tables are known generically as index tables.
Hashed tables have no linear index. You can only access a hashed table using its key. The response time is independent of the number of
table entries, and is constant, since the system access the table entries using a hash algorithm. The key of a hashed table must be unique.
When you define the table, you must specify the key as UNIQUE.
Generic Internal Tables
Unlike other local data types in programs, you do not have to specify the data type of an internal table fully. Instead, you can specify a
generic construction, that is, the key or key and line type of an internal table data type may remain unspecified. You can use generic
internal tables to specify the types of field symbols and the interface parameters of procedures . You cannot use them to declare data
objects.
Internal Tables as Dynamic Data Objects
Data objects that are defined either with the data type of an internal table, or directly as an internal table, are always fully defined in
respect of their line type, key and access method. However, the number of lines is not fixed. Thus internal tables are dynamic data objects,
since they can contain any number of lines of a particular type. The only restriction on the number of lines an internal table may contain are
the limits of your system installation. The maximum memory that can be occupied by an internal table (including its internal administration)
is 2 gigabytes. A more realistic figure is up to 500 megabytes. An additional restriction for hashed tables is that they may not contain more
than 2 million entries. The line types of internal tables can be any ABAP data types - elementary, structured, or internal tables. The
individual lines of an internal table are called table lines or table entries. Each component of a structured line is called a column in the
internal table.
Choosing a Table Type
The table type (and particularly the access method) that you will use depends on how the typical internal table operations will be most
frequently executed.
Standard tables
This is the most appropriate type if you are going to address the individual table entries using the index. Index access is the quickest
possible access. You should fill a standard table by appending lines (ABAP APPEND statement), and read, modify and delete entries by
specifying the index (INDEX option with the relevant ABAP command). The access time for a standard table increases in a linear relationship
with the number of table entries. If you need key access, standard tables are particularly useful if you can fill and process the table in
separate steps. For example, you could fill the table by appending entries, and then sort it. If you use the binary search option with key
access, the response time is logarithmically proportional to the number of table entries.
Sorted tables
This is the most appropriate type if you need a table which is sorted as you fill it. You fill sorted tables using the INSERT statement. Entries
are inserted according to the sort sequence defined through the table key. Any illegal entries are recognized as soon as you try to add
them to the table. The response time for key access is logarithmically proportional to the number of table entries, since the system always
uses a binary search. Sorted tables are particularly useful for partially sequential processing in a LOOP if you specify the beginning of the
table key in the WHERE condition.
Hashed tables
This is the most appropriate type for any table where the main operation is key access. You cannot access a hashed table using its index.
The response time for key access remains constant, regardless of the number of table entries. Like database tables, hashed tables always
have a unique key. Hashed tables are useful if you want to construct and use an internal table which resembles a database table or for
processing large amounts of data.
Creating Internal Tables
Like other elements in the ABAP type concept, you can declare internal tables as abstract data
types in programs or in the ABAP Dictionary, and then use them to define data objects.
Alternatively, you can define them directly as data objects. When you create an internal table as a
data object, you should ensure that only the administration entry which belongs to an internal
table is declared statically. The minimum size of an internal table is 256 bytes. This is important if an
internal table occurs as a component of an aggregated data object, since even empty internal
tables within tables can lead to high memory usage. (In the next functional release, the size of the
table header for an initial table will be reduced to 8 bytes). Unlike all other ABAP data objects, you
do not have to specify the memory required for an internal table. Table rows are added to and
deleted from the table dynamically at runtime by the various statements for adding and deleting
records.
You can create internal tables in different types.
You can create standard internal table and then make it sort in side the program.
The same way you can change to hashed internal tables also.
There will be some performance issues with regard to standard internal tables/ hashed internal
tables/ sorted internal tables.
Internal table types
This section describes how to define internal tables locally in a program. You can also define internal tables globally as data types in the
ABAP Dictionary.
Like all local data types in programs , you define internal tables using the TYPES statement. If you do not refer to an existing table type
using the TYPE or LIKE addition, you can use the TYPES statement to construct a new local internal table in your program.
TYPES <t> TYPE|LIKE <tabkind> OF <linetype> [WITH <key>]
[INITIAL SIZE <n>].
After TYPE or LIKE, there is no reference to an existing data type. Instead, the type constructor occurs:
<tabkind> OF <linetype> [WITH <key>]
The type constructor defines the table type <tabkind>, the line type <linetype>, and the key <key> of the internal table <t>.
You can, if you wish, allocate an initial amount of memory to the internal table using the INITIAL SIZE addition.
Table type
You can specify the table type <tabkind> as follows:
Generic table types
INDEX TABLE
For creating a generic table type with index access.
ANY TABLE
For creating a fully-generic table type.
Data types defined using generic types can currently only be used for field symbols and for interface parameters in procedures . The generic
type INDEX TABLE includes standard tables and sorted tables. These are the two table types for which index access is allowed. You cannot
pass hashed tables to field symbols or interface parameters defined in this way. The generic type ANY TABLE can represent any table. You
can pass tables of all three types to field symbols and interface parameters defined in this way. However, these field symbols and
parameters will then only allow operations that are possible for all tables, that is, index operations are not allowed.
Fully-Specified Table Types
STANDARD TABLE or TABLE
For creating standard tables.
SORTED TABLE
For creating sorted tables.
HASHED TABLE
For creating hashed tables.
Fully-specified table types determine how the system will access the entries in the table in key operations. It uses a linear search for
standard tables, a binary search for sorted tables, and a search using a hash algorithm for hashed tables.
Line type
For the line type <linetype>, you can specify:
Any data type if you are using the TYPE addition. This can be a predefined ABAP type, a local type in the program, or a data type from the
ABAP Dictionary. If you specify any of the generic elementary types C, N, P, or X, any attributes that you fail to specify (field length, number
of decimal places) are automatically filled with the default values. You cannot specify any other generic types.
Any data object recognized within the program at that point if you are using the LIKE addition. The line type adopts the fully-specified data
type of the data object to which you refer. Except for within classes, you can still use the LIKE addition to refer to database tables and
structures in the ABAP Dictionary (for compatibility reasons).
All of the lines in the internal table have the fully-specified technical attributes of the specified data type.
Key
You can specify the key <key> of an internal table as follows:
[UNIQUE|NON-UNIQUE] KEY <col1> ... <col n>
In tables with a structured line type, all of the components <coli> belong to the key as long as they are not internal tables or references,
and do not contain internal tables or references. Key fields can be nested structures. The substructures are expanded component by
component when you access the table using the key. The system follows the sequence of the key fields.
[UNIQUE|NON-UNIQUE] KEY TABLE LINE
If a table has an elementary line type (C, D, F, I, N, P, T, X), you can define the entire line as the key. If you try this for a table whose line
type is itself a table, a syntax error occurs. If a table has a structured line type, it is possible to specify the entire line as the key. However,
you should remember that this is often not suitable.
[UNIQUE|NON-UNIQUE] DEFAULT KEY
This declares the fields of the default key as the key fields. If the table has a structured line type, the default key contains all non-numeric
columns of the internal table that are not and do not contain references or internal tables. If the table has an elementary line type, the
default key is the entire line. The default key of an internal table whose line type is an internal table, the default key is empty.
Specifying a key is optional. If you do not specify a key, the system defines a table type with an arbitrary key. You can only use this to
define the types of field symbols and the interface parameters of procedures . For exceptions, refer to Special Features of Standard Tables.
The optional additions UNIQUE or NON-UNIQUE determine whether the key is to be unique or non-unique, that is, whether the table can
accept duplicate entries. If you do not specify UNIQUE or NON-UNIQUE for the key, the table type is generic in this respect. As such, it can
only be used for specifying types. When you specify the table type simultaneously, you must note the following restrictions:
You cannot use the UNIQUE addition for standard tables. The system always generates the NON-UNIQUE addition automatically.
You must always specify the UNIQUE option when you create a hashed table.
Initial Memory Requirement
You can specify the initial amount of main memory assigned to an internal table object when you define the data type using the following
addition:
INITIAL SIZE <n>
This size does not belong to the data type of the internal table, and does not affect the type check. You can use the above addition to
reserve memory space for <n> table lines when you declare the table object.
When this initial area is full, the system makes twice as much extra space available up to a limit of 8KB. Further memory areas of 12KB each
are then allocated.
You can usually leave it to the system to work out the initial memory requirement. The first time you fill the table, little memory is used. The
space occupied, depending on the line width, is 16 <= <n> <= 100.
It only makes sense to specify a concrete value of <n> if you can specify a precise number of table entries when you create the table and
need to allocate exactly that amount of memory (exception: Appending table lines to ranked lists). This can be particularly important for
deep-structured internal tables where the inner table only has a few entries (less than 5, for example).
To avoid excessive requests for memory, large values of <n> are treated as follows: The largest possible value of <n> is 8KB divided by the
length of the line. If you specify a larger value of <n>, the system calculates a new value so that n times the line width is around 12KB.
Examples
TYPES: BEGIN OF LINE,
COLUMN1 TYPE I,
COLUMN2 TYPE I,
COLUMN3 TYPE I,
END OF LINE.
TYPES ITAB TYPE SORTED TABLE OF LINE WITH UNIQUE KEY COLUMN1.
The program defines a table type ITAB. It is a sorted table, with line type of the structure LINE and a unique key of the component
COLUMN1.
TYPES VECTOR TYPE HASHED TABLE OF I WITH UNIQUE KEY TABLE LINE.
TYPES: BEGIN OF LINE,
COLUMN1 TYPE I,
COLUMN2 TYPE I,
COLUMN3 TYPE I,
END OF LINE.
TYPES ITAB TYPE SORTED TABLE OF LINE WITH UNIQUE KEY COLUMN1.
TYPES: BEGIN OF DEEPLINE,
FIELD TYPE C,
TABLE1 TYPE VECTOR,
TABLE2 TYPE ITAB,
END OF DEEPLINE.
TYPES DEEPTABLE TYPE STANDARD TABLE OF DEEPLINE
WITH DEFAULT KEY.
The program defines a table type VECTOR with type hashed table, the elementary line type I and a unique key of the entire table line. The
second table type is the same as in the previous example. The structure DEEPLINE contains the internal table as a component. The table
type DEEPTABLE has the line type DEEPLINE. Therefore, the elements of this internal table are themselves internal tables. The key is the
default key - in this case the column FIELD. The key is non-unique, since the table is a standard table.
Internal table objects
Internal tables are dynamic variable data objects. Like all variables, you declare them using the DATA statement. You can also declare static
internal tables in procedures using the STATICS statement, and static internal tables in classes using the CLASS-DATA statement. This
description is restricted to the DATA statement. However, it applies equally to the STATICS and CLASS-DATA statements.
Reference to Declared Internal Table Types
Like all other data objects, you can declare internal table objects using the LIKE or TYPE addition of the DATA statement.
DATA <itab> TYPE <type>|LIKE <obj> [WITH HEADER LINE].
Here, the LIKE addition refers to an existing table object in the same program. The TYPE addition can refer to an internal type in the
program declared using the TYPES statement, or a table type in the ABAP Dictionary.
You must ensure that you only refer to tables that are fully typed. Referring to generic table types (ANY TABLE, INDEX TABLE) or not
specifying the key fully is not allowed (for exceptions, refer to Special Features of Standard Tables).
The optional addition WITH HEADER line declares an extra data object with the same name and line type as the internal table. This data
object is known as the header line of the internal table. You use it as a work area when working with the internal table (see Using the
Header Line as a Work Area). When you use internal tables with header lines, you must remember that the header line and the body of the
table have the same name. If you have an internal table with header line and you want to address the body of the table, you must indicate
this by placing brackets after the table name (<itab>[]). Otherwise, ABAP interprets the name as the name of the header line and not of the
body of the table. You can avoid this potential confusion by using internal tables without header lines. In particular, internal tables nested
in structures or other internal tables must not have a header line, since this can lead to ambiguous expressions.
TYPES VECTOR TYPE SORTED TABLE OF I WITH UNIQUE KEY TABLE LINE.
DATA: ITAB TYPE VECTOR,
JTAB LIKE ITAB WITH HEADER LINE.
MOVE ITAB TO JTAB. <- Syntax error!
MOVE ITAB TO JTAB[].
The table object ITAB is created with reference to the table type VECTOR. The table object JTAB has the same data type as ITAB. JTAB also
has a header line. In the first MOVE statement, JTAB addresses the header line. Since this has the data type I, and the table type of ITAB
cannot be converted into an elementary type, the MOVE statement causes a syntax error. The second MOVE statement is correct, since
both operands are table objects.
Declaring New Internal Tables
You can use the DATA statement to construct new internal tables as well as using the LIKE or TYPE addition to refer to existing types or
objects. The table type that you construct does not exist in its own right; instead, it is only an attribute of the table object. You can refer to
it using the LIKE addition, but not using TYPE. The syntax for constructing a table object in the DATA statement is similar to that for defining
a table type in the TYPES statement.
DATA <itab> TYPE|LIKE <tabkind> OF <linetype> WITH <key>
[INITIAL SIZE <n>]
[WITH HEADER LINE].
As when you define a table type , the type constructor
<tabkind> OF <linetype> WITH <key>
defines the table type <tabkind>, the line type <linekind>, and the key <key> of the internal table <itab>. Since the technical attributes of
data objects are always fully specified, the table must be fully specified in the DATA statement. You cannot create generic table types (ANY
TABLE, INDEX TABLE), only fully-typed tables (STANDARD TABLE, SORTED TABLE, HASHED TABLE). You must also specify the key and whether
it is to be unique (for exceptions, refer to Special Features of Standard Tables).
As in the TYPES statement, you can, if you wish, allocate an initial amount of memory to the internal table using the INITIAL SIZE addition.
You can create an internal table with a header line using the WITH HEADER LINE addition. The header line is created under the same
conditions as apply when you refer to an existing table type.
DATA ITAB TYPE HASHED TABLE OF SPFLI
WITH UNIQUE KEY CARRID CONNID.
The table object ITAB has the type hashed table, a line type corresponding to the flat structure SPFLI from the ABAP Dictionary, and a
unique key with the key fields CARRID and CONNID. The internal table ITAB can be regarded as an internal template for the database table
SPFLI. It is therefore particularly suitable for working with data from this database table as long as you only access it using the key.

Difference betwen the internal tables

Hai friends,
 Pls give me the types of internal tables and their differences .and its usage by example.
regrds,
Prashanth.

Internal tables
Definition
Data structure that exists only at program runtime.
An internal table is one of two structured data types in ABAP. It can contain any number of identically structured rows, with or without a header line.
The header line is similar to a structure and serves as the work area of the internal table. The data type of individual rows can be either elementary or structured.
Internal tables provide a means of taking data from a fixed structure and storing it in working memory in ABAP. The data is stored line by line in memory, and each line has the same structure. In ABAP, internal tables fulfill the function of arrays. Since they are dynamic data objects, they save the programmer the task of dynamic memory management in his or her programs. You should use internal tables whenever you want to process a dataset with a fixed structure within a program. A particularly important use for internal tables is for storing and formatting data from a database table within a program. They are also a good way of including very complicated data structures in an ABAP program.
Like all elements in the ABAP type concept, internal tables can exist both as data types and as data objects . A data type is the abstract description of an internal table, either in a program or centrally in the ABAP Dictionary, that you use to create a concrete data object. The data type is also an attribute of an existing data object.
Internal Tables as Data Types
Internal tables and structures are the two structured data types in ABAP. The data type of an internal table is fully specified by its line type, key, and table type.
Line type
The line type of an internal table can be any data type. The data type of an internal table is normally a structure. Each component of the structure is a column in the internal table. However, the line type may also be elementary or another internal table.
Key
The key identifies table rows. There are two kinds of key for internal tables - the standard key and a user-defined key. You can specify whether the key should be UNIQUE or NON-UNIQUE. Internal tables with a unique key cannot contain duplicate entries. The uniqueness depends on the table access method.
If a table has a structured line type, its default key consists of all of its non-numerical columns that are not references or themselves internal tables. If a table has an elementary line type, the default key is the entire line . The default key of an internal table whose line type is an internal table, the default key is empty.
The user-defined key can contain any columns of the internal table that are not references or themselves internal tables. Internal tables with a user-defined key are called key tables. When you define the key, the sequence of the key fields is significant. You should remember this, for example, if you intend to sort the table according to the key.
Table type
The table type determines how ABAP will access individual table entries. Internal tables can be divided into three types:
Standard tables have an internal linear index. From a particular size upwards, the indexes of internal tables are administered as trees. In this case, the index administration overhead increases in logarithmic and not linear relation to the number of lines. The system can access records either by using the table index or the key. The response time for key access is proportional to the number of entries in the table. The key of a standard table is always non-unique. You cannot specify a unique key. This means that standard tables can always be filled very quickly, since the system does not have to check whether there are already existing entries.
Sorted tables are always saved sorted by the key. They also have an internal index. The system can access records either by using the table index or the key. The response time for key access is logarithmically proportional to the number of table entries, since the system uses a binary search. The key of a sorted table can be either unique or non-unique. When you define the table, you must specify whether the key is to be unique or not. Standard tables and sorted tables are known generically as index tables.
Hashed tables have no linear index. You can only access a hashed table using its key. The response time is independent of the number of table entries, and is constant, since the system access the table entries using a hash algorithm. The key of a hashed table must be unique. When you define the table, you must specify the key as UNIQUE.
Generic Internal Tables
Unlike other local data types in programs, you do not have to specify the data type of an internal table fully. Instead, you can specify a generic construction, that is, the key or key and line type of an internal table data type may remain unspecified. You can use generic internal tables to specify the types of field symbols and the interface parameters of procedures. You cannot use them to declare data objects.
Internal Tables as Dynamic Data Objects
Data objects that are defined either with the data type of an internal table, or directly as an internal table, are always fully defined in respect of their line type, key and access method. However, the number of lines is not fixed. Thus internal tables are dynamic data objects, since they can contain any number of lines of a particular type. The only restriction on the number of lines an internal table may contain are the limits of your system installation. The maximum memory that can be occupied by an internal table (including its internal administration) is 2 gigabytes. A more realistic figure is up to 500 megabytes. An additional restriction for hashed tables is that they may not contain more than 2 million entries. The line types of internal tables can be any ABAP data types - elementary, structured, or internal tables. The individual lines of an internal table are called table lines or table entries. Each component of a structured line is called a column in the internal table.
Choosing a Table Type
The table type (and particularly the access method) that you will use depends on how the typical internal table operations will be most frequently executed.
Standard tables
This is the most appropriate type if you are going to address the individual table entries using the index. Index access is the quickest possible access. You should fill a standard table by appending lines (ABAP APPEND statement), and read, modify and delete entries by specifying the index (INDEX option with the relevant ABAP command). The access time for a standard table increases in a linear relationship with the number of table entries. If you need key access, standard tables are particularly useful if you can fill and process the table in separate steps. For example, you could fill the table by appending entries, and then sort it. If you use the binary search option with key access, the response time is logarithmically proportional to the number of table entries.
Sorted tables
This is the most appropriate type if you need a table which is sorted as you fill it. You fill sorted tables using the INSERT statement. Entries are inserted according to the sort sequence defined through the table key. Any illegal entries are recognized as soon as you try to add them to the table. The response time for key access is logarithmically proportional to the number of table entries, since the system always uses a binary search. Sorted tables are particularly useful for partially sequential processing in a LOOP if you specify the beginning of the table key in the WHERE condition.
Hashed tables
This is the most appropriate type for any table where the main operation is key access. You cannot access a hashed table using its index. The response time for key access remains constant, regardless of the number of table entries. Like database tables, hashed tables always have a unique key. Hashed tables are useful if you want to construct and use an internal table which resembles a database table or for processing large amounts of data.
Special Features of Standard Tables
Unlike sorted tables, hashed tables, and key access to internal tables, which were only introduced in Release 4.0, standard tables already existed several releases previously. Defining a line type, table type, and tables without a header line have only been possible since Release 3.0. For this reason, there are certain features of standard tables that still exist for compatibility reasons.
Standard Tables Before Release 3.0
Before Release 3.0, internal tables all had header lines and a flat-structured line type. There were no independent table types. You could only create a table object using the OCCURS addition in the DATA statement, followed by a declaration of a flat structure:
DATA: BEGIN OF .
The effect of the OCCURS addition is to construct a standard table with the data type
They can also be replaced by the following statements:
Standard Tables From Release 4.0
When you create a standard table, you can use the following forms of the TYPES and DATA statements. The addition INITIAL SIZE is also possible in all of the statements. The addition WITH HEADER LINE is possible in the DATA statement.
Standard Table Types
Generic Standard Table Type:
TYPES TYPE|LIKE TABLE OF TYPE|LIKE TABLE OF
 WITH TYPE|LIKE TABLE OF TYPE|LIKE TABLE OF TYPE|LIKE TABLE OF
 WITH .
Here, the LIKE addition refers to an existing table object in the same program. The TYPE addition can refer to an internal type in the program declared using the TYPES statement, or a table type in the ABAP Dictionary.
You must ensure that you only refer to tables that are fully typed. Referring to generic table types (ANY TABLE, INDEX TABLE) or not specifying the key fully is not allowed (for exceptions, refer to Special Features of Standard Tables).
The optional addition WITH HEADER line declares an extra data object with the same name and line type as the internal table. This data object is known as the header line of the internal table. You use it as a work area when working with the internal table (see Using the Header Line as a Work Area). When you use internal tables with header lines, you must remember that the header line and the body of the table have the same name. If you have an internal table with header line and you want to address the body of the table, you must indicate this by placing brackets after the table name ([]). Otherwise, ABAP interprets the name as the name of the header line and not of the body of the table. You can avoid this potential confusion by using internal tables without header lines. In particular, internal tables nested in structures or other internal tables must not have a header line, since this can lead to ambiguous expressions.
 TYPES VECTOR TYPE SORTED TABLE OF I WITH UNIQUE KEY TABLE LINE.
DATA: ITAB TYPE VECTOR,
 JTAB LIKE ITAB WITH HEADER LINE.
MOVE ITAB TO JTAB. <- Syntax error!
MOVE ITAB TO JTAB[].
The table object ITAB is created with reference to the table type VECTOR. The table object JTAB has the same data type as ITAB. JTAB also has a header line. In the first MOVE statement, JTAB addresses the header line. Since this has the data type I, and the table type of ITAB cannot be converted into an elementary type, the MOVE statement causes a syntax error. The second MOVE statement is correct, since both operands are table objects.
Declaring New Internal Tables
You can use the DATA statement to construct new internal tables as well as using the LIKE or TYPE addition to refer to existing types or objects. The table type that you construct does not exist in its own right; instead, it is only an attribute of the table object. You can refer to it using the LIKE addition, but not using TYPE. The syntax for constructing a table object in the DATA statement is similar to that for defining a table type in the TYPES statement.
DATA ]
As when you define a table type, the type constructor
of an internal table as follows:
UNIQUE KEY belong to the key as long as they are not internal tables or references, and do not contain internal tables or references. Key fields can be nested structures. The substructures are expanded component by component when you access the table using the key. The system follows the sequence of the key fields.
UNIQUE KEY TABLE LINE
If a table has an elementary line type (C, D, F, I, N, P, T, X), you can define the entire line as the key. If you try this for a table whose line type is itself a table, a syntax error occurs. If a table has a structured line type, it is possible to specify the entire line as the key. However, you should remember that this is often not suitable.
UNIQUE DEFAULT KEY
This declares the fields of the default key as the key fields. If the table has a structured line type, the default key contains all non-numeric columns of the internal table that are not and do not contain references or internal tables. If the table has an elementary line type, the default key is the entire line. The default key of an internal table whose line type is an internal table, the default key is empty.
Specifying a key is optional. If you do not specify a key, the system defines a table type with an arbitrary key. You can only use this to define the types of field symbols and the interface parameters of procedures. For exceptions, refer to Special Features of Standard Tables.
The optional additions UNIQUE or NON-UNIQUE determine whether the key is to be unique or non-unique, that is, whether the table can accept duplicate entries. If you do not specify UNIQUE or NON-UNIQUE for the key, the table type is generic in this respect. As such, it can only be used for specifying types. When you specify the table type simultaneously, you must note the following restrictions:
· You cannot use the UNIQUE addition for standard tables. The system always generates the NON-UNIQUE addition automatically.
· You must always specify the UNIQUE option when you create a hashed table.
Initial Memory Requirement
You can specify the initial amount of main memory assigned to an internal table object when you define the data type using the following addition:
INITIAL SIZE , the system calculates a new value so that n times the line width is around 12KB.
Examples
TYPES: BEGIN OF LINE,
COLUMN1 TYPE I,
COLUMN2 TYPE I,
COLUMN3 TYPE I,
END OF LINE.
1. TYPES ITAB TYPE SORTED TABLE OF LINE WITH UNIQUE KEY COLUMN1.
The program defines a table type ITAB. It is a sorted table, with line type of the structure LINE and a unique key of the component COLUMN1.
2. TYPES VECTOR TYPE HASHED TABLE OF I WITH UNIQUE KEY TABLE LINE.
TYPES: BEGIN OF LINE,
COLUMN1 TYPE I,
COLUMN2 TYPE I,
COLUMN3 TYPE I,
END OF LINE.
TYPES ITAB TYPE SORTED TABLE OF LINE WITH UNIQUE KEY COLUMN1.
TYPES: BEGIN OF DEEPLINE,
FIELD TYPE C,
TABLE1 TYPE VECTOR,
TABLE2 TYPE ITAB,
END OF DEEPLINE.
TYPES DEEPTABLE TYPE STANDARD TABLE OF DEEPLINE
WITH DEFAULT KEY.
The program defines a table type VECTOR with type hashed table, the elementary line type I and a unique key of the entire table line. The second table type is the same as in the previous example. The structure DEEPLINE contains the internal table as a component. The table type DEEPTABLE has the line type DEEPLINE. Therefore, the elements of this internal table are themselves internal tables. The key is the default key - in this case the column FIELD. The key is non-unique, since the table is a standard table.
Specifying the Type of Formal Parameters
Formal parameters can have any valid ABAP data type. You can specify the type of a formal parameter, either generically or fully, using the TYPE or LIKE addition. If you specify a generic type, the type of the formal parameter is either partially specified or not specified at all. Any attributes that are not specified are inherited from the corresponding actual parameter when the subroutine is called. If you specify the type fully, all of the technical attributes of the formal parameter are defined with the subroutine definition.
The following remarks about specifying the types of parameters also apply to the parameters of other procedures (function modules and methods).
If you have specified the type of the formal parameters, the system checks that the corresponding actual parameters are compatible when the subroutine is called. For internal subroutines, the system checks this in the syntax check. For external subroutines, the check cannot occur until runtime.
By specifying the type, you ensure that a subroutine always works with the correct data type. Generic formal parameters allow a large degree of freedom when you call subroutines, since you can pass data of any type. This restricts accordingly the options for processing data in the subroutine, since the operations must be valid for all data types. For example, assigning one data object to another may not even be possible for all data types. If you specify the types of subroutine parameters, you can perform a much wider range of operations, since only the data appropriate to those operations can be passed in the call. If you want to process structured data objects component by component in a subroutine, you must specify the type of the parameter.
Specifying Generic Types
The following types allow you more freedom when using actual parameters. The actual parameter need only have the selection of attributes possessed by the formal parameter. The formal parameter adopts its remaining unnamed attributes from the actual parameter.
 Check for actual parameters
No type specificationTYPE ANY The subroutine accepts actual parameters of any type. The formal parameter inherits all of the technical attributes of the actual parameter.
TYPE C, N, P, or X The subroutine only accepts actual parameters with the type C, N, P, or X. The formal parameter inherits the field length and DECIMALS specification (for type P) from the actual parameter.
TYPE TABLE The system checks whether the actual parameter is a standard internal table. This is a shortened form of TYPE STANDARD TABLE (see below).
TYPE ANY TABLE The system checks whether the actual parameter is an internal table. The formal parameter inherits all of the attributes (line type, table type, key) from the actual parameter.
TYPE INDEX TABLE The system checks whether the actual parameter is an index table (standard or sorted table). The formal parameter inherits all of the attributes (line type, table type, key) from the actual parameter.
TYPE STANDARD TABLE The system checks whether the actual parameter is a standard internal table. The formal parameter inherits all of the attributes (line type, key) from the actual parameter.
TYPE SORTED TABLE The system checks whether the actual parameter is a sorted table. The formal parameter inherits all of the attributes (line type, key) from the actual parameter.
TYPE HASHED TABLE The system checks whether the actual parameter is a hashed table. The formal parameter inherits all of the attributes (line type, key) from the actual parameter.
Note that formal parameters inherit the attributes of their corresponding actual parameters dynamically at runtime, and so they cannot be identified in the program code. For example, you cannot address an inherited table key statically in a subroutine, but you probably can dynamically.
TYPES: BEGIN OF LINE,
 COL1,
 COL2,
 END OF LINE.
DATA: WA TYPE LINE,
 ITAB TYPE HASHED TABLE OF LINE WITH UNIQUE KEY COL1,
 KEY(4) VALUE 'COL1'.
WA-COL1 = 'X'. INSERT WA INTO TABLE ITAB.
WA-COL1 = 'Y'. INSERT WA INTO TABLE ITAB.
PERFORM DEMO USING ITAB.
FORM DEMO USING P TYPE ANY TABLE.
READ TABLE P WITH TABLE KEY (KEY) = 'X' INTO WA.
ENDFORM.
The table key is addressed dynamically in the subroutine. However, the static address
READ TABLE P WITH TABLE KEY COL1 = 'X' INTO WA.
is syntactically incorrect, since the formal parameter P does not adopt the key of table ITAB until runtime.
Assigning Internal Tables :
Like other data objects, you can use internal tables as operands in a MOVE statement
MOVE , including the data in any nested internal tables. The original contents of the target table are overwritten.
If you are using internal tables with header lines, remember that the header line and the body of the table have the same name. If you want to address the body of the table in an assignment, you must place two brackets () after the table name.
DATA: BEGIN OF line,
 col1(1) TYPE c,
 col2(1) TYPE c,
 END OF line.
DATA: etab LIKE TABLE OF line WITH HEADER LINE,
 ftab LIKE TABLE OF line.
line-col1 = 'A'. line-col2 = 'B'.
APPEND line TO etab.
MOVE etab[] TO ftab.
LOOP AT ftab INTO line.
WRITE: / line-col1, line-col2.
ENDLOOP.
The output is:
A B
The example creates two standard tables ETAB and FTAB with the line type of the structure LINE. ETAB has a header line. After filling ETAB line by line using the APPEND statement, its entire contents are assigned to FTAB. Note the brackets in the statement.
DATA: ftab TYPE SORTED TABLE OF f
 WITH NON-UNIQUE KEY table_line,
 itab TYPE HASHED TABLE OF i
 WITH UNIQUE KEY table_line,
 fl TYPE f.
DO 3 TIMES.
INSERT sy-index INTO TABLE itab.
ENDDO.
ftab = itab.
LOOP AT ftab INTO fl.
WRITE: / fl.
ENDLOOP.
The output is:
1.000000000000000E+00
2.000000000000000E+00
3.000000000000000E+00
FTAB is a sorted table with line type F and a non-unique key. ITAB is a hashed table with line type I and a unique key. The line types, and therefore the entire tables, are convertible. It is therefore possible to assign the contents of ITAB to FTAB. When you assign the unsorted table ITAB to the sorted table FTAB, the contents are automatically sorted by the key of FTAB.
In Unicode systems, the following conversion is not allowed:
DATA: BEGIN OF iline,
 num TYPE i,
 END OF iline,
 BEGIN OF fline,
 num TYPE f,
 END OF fline,
 itab LIKE TABLE OF iline,
 ftab LIKE TABLE OF fline.
DO 3 TIMES.
iline-num = sy-index.
APPEND iline-num TO itab.
ENDDO.
ftab = itab.
loop AT ftab INTO fline.
WRITE: / fline-num.
ENDLOOP.
In a non-Unicode system, the output may look something like this:
 6.03823403895813E-154
 6.03969074613219E-154
 6.04114745330626E-154
Here, the line types of the internal tables ITAB and FTAB are structures each with one component of type I or F. The line types are convertible, but not compatible. Therefore, when assigning ITAB to FTAB, the contents of Table ITAB are converted to type C fields and then written to FTAB. The system interprets the transferred data as type F fields, so that the results are meaningless. In Unicode systems, you are not allowed to convert numeric fields to fields of type C.
Initializing Internal Tables
Like all data objects, you can initialize internal tables with the
CLEAR .
statement. This statement restores an internal table to the state it was in immediately after you declared it. This means that the table contains no lines. However, the memory already occupied by the memory up until you cleared it remains allocated to the table.
If you are using internal tables with header lines, remember that the header line and the body of the table have the same name. If you want to address the body of the table in a comparison, you must place two brackets () after the table name.
CLEAR , LT, <).
If you are using internal tables with header lines, remember that the header line and the body of the table have the same name. If you want to address the body of the table in a comparison, you must place two brackets () after the table name.
The first criterion for comparing internal tables is the number of lines they contain. The more lines an internal table contains, the larger it is. If two internal tables contain the same number of lines, they are compared line by line, component by component. If components of the table lines are themselves internal tables, they are compared recursively. If you are testing internal tables for anything other than equality, the comparison stops when it reaches the first pair of components that are unequal, and returns the corresponding result.
DATA: BEGIN OF LINE,
COL1 TYPE I,
COL2 TYPE I,
END OF LINE.
DATA: ITAB LIKE TABLE OF LINE,
 JTAB LIKE TABLE OF LINE.
DO 3 TIMES.
LINE-COL1 = SY-INDEX.
LINE-COL2 = SY-INDEX ** 2.
APPEND LINE TO ITAB.
ENDDO.
MOVE ITAB TO JTAB.
LINE-COL1 = 10. LINE-COL2 = 20.
APPEND LINE TO ITAB.
IF ITAB GT JTAB.
WRITE / 'ITAB GT JTAB'.
ENDIF.
APPEND LINE TO JTAB.
IF ITAB EQ JTAB.
WRITE / 'ITAB EQ JTAB'.
ENDIF.
LINE-COL1 = 30. LINE-COL2 = 80.
APPEND LINE TO ITAB.
IF JTAB LE ITAB.
WRITE / 'JTAB LE ITAB'.
ENDIF.
LINE-COL1 = 50. LINE-COL2 = 60.
APPEND LINE TO JTAB.
IF ITAB NE JTAB.
WRITE / 'ITAB NE JTAB'.
ENDIF.
IF ITAB LT JTAB.
WRITE / 'ITAB LT JTAB'.
ENDIF.
The output is:
ITAB GT JTAB
ITAB EQ JTAB
JTAB LE ITAB
ITAB NE JTAB
ITAB LT JTAB
This example creates two standard tables, ITAB and JTAB. ITAB is filled with 3 lines and copied to JTAB. Then, another line is appended to ITAB and the first logical expression tests whether ITAB is greater than JTAB. After appending the same line to JTAB, the second logical expression tests whether both tables are equal. Then, another line is appended to ITAB and the third logical expressions tests whether JTAB is less than or equal to ITAB. Next, another line is appended to JTAB. Its contents are unequal to the contents of the last line of ITAB. The next logical expressions test whether ITAB is not equal to JTAB. The first table field whose contents are different in ITAB and JTAB is COL1 in the last line of the table: 30 in ITAB and 50 in JTAB. Therefore, in the last logical expression, ITAB is less than JTAB.
Sorting Internal Tables
You can sort a standard or hashed table in a program. To sort a table by its key, use the statement
SORT ASCENDING .
The statement sorts the internal table ASCENDING
 BY ASCENDING
 ASCENDING .
The table is now sorted by the specified components : T for standard table, S for sorted table, and H for hashed table.
DATA: BEGIN OF LINE,
 COL1 TYPE I,
 COL2 TYPE I,
 END OF LINE.
DATA ITAB LIKE HASHED TABLE OF LINE WITH UNIQUE KEY COL1
 INITIAL SIZE 10.
DATA: LIN TYPE I,
 INI TYPE I,
 KND TYPE C.
DESCRIBE TABLE ITAB LINES LIN OCCURS INI KIND KND.
WRITE: / LIN, INI, KND.
DO 1000 TIMES.
LINE-COL1 = SY-INDEX.
LINE-COL2 = SY-INDEX ** 2.
INSERT LINE INTO TABLE ITAB.
ENDDO.
DESCRIBE TABLE ITAB LINES LIN OCCURS INI KIND KND.
WRITE: / LIN, INI, KND.
The output is:
 0 10 H
 1,000 10 H
Here, a hashed table ITAB is created and filled. The DESCRIBE TABLE statement is processed before and after the table is filled. The current number of lines changes, but the number of initial lines cannot change.
INSERT LINE INTO TABLE ITAB.
LINE-TEXT = 'Moller'.
CONVERT TEXT LINE-TEXT INTO SORTABLE CODE LINE-XTEXT.
INSERT LINE INTO TABLE ITAB.
LINE-TEXT = 'Miller'.
CONVERT TEXT LINE-TEXT INTO SORTABLE CODE LINE-XTEXT.
INSERT LINE INTO TABLE ITAB.
SORT ITAB.
PERFORM LOOP_AT_ITAB.
SORT ITAB BY XTEXT.
PERFORM LOOP_AT_ITAB.
SORT ITAB AS TEXT.
PERFORM LOOP_AT_ITAB.
FORM LOOP_AT_ITAB.
LOOP AT ITAB INTO LINE.
 WRITE / LINE-TEXT.
ENDLOOP.
SKIP.
ENDFORM.
This example demonstrates alphabetical sorting of character fields. The internal table ITAB contains a column with character fields and a column with corresponding binary codes that are alphabetically sortable. The binary codes are created with the CONVERT statement (see Converting to a Sortable Format). The table is sorted three times. First, it is sorted binarily by the TEXT field. Second, it is sorted binarily by the XTEXT field. Third, it is sorted alphabetically by the TEXT field. Since there is no directly corresponding case in English, we have taken the results from a German text environment:
Miller
Moller
Muller
Möller
Miller
Moller
Möller
Muller
Miller
Moller
Möller
Muller
After the first sorting, 'Möller' follows behind 'Muller' since the internal code for the letter 'ö' comes after the code for 'u'. The other two sorts are alphabetical
The binary sort by XTEXT has the same result as the alphabetical sorting by the field TEXT.
Regards,
Amit
Reward all helpful replies.

Tutorials on Internal Tables.

Hi,
I am new to ABAP and this site. I need some one's help to know about Internal Tables and it's concept.
Can any one provide me Tutorials on this ?
Answers will be appreciated.
Thanks,
Shyam

Internal Tables
Internal tables provide a means of taking data from a fixed structure and storing it in working memory in ABAP. The data is stored line by line in memory, and each line has the same structure. In ABAP, internal tables fulfill the function of arrays. Since they are dynamic data objects, they save the programmer the task of dynamic memory management in his or her programs. You should use internal tables whenever you want to process a dataset with a fixed structure within a program. A particularly important use for internal tables is for storing and formatting data from a database table within a program. They are also a good way of including very complicated data structures in an ABAP program.
Data Type of an Internal Table
The data type of an internal table is fully specified by its line type, key, and table type.
Line Type
The line type of an internal table can be any data type. The data type of an internal table is normally a structure. Each component of the structure is a column in the internal table. However, the line type may also be elementary or another internal table.
Key
The key identifies table rows. There are two kinds of key for internal tables - the standard key and a user-defined key. You can specify whether the key should be UNIQUE or NON-UNIQUE. Internal tables with a unique key cannot contain duplicate entries. The uniqueness depends on the table access method.
At tables with structured row type, the standard key is formed from all character-type columns of the internal table. If a table has an elementary line type, the default key is the entire line. The default key of an internal table whose line type is an internal table, the default key is empty. At tables with non-structured row type, the standard key consists of the entire row. If the row type is also a table, an empty key is defined.
The user-defined key can contain any columns of the internal table that are no internal table themselves, and do not contain internal tables. References are allowed as table keys. Internal tables with a user-defined key are called key tables. When you define the key, the sequence of the key fields is significant. You should remember this, for example, if you intend to sort the table according to the key.
Table type
The table type determines how ABAP will access individual table entries. Internal tables can be divided into three types:
Standard tables have an internal linear index. From a particular size upwards, the indexes of internal tables are administered as trees. In this case, the index administration overhead increases in logarithmic and not linear relation to the number of lines. The system can access records either by using the table index or the key. The response time for key access is proportional to the number of entries in the table. The key of a standard table is always non-unique. You cannot specify a unique key. This means that standard tables can always be filled very quickly, since the system does not have to check whether there are already existing entries.
Sorted tables are always saved sorted by the key. They also have an internal index. The system can access records either by using the table index or the key. The response time for key access is logarithmically proportional to the number of table entries, since the system uses a binary search. The key of a sorted table can be either unique or non-unique. When you define the table, you must specify whether the key is to be UNIQUE or NON-UNIQUE. Standard tables and sorted tables are known generically as index tables.
Hashed tables have no linear index. You can only access a hashed table using its key. The response time is independent of the number of table entries, and is constant, since the system access the table entries using a hash algorithm. The key of a hashed table must be unique. When you define the table, you must specify the key as UNIQUE.
Generic Internal Tables
Unlike other local data types in programs, you do not have to specify the data type of an internal table fully. Instead, you can specify a generic construction, that is, the key or key and line type of an internal table data type may remain unspecified. You can use generic internal tables to specify the types of field symbols and the interface parameters of procedures . You cannot use them to declare data objects.
Internal Tables as Dynamic Data Objects
Internal tables are always completely specified regarding row type, key and access type. However, the number of lines is not fixed. Thus internal tables are dynamic data objects, since they can contain any number of lines of a particular type. The only restriction on the number of lines an internal table may contain are the limits of your system installation. The maximum memory that can be occupied by an internal table (including its internal administration) is 2 gigabytes. A more realistic figure is up to 500 megabytes. An additional restriction for hashed tables is that they may not contain more than 2 million entries. The line types of internal tables can be any ABAP data types - elementary, structured, or internal tables. The individual lines of an internal table are called table lines or table entries. Each component of a structured line is called a column in the internal table.
Choosing a Table Type
The table type (and particularly the access method) that you will use depends on how the typical internal table operations will be most frequently executed.
Standard tables
This is the most appropriate type if you are going to address the individual table entries using the index. Index access is the quickest possible access. You should fill a standard table by appending lines (ABAP APPENDstatement), and read, modify and delete entries by specifying the index (INDEX option with the relevant ABAP command). The access time for a standard table increases in a linear relationship with the number of table entries. If you need key access, standard tables are particularly useful if you can fill and process the table in separate steps. For example, you could fill the table by appending entries, and then sort it. If you use the binary search option (BINARY) with key access, the response time is logarithmically proportional to the number of table entries.
Sorted tables
This is the most appropriate type if you need a table which is sorted as you fill it. You fill sorted tables using the INSERTstatement. Entries are inserted according to the sort sequence defined through the table key. Any illegal entries are recognized as soon as you try to add them to the table. The response time for key access is logarithmically proportional to the number of table entries, since the system always uses a binary search. Sorted tables are particularly useful for partially sequential processing in a LOOP if you specify the beginning of the table key in the WHEREcondition.
Hashed tables
This is the most appropriate type for any table where the main operation is key access. You cannot access a hashed table using its index. The response time for key access remains constant, regardless of the number of table entries. Like database tables, hashed tables always have a unique key. Hashed tables are useful if you want to construct and use an internal table which resembles a database table or for processing large amounts of data.
Creating Internal Tables
Processing Internal Tables

Making processing on an internal table generic

Hi,
I'm trying to make more generic a processing on an internal table.
Here's the idea :
"DELETE FROM TABLE T_VBAP every lines that do not exist IN table T_VBAK USING column VBELN for comparison"
You can see below the (not generic) version of this function.
I'd like to make it more generic.
It would be called this way :
 PERFORM reduire USING t_vbak t_vbap 'VBELN' 'vbak-vbeln'.
with the following code.
Here is my question :
How can I make the last statement generic too ?
DELETE <table_travail> WHERE (column) NOT IN <fs_tab> won't work...
Thanks a lot !
Jessie
Non-generic version :
FORM reduire.
DATA : liste_vbeln type range of vbak-vbeln,
 line_vbeln TYPE LINE OF liste_vbeln,
 lt_vbak TYPE TABLE OF ts_vbak,
 lt_vbap TYPE ts_vbak.
lt_vbak = t_vbak.
SORT lt_vbak BY vbeln.
DELETE ADJACENT DUPLICATES FROM lt_vbak COMPARGIN vbeln.
line_vbeln-sign = 'I'.
line_vbeln-option = 'EQ'.
LOOP AT lt_vbak INTO ls_vbak.
 line_vbeln-low = ls_vbak-vbeln.
 APPEND line_vbeln TO liste_vbeln.
ENDLOOP.
IF liste_vbeln IS INITIAL.
 CLEAR t_vbap.
ELSE.
 DELETE t_vbap WHERE vbeln NOT IN liste_vbeln.
ENDIF.
ENDFORM.
Generic version :
FORM reduire USING p_reference STANDARD TABLE
 p_travail TYPE STANDARD TABLE
 column TYPE lvc_name
 column_type TYPE string.
 FIELD-SYMBOLS <table_reference> TYPE STANDARD TABLE.
 FIELD-SYMBOLS <table_reference_copy> TYPE STANDARD TABLE.
 ASSIGN p_reference to <table_reference>.
 FIELD-SYMBOLS <table_travail> TYPE STANDARD TABLE.
 ASSIGN p_travail to <table_travail>.
 FIELD-SYMBOLS <table_reference_fields> TYPE ANY.
 DATA gs_fldname TYPE REF TO DATA.
 CREATE DATA gs_fldname LIKE LINE OF <table_reference>.
 ASSIGN gs_fldname->* TO <table_reference_fields>.
 DATA position TYPE i.
 DATA dyn_table TYPE REF TO DATA.
 DATA wa_fieldcat TYPE lvc_s_fcat.
 DATA it_fieldcat TYPE lvc_t_fcat.
 DATA table_reference_copy_pre TYPE REF TO DATA.
 DATA l_descr_ref TYPE REF TO cl_abap_structdescr.
 FIELD-SYMBOLS <ls_tab> TYPE ANY.
 FIELD-SYMBOLS <field> TYPE ANY.
 FIELD-SYMBOLS <lfs_comp_wa> TYPE abap_compdescr.
 l_descr_ref ?= cl_abap_typedescr=>describe_by_data( <table_reference_fields> ).
 LOOP AT l_descr_ref->components[] ASSIGNING <lfs_comp_wa>.
 IF <lfs_comp_wa>-name = column.
 position = sy-tabix.
 ENDIF.
 CLEAR wa_fieldcat.
 wa_fieldcat-fieldname = <lfs_comp_wa>-name.
 wa_fieldcat-datatype = <lfs_comp_wa>-type_kind.
 wa_fieldcat-inttype = <lfs_comp_wa>-type_kind.
 wa_fieldcat-intlen = <lfs_comp_wa>-length / 2.
 wa_fieldcat-decimals = <lfs_comp_wa>-decimals.
 APPEND wa_fieldcat TO it_fieldcat.
 ENDLOOP.
 CALL METHOD cl_alv_table_create=>create_dynamic_table
 EXPORTING
 it_fieldcatalog = it_fieldcat
 IMPORTING
 ep_table = table_reference_copy_pre.
 ASSIGN table_reference_copy_pre->* TO <table_reference_copy>.
 <table_reference_copy> = p_reference.
 SORT <table_reference_copy> BY (column).
 DELETE ADJACENT DUPLICATES FROM <table_reference> COMPARING (column).
 DATA :
 gr_structdescr TYPE REF TO cl_abap_structdescr,
 gr_tabledescr TYPE REF TO cl_abap_tabledescr,
 gr_datadescr TYPE REF TO cl_abap_datadescr,
 gr_typedescr TYPE REF TO cl_abap_typedescr,
 gt_components TYPE abap_component_tab,
 gw_component TYPE LINE OF abap_component_tab,
 gr_wa TYPE REF TO DATA,
 gr_tab TYPE REF TO DATA.
 FIELD-SYMBOLS :
 <fs_wa> TYPE ANY,
 <fs_tab> TYPE TABLE.
 MOVE 'SIGN' to gw_component-name.
 gw_component-type ?= cl_abap_elemdescr=>get_c( p_length = 1 ).
 INSERT gw_component INTO TABLE gt_components.
 MOVE 'OPTION' to gw_component-name.
 gw_component-type ?= cl_abap_elemdescr=>get_c( p_length = 2 ).
 INSERT gw_component INTO TABLE gt_components.
 MOVE 'LOW' to gw_component-name.
 gw_component-type ?= cl_abap_elemdescr=>describe_by_name( column_type ).
 INSERT gw_component INTO TABLE gt_components.
 MOVE 'HIGH' to gw_component-name.
 gw_component-type ?= cl_abap_elemdescr=>describe_by_name( column_type ).
 INSERT gw_component INTO TABLE gt_components.
 gr_structdescr ?= cl_abap_structdescr=>create( gt_components ).
 CREATE DATA gr_wa TYPE HANDLE gr_structdescr.
 ASSIGN gr_wa->* to <fs_wa>.
 gr_datadescr ?= gr_structdescr.
 gr_tabledescr ?= cl_abap_tabledescr=>create( gr_datadescr ).
 CREATE DATA gr_tab TYPE HANDLE gr_datadescr.
 ASSIGN gr_tab->* TO <fs_tab>.
 LOOP AT <table_reference> ASSIGNING <ls_tab>.
 ASSIGN COMPONENT position OF STRUCTURE <ls_tab> to <field>.
 CONCATENATE 'IEQ' <field> INTO <fs_wa>.
 APPEND <fs_wa> TO <fs_tab>.
 ENDLOOP.
 DELETE t_vbap WHERE vbeln NOT IN <fs_tab>.
ENDFORM.

Hello Jessie,
Which ABAP Release are you working on? Dynamic WHERE conditions for LOOP AT itab, MODIFY itab, and DELETE itab statements are possible from Release 702.
Even if you're on 702, the statement DELETE <table_travail> WHERE (column) NOT IN <fs_tab> won't work! You need to change your coding to:
DATA lv_dyn_cond TYPE string.
CONCATENATE column `NOT IN` `<FS_TAB>` INTO lv_dyn_cond SEPARATED BY space.
DELETE <table_travail> WHERE (lv_dyn_cond).
BR,
Suhas

R/3 Looking for generic RFC to post internal table as CSV to SAP XI/PI

Hi everybody,
does anybody know a RFC to send a internal table to XI/PI?
Thanks
Regards Mario

> do you really know all RFC to claim there is no such RFC?
I appriciate this question.
Well at least I don't know all RFCs. But one thing I know if you are populating your data in your internal table by using some select query then you have to create your own ZRFC because for that there is no standard RFC.
So this was the reason I said there is no such RFC. If you know some RFC then please let me know to add in my knowledge database.
Regards,
Sarvesh

Importing internal table from one program to another program

Hi everybody,
i have one small doubt.
i am using submit statement and passing the values from this program to another program selection screen. in that program logic is written.In that program one internal table values are being exported to the memory id of that program. now i have to import that internal table values into my program by using import statement. i am using the following syntax
import itab from menory id 'program name'.
but i am getting an error saying program name is unknown.
what is the exat syntax for this .
thanking you,
giri.

hi,
check these statements.
IMPORT - Get data
Variants:
1. IMPORT obj1 ... objn FROM DATA BUFFER f.
2. IMPORT obj1 ... objn FROM INTERNAL TABLE itab.
2. IMPORT obj1 ... objn FROM MEMORY.
3. IMPORT obj1 ... objn FROM SHARED MEMORY itab(ar) ID key.
4. IMPORT obj1 ... objn FROM SHARED BUFFER itab(ar) ID key.
5. IMPORT obj1 ... objn FROM DATABASE dbtab(ar) ID key.
6. IMPORT obj1 ... objn FROM DATASET dsn(ar) ID key.
7. IMPORT obj1 ... objn FROM LOGFILE ID key.
8. IMPORT DIRECTORY INTO itab FROM DATABASE dbtab(ar) ID key.
9. IMPORT (itab) FROM ... .
In some cases, the syntax rules that apply to Unicode programs are different than those for non-Unicode programs. For more details, see Storing Cluster Tables.
Variant 1
IMPORT obj1 ... objn FROM DATA BUFFER f.
Extras:
1. ... = f (for each object to be imported)
2. ... TO f (for each object to be imported)
3. ... ACCEPTING PADDING
4. ... ACCEPTING TRUNCATION
5. ... IGNORING STRUCTURE BOUNDARIES
6. ... IGNORING CONVERSION ERRORS
7. ... REPLACEMENT CHARACTER c
8. ... IN CHAR-TO-HEX MODE
9. ... CODE PAGE INTO f1
10. ... ENDIAN INTO f2
The syntax check performed in an ABAP Objects context is stricter than in other ABAP areas.
See You Cannot Use Implicit Field Names in Clusters.
Effect
Imports the data objects obj1 ... objn from the data buffer declared. The data buffer must be of type XSTRING . The data objects obj1 ... objn can be fields, structures, complex structures, or tables. The system imports all the data that has been stored in the data buffer f using the EXPORT ... TO DATA BUFFER statement and is listed here. It also checks that the structure used in the IMPORT statement matches the one in the EXPORT statement.
The Return Code is set as follows:
SY-SUBRC = 0:
The existing data objects in the data cluster specified were imported. The rest remain unchanged. (In some circumstances, this may mean that no data objects were imported).
SY-SUBRC = 4:
The data objects could not be imported. The contents of all the objects remain unchanged.
Addition 1
... = f (for each object to be imported)
Addition 2
... TO f (for each object to be imported)
Effect
The object is stored in the field f.
Addition 3
... ACCEPTING PADDING
Effect
This addition allows you to append new fields to the end
of structures, sub-structures, and internal tables. The IMPORT statement fills the additional fields with initial values; make existing fields (C, N, X, P, I1, and I2) longer; map character-type fields to STRING-type fields; or to map byte-type fields to XSTRING-type fields.
Addition 4
... ACCEPTING TRUNCATION
Effect
This addition allows you to shorten the last CHAR
fields, or to omit the last component at the top level. (Until Release 4.6, you could do this without using an addition).
Addition 5
... IGNORING STRUCTURE BOUNDARIES
Effect
This addition means that only the fragment sequence is
relevant - that is, that any sub-structures match. If you use this addition, the system ignores any alignment changes necessitated by Unicode - such as inserting named includes.
You cannot use this addition with either addition 3 (enlarge structure) or addition 4 (shorten structure), since it specifies that structure and include boundaries are to be ignored.
From Release 6.10 onwards, the include information is stored in datasets, so that the system can also check that includes match - that is, that sub-structures and includes (named or unnamed) are treated equally. When data is imported in a Release prior to 6.10, includes are not checked.
Addition 6
...IGNORING CONVERSION ERRORS
Effect
This addition prevents the system from triggering a
runtime error, if an error occurs when the character set is converted. '#' is used as a replacement character.
Addition 7
... REPLACEMENT CHARACTER c
Effect
The replacement character is used if a particular
character cannot be converted when the character set is converted.
This addition can only be used in conjunction with addition 6.
Addition 8
... IN CHAR-TO-HEX MODE
Effect
Not all character-type fields are converted. To convert
a field, you must create a field (or structure) that is identical to the exported field or structure, except that all its character-type components must be replaced with hexadecimal fields.
You can only use this addition in Unicode programs, to allow you to import camouflaged binary data as single-byte characters.
Moreover, you cannot use this addition in conjunction with the additions 3, 4, 5, 6, or 7.
Addition 9
... CODE PAGE INTO f1
Effect
The code page of the exported data is stored in the
character-type field f1 - for example, to analyze data that has been imported with the IN CHAR-TO-HEX MODE addition.
Addition 10
... ENDIAN INTO f2
Effect
The byte order (LITTLE or BIG) of the
exported data is stored in the field f2 - for example, to analyze data that has been imported with the IN CHAR-TO-HEX MODE addition. The field f2 must have the type ABAP_ENDIAN, which is defined in the type group ABAP. For this reason, the type group ABAP must be included in the ABAP program using a TYPE-POOLS statement.
Variant 2
IMPORT obj1 ... objn FROM INTERNAL TABLE itab.
Extras:
1. ... = f (for each object to be imported)
2. ... TO f (for each object to be imported)
3. ... ACCEPTING PADDING
4. ... ACCEPTING TRUNCATION
5. ... IGNORING STRUCTURE BOUNDARIES
6. ... IGNORING CONVERSION ERRORS
7. ... REPLACEMENT CHARACTER c
8. ... IN CHAR-TO-HEX MODE
9. ... CODE PAGE INTO f1
10. ... ENDIAN INTO f2
The syntax check performed in an ABAP Objects context is stricter than in other ABAP areas. See No implicit field names in cluster.
Effect
Imports the data objects obj1 ... objn (fields, structures, complex structures, or tables) from the specified internal table itab. The first column in the internal table must be of the predefined type INT2 and the second must be type X. To define the first column you must refer to a data element in the ABAP Dictionary that has the predefined type INT2.
All data that was stored in the internal table itab using EXPORT ... TO INTERNAL TABLE and listed, is imported. The system checks that the EXPORT and IMPORT structures match.
The Return Code is set as follows:
SY-SUBRC = 0:
The existing data objects in the specified data cluster were imported, the rest remain unchanged (it is possible that no data object was imported).
SY-SUBRC = 4:
The data objects could not be imported.
The contents of all listed objects remain unchanged
Addition 1
... = f (for each object to be imported)
Addition 2
... TO f (for each object to be imported)
Effect
Places the object in the field f.
Addition 3
... ACCEPTING PADDING
Effect
This addition allows you to add new fields to the ends
of structures, even to substructures and internal tables (the additional fields are filled with initial value during the IMPORT). It also allows you to increase the size of existing fields (C, N, X, P, I1, and I2) and to map Char fields to STRING type fields or byte fields to XSTRING type fields.
Addition 4
... ACCEPTING TRUNCATION
Effect
This addition allows you to shorten the last CHAR
field or omit the last component on the highest level (till Release 4.6 this was possible without specifying an addition).
Addition 5
... IGNORING STRUCTURE BOUNDARIES
Effect
This addition means that only the page order is
relevant, that is any substructures match. With this addition, the system also ignores alignment changes arising from the Unicode conversion (for example, due to subsequent insertion of named includes).
This addition rules out any subsequent structural enhancements (addition 3) or structural shortening (addition 4) because with this addition it is the structural limits and include limits that are to be ignored.
As from Release 6.10, the include information will also be stored in the dataset, so that it is possible to also check whether the includes match, that is substructures and includes (named or unnamed) are treated the same. When importing data that was exported in a Release lower than 6.10, the includes are not checked.
Addition 6
...IGNORING CONVERSION ERRORS
Effect
This addition has the effect that an error in the
character set conversion does not cause a runtime error. The system uses "#" as a replacement character.
Addition 7
... REPLACEMENT CHARACTER c
Effect
The system uses the specified replacement character if a
character cannot be converted during a character set conversion. If this addition is not specified, the system uses "#" as a replacement character.
This addition can only be used in conjunction with addition 6.
Addition 8
... IN CHAR-TO-HEX MODE
Effect
No character type fields are converted. For this you
must create a field or structure that is identical to the exported field or exported structure, except that all character type fields must be replaced with hexadecimal fields.
This addition, which is only allowed in programs with a set Unicode flag, allows you to import binary data disguised as single byte characters. This addition cannot be used in conjunction with additions 3, 4, 5, 6, and 7.
Addition 9
... CODE PAGE INTO f1
Effect
The codepage of the exported data is stored in the
character-type field f1 (for example, to be able to analyze the data imported with the addition IN CHAR-TO-HEX MODE).
Addition 10
... ENDIAN INTO f2
Effect
The byte order (LITTLE or BIG) of the
exported data is stored in the field f2 (for example, to be able analyze the data imported using the addition IN CHAR-TO-HEX MODE). The field f2 must be of type ABAP_ENDIAN, defined in type group ABAP. You must therefore include the type group ABAP in the ABAP program with a TYPE-POOLS statement.
Variant 3
IMPORT obj1 ... objn FROM MEMORY.
Extras:
1. ... = f (for each object to be imported) 2. ... TO f (for each object to be imported)
3. ... ID key
4. ... ACCEPTING PADDING
5. ... ACCEPTING TRUNCATION
6. ... IGNORING STRUCTURE BOUNDARIES
The syntax check performed in an ABAP Objects context is stricter than in other ABAP areas. See You Must Enter Identification and Cannot Use Implicit Field Names inClusters
Effect
Imports data objects obj1 ... objn (fields, structures, complex structures or tables) from a data cluster in the ABAP memory (see EXPORT). Reads in all data without an ID that was exported to memory with "EXPORT ... TO MEMORY.". In contrast to the variant IMPORT FROM DATABASE, it does not check that the structure matches in EXPORT and IMPORT.
The Return Code is set as follows:
SY-SUBRC = 0:
The existing data objects in the data cluster specified were imported. The rest remain unchanged (in some circumstances, this may mean that no data objects were imported).
SY-SUBRC = 4:
The data objects could not be imported, probably because the ABAP memory was empty.
The contents of all objects remain unchanged.
Note
You should always use the addition 3 (... ID key) with the statement. Otherwise, the effect of the variant is not certain (EXPORT statements in different parts of a program overwrite each other in the ABAP memory), since it exists only for reasons of compatibility with R/2.
Additional methods for selecting and deleting data clusters in the ABAP memory are provided by the system class CL_ABAP_EXPIMP_MEM.
Please consult Data Area and Modularization Unit Organization documentation as well.
Addition 1
... = f (for each object to be imported)
Addition 2
... TO f (for each object to be imported)
Effect
The object is placed in field f.
Addition 3
... ID key
Effect
Imports only data stored in ABAP memory under the ID key.
Notes
The key, key, must be a character-type data object (but not a string).
The Return Code is set as follows:
SY-SUBRC = 0:
The existing data objects in the data cluster specified were imported. The rest remain unchanged (in some circumstances, this may mean that no data objects were imported).
SY-SUBRC = 4:
The data objects could not be imported, probably because an incorrect ID was used.
The contents of all objects remain unchanged.
Addition 4
... ACCEPTING PADDING
Effect
This addition allows you to append new fields to the end of structures, sub-structures, and internal tables. The IMPORT statement fills the additional fields with initial values; make existing fields (C, N, X, P, I1, and I2) longer; map character-type fields to STRING-type fields; or to map byte-type fields to XSTRING-type fields.
Addition 5
... ACCEPTING TRUNCATION
Effect
This addition allows you to shorten the last CHAR field, or to omit the last component at the top level. (Until Release 4.6, you could do this without using an addition).
Addition 6
... IGNORING STRUCTURE BOUNDARIES
Effect
This addition means that only the fragment sequence is relevant - that is, that any sub-structures match. If you use this addition, the system ignores any alignment changes necessitated by Unicode - such as inserting named includes.
You cannot use this addition with either addition 3 (enlarge structure) or addition 4 (shorten structure), since it specifies that structure and include boundaries are to be ignored.
From Release 6.10 onwards, the include information is stored in datasets, so that the system can also check that includes match - that is, that sub-structures and includes (named or unnamed) are treated equally. When data is imported in a Release prior to 6.10, includes are not checked.
Related
EXPORT TO MEMORY, DELETE FROM MEMORY, FREE MEMORY
Variant 4
IMPORT obj1 ... objn FROM SHARED MEMORY itab(ar) ID key.
Extras:
1. ... = f (for each object to be exported) 2. ... TO f (for each object to be exported)
3. ... CLIENT g (before ID key)
4. ... TO wa (after itab(ar) or ID key )
5. ... ACCEPTING PADDING
6. ... ACCEPTING TRUNCATION
7. ... IGNORING STRUCTURE BOUNDARIES
The syntax check performed in an ABAP Objects context is stricter than in other ABAP areas.
See You Cannot Use Implicit Field Names in Clusters and You Cannot Use Table Work Areas.
Effect
Imports the data objects obj1 ... objn (fields, structures, complex structures, or tables) from shared memory. The data objects are read using the ID key from the area ar in the table itab - c.f. EXPORT TO SHARED MEMORY). You must use itab to specify a database table although the system reads from a memory table with the appropriate structure.
The Return Code is set as follows:
SY-SUBRC = 0:
The existing data objects in the data cluster specified were imported. The rest remain unchanged. (In some circumstances, this may mean that no data objects were imported).
SY-SUBRC = 4:
The data objects could not be imported. You may have used the wrong ID. The contents of all the objects remain unchanged.
Notes
The table dbtab named according to SHARED MEMORY must be declared using TABLES (except in addition 2).
The structure of fields (field symbols and internal tables) to be imported must match the structure of the objects exported in the dataset. The objects must be imported under the same names as those under which they were exported. Otherwise, they will not be imported.
The key length consists of: the client (3 digits, but only if tab is client-specific); area (2 characters); ID; and line number (4 bytes). It must not exceed 64 bytes - that is, the ID must not be longer than 55 characters, if the table is client- specific.
The key, key, must be a character-type data object (but not a string).
Additional methods for selecting and deleting data clusters in the shared memory are provided by the system class CL_ABAP_EXPIMP_SHMEM.
Please consult Data Area and Modularization Unit Organization documentation as well.
Addition 1
... = f (for each object to be imported)
Addition 2
... TO f (for each object to be imported)
Effect
The object is stored in the field f.
Addition 3
... CLIENT g (before ID key)
Effect
The data is imported from client g (provided the import/export table is tab client-specific). The client, g must be a character-type data object (but not a string).
Addition 4
... TO wa (after itab(ar) or ID key)
Effect
You need to use this addition if user data fields have been stored in the application buffer and are to be read from there. The work area wa is used instead of the table work area. The target area must correspond to the structure of the called table tab.
Addition 5
... ACCEPTING PADDING
Effect
This addition allows you to: append new fields to the end of structures, sub-structures, and internal tables. The IMPORT statement fills the additional fields with initial values; make existing fields (C, N, X, P, I1, and I2) longer; map character-type fields to STRING-type fields; or to map byte-type fields to XSTRING-type fields.
Addition 6
... ACCEPTING TRUNCATION
Effect
This addition allows you to shorten the last CHAR fields, or to omit the last component at the top level. (Until Release 4.6, you could do this without using an addition).
Addition 7
... IGNORING STRUCTURE BOUNDARIES
Effect
This addition means that only the fragment sequence is relevant - that is, that any sub-structures match. If you use this addition, the system ignores any alignment changes necessitated by Unicode - such as inserting named includes.
You cannot use this addition with either addition 4 (enlarge structure) or addition 5 (shorten structure), since it specifies that structure and include boundaries are to be ignored.
From Release 6.10 onwards, the include information is stored in datasets, so that the system can also check that includes match - that is, that sub-structures and includes (named or unnamed) are treated equally. When data is imported in a Release prior to 6.10, includes are not checked.
Related
EXPORT TO SHARED MEMORY, DELETE FROM SHARED MEMORY
Variant 5
IMPORT obj1 ... objn FROM SHARED BUFFER itab(ar) ID key.
Extras:
1. ... = f (for each object to be exported) 2. ... TO f (for each object to be exported)
3. ... CLIENT g (before ID key)
4. ... TO wa (last addition or after itab(ar))
The syntax check performed in an ABAP Objects context is stricter than in other ABAP areas.
See Cannot Use Implicit Fieldnames in Clusters und Cannot Use Table Work Areas.
Effect
Imports data objects obj1 ... objn (fields or
tables) from the cross-transaction application buffer. The data objects are read in the application buffer using the ID key of the area ar of the buffer area for the table itab (see EXPORT TO SHARED BUFFER). You must use dbtab to specify a database table although the system reads from a memory table with an appropriate structure.
The Return Code is set as follows:
SY-SUBRC = 0:
The existing data objects in the data cluster specified were imported. The rest remain unchanged (in some circumstances, this means that no data objects were imported).
SY-SUBRC = 4:
The data objects could not be imported, probably because an incorrect ID was used.
The contents of all objects remain unchanged.
Example
Import two fields and an internal table from the application buffer with the structure INDX:
TYPES: BEGIN OF ITAB3_LINE,
 CONT(4),
 END OF ITAB3_LINE.
DATA: INDXKEY LIKE INDX-SRTFD VALUE 'KEYVALUE',
 F1(4),
 F2(8) TYPE P DECIMALS 0,
 ITAB3 TYPE STANDARD TABLE OF ITAB3_LINE,
 INDX_WA TYPE INDX.
Import data.
IMPORT F1 = F1 F2 = F2 ITAB3 = ITAB3
 FROM SHARED BUFFER INDX(ST) ID INDXKEY TO INDX_WA.
After import, the data fields INDX-AEDAT and
INDX-USERA in front of CLUSTR are filled with
the values in the fields before the EXPORT
statement.
Notes
You must declare the table dbtab, named after DATABASE using a TABLES statement.
The structure of the fields, structures, and internal tables to be imported must match the structure of the objects exported to the dataset. Moreover, the objects must be imported with the same name used to export them. Otherwise, the import is not performed.
The maximum total key length is 64 bytes. It must include: a client if the table is client-specific (3 characters); an area (2 characters); identification; and line counter (4 bytes). This means that the number of characters available for the identification of a client-specific table is 55 characters.
The key, key, must be a character-type data object (but not a string).
Additional methods for selecting and deleting data clusters in the cross-transaction application buffer are provided by the system class CL_ABAP_EXPIMP_SHBUF.
Please consult Data Area and Modularization Unit Organization documentation as well.
Addition 1
... = f (for each object to be imported)
Addition 2
... TO f (for each object to be imported)
Effect
The object is placed in the field f
Addition 3
... CLIENT g (after dbtab(ar))
Effect
Takes the data from the client g (if the import/export table dbtab is client-specific). The client g must be a character-type data object (but not a string).
Addition 4
... TO wa (as the last addition or after itab(ar))
Effect
You need to use this addition if you want to save user data fields in the application buffer and then read them from there later. The system uses a work area wa instead of a table work area. The target area must have the same structure as the table tab.
Example
DATA: INDX_WA TYPE INDX,
 F1.
IMPORT F1 = F1 FROM SHARED BUFFER INDX(AR)
 CLIENT '001' ID 'TEST'
 TO INDX_WA.
WRITE: / 'AEDAT:', INDX_WA-AEDAT,
 / 'USERA:', INDX_WA-USERA,
 / 'PGMID:', INDX_WA-PGMID.
Variant 6
IMPORT obj1 ... objn FROM DATABASE dbtab(ar) ID key.
Extras:
1. ... = f (for each object to be imported)
2. ... TO f (for each object to be imported)
3. ... CLIENT g (before ID key )
4. ... USING form
5. ... TO wa (last addition or after dbtab(ar))
6. ... MAJOR-ID id1 (instead of ID key)
7. ... MINOR-ID id2 (with MAJOR-ID id1 )
8. ... ACCEPTING PADDING
9. ... ACCEPTING TRUNCATION
10. ... IGNORING STRUCTURE BOUNDARIES
11. ... IGNORING CONVERSION ERRORS
12. ... REPLACEMENT CHARACTER c
13. ... IN CHAR-TO-HEX MODE
14. ... CODE PAGE INTO f1
15. ... ENDIAN INTO f2
The syntax check performed in an ABAP Objects context is stricter than in other ABAP areas. See Cannot Use Implicit Fieldnames in Clusters and Cannot Use Table Work Areas.
Effect
Imports data objects obj1 ... objn (fields, structures, complex structures, or tables) from the data cluster with ID key in area ar of the database table dbtab (see EXPORT TO DATABASE).
The Return Code is set as follows:
SY-SUBRC = 0:
The existing data objects in the data cluster specified were imported. The rest remain unchanged (in some circumstances, this may mean that not data objects were imported).
SY-SUBRC = 4:
The data objects could not be imported, probably because an incorrect ID was used.
The contents of all objects remain unchanged.
Example
Import two fields and an internal table:
TYPES: BEGIN OF TAB3_TYPE,
 CONT(4),
 END OF TAB3_TYPE.
DATA: INDXKEY LIKE INDX-SRTFD,
 F1(4), F2 TYPE P,
 TAB3 TYPE STANDARD TABLE OF TAB3_TYPE WITH
 NON-UNIQUE DEFAULT KEY,
 WA_INDX TYPE INDX.
INDXKEY = 'INDXKEY'.
IMPORT F1 = F1
 F2 = F2
 TAB3 = TAB3 FROM DATABASE INDX(ST) ID INDXKEY
 TO WA_INDX.
Notes
You must declare the table dbtab, named after DATABASE, using the TABLES statement (except in addition 5).
The structure of fields, field strings and internal tables to be imported must match the structure of the objects exported to the dataset. In addition, the objects must be imported under the same name used to export them. If this is not the case, either a runtime error occurs or no import takes place.
Exception: You can lengthen or shorten the last field if it is of type CHAR, or add/omit CHAR fields at the end of the structure.
The key, key, must be a character-type data object (but not a string).
Additional methods for selecting and deleting data clusters in the database table specified are provided by the system class CL_ABAP_EXPIMP_DB.
Addition 1
... = f (for each object to be imported)
Addition 2
... TO f (for each object to be imported)
Effect
The object is placed in field f.
Addition 3
... CLIENT g (before the ID key)
Effect
Data is taken from the client g (in client-specific import/export databases only). Client g must be a character-type data object (but not a string).
Example
DATA: F1,
 WA_INDX TYPE INDX.
IMPORT F1 = F1 FROM DATABASE INDX(AR) CLIENT '002' ID 'TEST'
 TO WA_INDX.
Addition 4
... USING form
Note
This statement is for internal use only.
Incompatible changes or further developments may occur at any time without warning or notice.
Effect
Does not read the data from the database. Instead, calls the FORM routine form for each record read from the database without this addition. This routine can take the data key of the data to be retrieved from the database table work area and write the retrieved data to this work area. The name of the routine has the format <name of database table>_<name of form>; it has one parameter which describes the operation (READ, UPDATE or INSERT). The routine must set the field SY-SUBRC in order to show whether the function was successfully performed.
Addition 5
... TO wa (after key or after dbtab(ar))
Effect
You need to use this addition if you want to save user data fields in the cluster database and then read from there. The system uses the work area wa instead of a table work area. The target area entered must have the same structure as the table dbtab.
Example
DATA WA LIKE INDX.
DATA F1.
IMPORT F1 = F1 FROM DATABASE INDX(AR)
 CLIENT '002' ID 'TEST'
 TO WA.
WRITE: / 'AEDAT:', WA-AEDAT,
 / 'USERA:', WA-USERA,
 / 'PGMID:', WA-PGMID.
Addition 6
... MAJOR-ID id1 (instead of the ID key).
Addition 7
... MINOR-ID id2 (with MAJOR-ID id1)
This addition is not allowed in an ABAP Objects context. See Cannot Use Generic Identification.
Effect
Searches for a record the first part of whose ID (length of id1) matches id1 and whose second part - if MINOR-ID id2 is also declared - is greater than or equal to id2.
Addition 8
... ACCEPTING PADDING
Effect
This addition allows you to append new fields to the end of structures, sub-structures, and internal tables. The IMPORT statement fills the additional fields with initial values; make existing fields (C, N, X, P, I1, and I2) longer; map character-type fields to STRING-type fields; or to map byte-type fields to XSTRING-type fields.
Addition 9
... ACCEPTING TRUNCATION
Effect
This addition allows you to shorten the last CHAR fields, or to omit the last component at the top level. (Until Release 4.6, you could do this without using an addition).
Addition 10
... IGNORING STRUCTURE BOUNDARIES
Effect
This addition means that only the fragment sequence is relevant - that is, that any sub-structures match. If you use this addition, the system ignores any alignment changes necessitated by Unicode - such as inserting named includes.
You cannot use this addition with either addition 8 (enlarge structure) or addition 9 (shorten structure), since it specifies that structure and include boundaries are to be ignored.
From Release 6.10 onwards, the include information is stored in datasets, so that the system can also check that includes match - that is, that sub-structures and includes (named or unnamed) are treated equally. When data is imported in a Release prior to 6.10, includes are not checked.
Addition 11
...IGNORING CONVERSION ERRORS
Effect
This addition prevents the system from triggering a runtime error, if an error occurs when the character set is converted. '#' is used as a replacement character.
Addition 12
... REPLACEMENT CHARACTER c
Effect
The replacement character is used if a particular character cannot be converted when the character set is converted. If you do not use this addition, '#' is used as a replacement character.
This addition can only be used in conjunction with addition 11.
Addition 13
... IN CHAR-TO-HEX MODE
Effect
All character-type fields are not converted. To convert a field, you must create a field (or structure) that is identical to the exported field or structure, except that all its character-type components must be replaced with hexadecimal fields.
You can only use this addition in Unicode programs, to allow you to import camouflaged binary data as single-byte characters. Moreover, you cannot use this addition in conjunction with the additions 8, 9, 10, 11, and 12.
Addition 14
... CODE PAGE INTO f1
Effect
The code page of the exported data is stored in the character-type field f1 - for example, to analyze data that has been imported with the IN CHAR-TO-HEX MODE addition.
Addition 15
... ENDIAN INTO f2
Effect
The byte order(LITTLE or BIG) of the exported data is stored in the field f2 - for example, to analyze data that has been imported with the IN CHAR-TO-HEX MODE addition. The field f2 must have the type ABAP_ENDIAN, which is defined in the type group ABAP. For this reason, the type group ABAP must be included in the ABAP program using a TYPE-POOLS statement.
Variant 7
IMPORT obj1 ... objn FROM DATASET dsn(ar) ID key.
This variant is not allowed in an ABAP Objects context. See Cannot Use Clusters in Files
Note
This variant is no longer supported and cannot be used.
Variant 8
IMPORT obj1 ... objn FROM LOGFILE ID key.
Note
This statement is for internal use only.
Incompatible changes or further developments may occur at any time without warning or notice.
Extras:
1. ... = f (for each field f to be imported) 2. ... TO f (for each field f to be imported)
The syntax check performed in an ABAP Objects context is stricter than in other ABAP areas. See Cannot Use Implicit Field Names in Clusters
Effect
Imports data objects (fields, field strings or internal tables) from the update data. You must specify the update key assigned by the system (with current request number) as the key.
The key, key, must be a character-type data object (but not a string).
The Return Code is set as follows:
SY-SUBRC = 0:
The existing data objects in the data cluster specified were imported. The rest remain unchanged (in some circumstances, this may mean that no data objects were imported).
SY-SUBRC = 4:
The data objects could not be imported. An incorrect ID may have been used.
The contents of all objects remain unchanged.
Addition 1
... = f (for each object to be imported)
Addition 2
... TO f (for each object to be imported)
Effect
The object is placed in field f.
Variant 9
IMPORT DIRECTORY INTO itab FROM DATABASE dbtab(ar) ID key.
Extras:
1. ... CLIENT g (after dbtab(ar)) 2. ... TO wa (last addition or after dbtab(ar))
The syntax check performed in an ABAP Objects context is stricter than in other ABAP areas. See Cannot Use Table Work Areas.
Effect
Imports an object directory stored under the specified ID with EXPORT TO DATABASE into the table itab. The internal table itab may not have the type HASHED TABLE or ANY TABLE.
The key, key, must be a character-type data object (but not a string).
The Return Code is set as follows:
SY-SUBRC = 0:
The directory was successfully imported.
SY-SUBRC = 4:
The directory could not be imported, probably because an incorrect ID was used.
The internal table itab must have the same structure as the Dictionary structure CDIR (INCLUDE STRUCTURE).
Addition 1
... CLIENT g (before ID key)
Effect
Takes data from the client g (only with client-specific import/export databases). Client g must be a character-type data object (but not a string).
Addition 2
... TO wa (last addition or after dbtab(ar))
Effect
Uses the work area wa instead of the table work area. When you use this addition, you do not need to declare the table dbtab, named after DATABASE using a TABLES statement. The work area entered must have the same structure as the table dbtab.
Example
Directory of a cluster consisting of two fields and an internal table:
TYPES: BEGIN OF TAB3_LINE,
 CONT(4),
 END OF TAB3_LINE,
 BEGIN OF DIRTAB_LINE.
 INCLUDE STRUCTURE CDIR.
TYPES END OF DIRTAB_LINE.
DATA: INDXKEY LIKE INDX-SRTFD,
 F1(4),
 F2(8) TYPE P decimals 0,
 TAB3 TYPE STANDARD TABLE OF TAB3_LINE,
 DIRTAB TYPE STANDARD TABLE OF DIRTAB_LINE,
 INDX_WA TYPE INDX.
INDXKEY = 'INDXKEY'.
EXPORT F1 = F1
 F2 = F2
 TAB3 = TAB3
 TO DATABASE INDX(ST) ID INDXKEY " TAB3 has 17 entries
 FROM INDX_WA.
IMPORT DIRECTORY INTO DIRTAB FROM DATABASE INDX(ST) ID INDXKEY
 TO INDX_WA.
Then, the table DIRTAB contains the following:
NAME OTYPE FTYPE TFILL FLENG
F1 F C 0 4
F2 F P 0 8
TAB3 T C 17 4
The meaning of the individual fields is as follows:
NAME:
Name of stored object
OTYPE:
Object type (F: Field, R: Field string / Dictionary struc

How to do parallel processing with dynamic internal table

Hi All,
I need to implement parallel processing that involves dynamically created internal tables. I tried doing so using RFC function modules (using starting new task and other such methods) but didn't get success this requires RFC enabled function modules and at the same time RFC enabled function modules do not allow generic data type (STANDARD TABLE) which is needed for passing dynamic internal tables. My exact requirement is as follows:
1. I've large chunk of data in two internal tables, one of them is formed dynamically and hence it's structure is not known at the time of coding.
2. This data has to be processed together to generate another internal table, whose structure is pre-defined. But this data processing is taking very long time as the number of records are close to a million.
3. I need to divide the dynamic internal table into (say) 1000 records each and pass to a function module and submit it to run in another task. Many such tasks will be executed in parallel.
4. The function module running in parallel can insert the processed data into a database table and the main program can access it from there.
Unfortunately, due to the limitation of not allowing generic data types in RFC, I'm unable to do this. Does anyone has any idea how to implement parallel processing using dynamic internal tables in these type of conditions.
Any help will be highly appreciated.
Thanks and regards,
Ashin

try the below code...
DATA: w_subrc TYPE sy-subrc.
DATA: w_infty(5) TYPE c.
data: w_string type string.
FIELD-SYMBOLS: <f1> TYPE table.
FIELD-SYMBOLS: <f1_wa> TYPE ANY.
DATA: ref_tab TYPE REF TO data.
CONCATENATE 'P' infty INTO w_infty.
CREATE DATA ref_tab TYPE STANDARD TABLE OF (w_infty).
ASSIGN ref_tab->* TO <f1>.
* Create dynamic work area
CREATE DATA ref_tab TYPE (w_infty).
ASSIGN ref_tab->* TO <f1_wa>.
IF begda IS INITIAL.
 begda = '18000101'.
ENDIF.
IF endda IS INITIAL.
 endda = '99991231'.
ENDIF.
CALL FUNCTION 'HR_READ_INFOTYPE'
 EXPORTING
 pernr = pernr
 infty = infty
 begda = '18000101'
 endda = '99991231'
 IMPORTING
 subrc = w_subrc
 TABLES
 infty_tab = <f1>
 EXCEPTIONS
 infty_not_found = 1
 OTHERS = 2.
IF sy-subrc <> 0.
 subrc = w_subrc.
ELSE.
ENDIF.

Generic Internal Table

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