Accessing internal tables at runtime.

Hi all,
I am writing a code where in i have to transfer data from excel to database table.
Iam getting the excel data in an itab. Can anybody help me with how to access internal tables at runtime ?
i am using the following code with sy-tabix. here, when the sy-tabix is odd it picks up the value,
but i want that within the same loop when i increment sy-tabix by 1, then it should fetch the second column of same row. But its not working as it shows an error that it does not permit subfield access.
the code is as follows:
LOOP AT t_tab[] into wa_tab .
data: l_tabix type sy-tabix,
        name_index type sy-tabix.
        data: c type i.
        l_tabix = sy-tabix.
        name_index = l_tabix+1.
        c = ( l_tabix mod 2 ).
******to check if sy-tabix is odd**********
       if c ne 0.
         READ TABLE t_tab into wa_tab index l_tabix.
         wa_product1-product = wa_tab-VALUE.
************incrementing sy-tabix*************
         READ TABLE t_tab into wa_tab index name_index. (here it shows error)
         wa_product1-product_name = wa_tab-value.
       endif.
endloop.
Thanks in advance.

Hi Omer,
Copy and paste this code.
=====================================
REPORT ztest_create_data_dynamic .
TYPE-POOLS: slis.
DATA: it_fcat TYPE slis_t_fieldcat_alv,
is_fcat LIKE LINE OF it_fcat.
DATA: it_fieldcat TYPE lvc_t_fcat,
is_fieldcat LIKE LINE OF it_fieldcat.
DATA: new_table TYPE REF TO data.
DATA: new_line TYPE REF TO data.
FIELD-SYMBOLS: <l_table> TYPE ANY TABLE,
<l_line> TYPE ANY,
<l_field> TYPE ANY.
Build fieldcat
CALL FUNCTION 'REUSE_ALV_FIELDCATALOG_MERGE'
EXPORTING
i_structure_name = 'SYST'
CHANGING
ct_fieldcat = it_fcat[].
LOOP AT it_fcat INTO is_fcat WHERE NOT reptext_ddic IS initial.
MOVE-CORRESPONDING is_fcat TO is_fieldcat.
is_fieldcat-fieldname = is_fcat-fieldname.
is_fieldcat-ref_field = is_fcat-fieldname.
is_fieldcat-ref_table = is_fcat-ref_tabname.
APPEND is_fieldcat TO it_fieldcat.
ENDLOOP.
Create a new Table
CALL METHOD cl_alv_table_create=>create_dynamic_table
EXPORTING
it_fieldcatalog = it_fieldcat
IMPORTING
ep_table = new_table.
Create a new Line with the same structure of the table.
ASSIGN new_table->* TO <l_table>.
CREATE DATA new_line LIKE LINE OF <l_table>.
ASSIGN new_line->* TO <l_line>.
Test it...
DO 30 TIMES.
ASSIGN COMPONENT 'SUBRC' OF STRUCTURE <l_line> TO <l_field>.
<l_field> = sy-index.
INSERT <l_line> INTO TABLE <l_table>.
ENDDO.
LOOP AT <l_table> ASSIGNING <l_line>.
ASSIGN COMPONENT 'SUBRC' OF STRUCTURE <l_line> TO <l_field>.
WRITE <l_field>.
ENDLOOP.

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How to get the field name of an internal table during runtime?

How to get the field name of an internal table during runtime?

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Hi Gurus,
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 CLEAR xfc.
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 xfc-ref_table = p_table.
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* xfc-intlen = xdetails-length.
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I tried your method, but I am getting a short dump due to type conflict. I think it's because the internal table I'd like to access is declared using the following syntax:
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How to access internal table

Hi Experts,
I have moved values from node with attributes in context to an internal table using
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importing
table = itab
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Hi Ramanan,
With header line statement is not avilable in OO concepts.
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If you are read your node means it will automatically generate the code.
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generally it looks like,
DATA:
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Xml to abap internal table by using a dynamic internal table at runtime

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<?xml version="1.0" ?>
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<from airport="JFK">NEW YORK,US</from>
<to airport="SFO">SAN FRANCISCO,US</to>
<departure>110000</departure>
<arrival>140100</arrival>
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</flight>
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Hi Ujjwal,
use
CALL TRANSFORMATION
Study the online documentation and if required do some search for CALL TRANSFORMATION and/or XML PARSER
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A few added information,
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Thanks!

Hi,
Check the code below:
REPORT ZYKTEST3 .
DATA: d_ref TYPE REF TO data,
d_ref2 TYPE REF TO data,
i_alv_cat TYPE TABLE OF lvc_s_fcat,
ls_alv_cat LIKE LINE OF i_alv_cat.
TYPES: tabname LIKE dcobjdef-name ,
fieldname LIKE dcobjdef-name,
desc LIKE dntab-fieldtext.
PARAMETER: p_tablen TYPE tabname. -
> Input table field
DATA: BEGIN OF itab OCCURS 0.
INCLUDE STRUCTURE dntab.
DATA: END OF itab.
FIELD-SYMBOLS : <f_fs> TYPE table,
<f_fs1> TYPE table,
<f_fs2> TYPE ANY,
<f_fs3> TYPE ANY,
<f_fs4> type any,
<f_field> TYPE ANY.
REFRESH itab.
CALL FUNCTION 'NAMETAB_GET' -
> Fetches the fields
EXPORTING
langu = sy-langu
tabname = p_tablen
TABLES
nametab = itab
EXCEPTIONS
no_texts_found = 1.
LOOP AT itab .
ls_alv_cat-fieldname = itab-fieldname.
ls_alv_cat-ref_table = p_tablen.
ls_alv_cat-ref_field = itab-fieldname.
ls_alv_cat-seltext = itab-fieldtext.
ls_alv_cat-reptext = itab-fieldtext.
APPEND ls_alv_cat TO i_alv_cat.
ENDLOOP.
internal table build
CALL METHOD cl_alv_table_create=>create_dynamic_table
EXPORTING
it_fieldcatalog = i_alv_cat
IMPORTING
ep_table = d_ref.
ASSIGN d_ref->* TO <f_fs>. -
> Dynamic table creation with fields of the table
DATA: l_field TYPE fieldname,
l_field1 type fieldname.
SELECT * FROM (p_tablen) INTO CORRESPONDING FIELDS OF TABLE <f_fs>.
Fetching of the data from the table
LOOP AT <f_fs> ASSIGNING <f_fs2>.
Here u can check the validations and process
ASSIGN COMPONENT 2 OF STRUCTURE <f_fs2> TO <f_fs3>.
ASSIGN COMPONENT 3 OF STRUCTURE <f_fs2> TO <f_fs4>.
IF sy-subrc = 0.
MOVE <f_fs3> TO l_field.
MOVE <f_fs4> TO l_field1.
WRITE:/1 l_field(20),
22 l_field1(10).
ENDIF.
ENDLOOP.
Regards
Kannaiah

Runtime FIELD DELETION / HIDING of Internal Table

Dear All,
Can Anybody would like to say " How can i delete a field of internal table before passing it the FIELD_CATALOGE_MERGE Function In ALV Report"
Or i wil be also thank ful to you if you would tell me " How can i hide the field of internal table at runtime In ALV Report"
Warm Regards,
Nirav Parekh

HI,
We do not have an option to delete a field from an internal table at runtime, we have an option to delete the data from it .
To hide a Field in ALV :
set wa_fieldcatalog-no_out = 'X'.
loop at t_fieldcatalog into wa_fieldcatalog.
if wa_fieldcatalog-fieldname = 'BOX'.
wa_fieldcatalog-no_out = 'X'.
modify t_fieldcatalog from wa_fieldcatalog.
ENDIF.
ENDLOOP.
Regards
Sudheer

What is the difference betwee STRUCTRUE AND INTERNAL TABLE

what is the difference betwee STRUCTRUE AND INTERNAL TABLE

Hi
Internal table 
Internal Tables are runtime objects.
A. The lines of an internal table always have the same structure
B. You have to define the structure of the internal table at the begining.
C. Internal tables require special work area for interface
Types:
STANDARD table
Key access to a standard table uses a linear search. This means that the time required for a search is in linear relation to the number of table entries.
You should use index operations to access standard tables.
SORTED table
Defines the table as one that is always saved correctly sorted.
Key access to a sorted table uses a binary key. If the key is not unique, the system takes the entry with the lowest index. The runtime required for key access is logarithmically related to the number of table entries.
HASHED table
Defines the table as one that is managed with an internal hash procedure
You can only access a hashed table using the generic key operations or other generic operations ( SORT, LOOP, and so on). Explicit or implicit index operations (such as LOOP ... FROM oe INSERT itab within a LOOP) are not allowed.
 Structure 
 Structure are data dictionary objects. Tcode -SE11
 No data records exist in the database for a structure. Structures are used for the interface definition between programs or between screens and programs.
Reward points if this helps.
Manish
Message was edited by:
 Manish Kumar

Why we need internal tables how it has its own significance for its purpose

we can maintain tables in oracle also and some other features .but how internal tables differ from them in its functioning

u2022 In ABAP/4, you work mainly with tables. Tables are the essential data structures in the R/3 System. Long-life data is stored in relational database tables.
u2022 Besides database tables, you can create internal tables which exist only during the runtime of your program. ABAP/4 provides various operations for working with internal tables. You can, for example, search for, append, insert, or delete lines.
u2022 The number of lines in an internal table is not fixed. Depending on requirements, the system increases the size of internal tables at runtime.
u2022 You can use internal tables to perform table calculations on subsets of database tables. For example, you can read a certain part of a database table into an internal table (see Reading Data into an Internal Table).
From the internal table, you can then calculate totals or generate a ranked list.
In ABAP/4, you can distinguish between internal table data types, which define the structure of internal tables, and internal table data objects, which are the actual internal tables and can be filled with data. An internal table data type is an abstract definition of a data structure which can be used to declare data objects as internal tables.
u2022 Another use for internal tables is reorganizing the contents of database tables according to the needs of your program. For example, you can read data relevant for creating a telephone list from one or several large customer tables into an internal table. During the runtime of your program, you can then access this list directly without having to perform a time-consuming database query for each call.
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.
I hope it helps.
Have a look at below link for details:
[Internal Tables|http://help.sap.com/saphelp_nw70/helpdata/en/fc/eb35de358411d1829f0000e829fbfe/frameset.htm]
Best Regards,
Vibha
Please mark all the helpful answers

DYNAMIC INTERNAL TABLE CREATION BASED ON THE CONTENT OF ANOTHER INTERNAL TA

Hi All
I need to create an internal table at runtime.
I have a selection screen parameter which is specific to country, Which can take values below
eg:- IT_AREA for Italy(IT)
FR_AREA for France(FR)
IE_AREA for Ireland(IE).....And similary for other countries
Based on the Above parameter, I need to create Internal Table as below
DATA: itab TYPE italy_data Occurs 0.
If I declare as above, Then itab has fields from italy_data. And this internal table i will be sending it to Function Module to get data into it.
My Requirement is to Create the Internal table itab during runtime for tables italy_data OR france_data OR ireland_data based on selection screen parameter. Tables on Country may have different number of fields in it.
Can anyone help me on this??

Hi,
Here is a sample code to create a dynamic internal table.
REPORT ytrab03.
TABLES: mara, makt.
TYPE-POOLS: slis.
DATA: it_fcat TYPE slis_t_fieldcat_alv,
is_fcat LIKE LINE OF it_fcat,
ls_layout TYPE slis_layout_alv.
DATA: it_fieldcat TYPE lvc_t_fcat,
is_fieldcat LIKE LINE OF it_fieldcat.
DATA: new_table TYPE REF TO data,
new_line TYPE REF TO data,
ob_cont_alv TYPE REF TO cl_gui_custom_container,
ob_alv TYPE REF TO cl_gui_alv_grid,
vg_campos(255) TYPE c,
i_campos LIKE TABLE OF vg_campos,
vg_campo(30) TYPE c,
vg_tables(60) TYPE c.
DATA: e_params LIKE zutsvga_alv_01.
FIELD-SYMBOLS: <l_table> TYPE table,
<l_line> TYPE ANY,
<l_field> TYPE ANY.
PARAMETERS: p_max(2) TYPE n DEFAULT '20' OBLIGATORY.
is_fcat-fieldname = 'COL01'.
is_fcat-ref_fieldname = 'MATNR'.
is_fcat-ref_tabname = 'MARA'.
APPEND is_fcat TO it_fcat.
is_fcat-fieldname = 'COL02'.
is_fcat-ref_fieldname = 'MAKTX'.
is_fcat-ref_tabname = 'MAKT'.
APPEND is_fcat TO it_fcat.
LOOP AT it_fcat INTO is_fcat.
is_fieldcat-fieldname = is_fcat-fieldname.
is_fieldcat-ref_field = is_fcat-ref_fieldname.
is_fieldcat-ref_table = is_fcat-ref_tabname.
APPEND is_fieldcat TO it_fieldcat.
CONCATENATE is_fieldcat-ref_table is_fieldcat-ref_field
INTO vg_campos SEPARATED BY '~'.
APPEND vg_campos TO i_campos.
ENDLOOP.
*... Create the dynamic internal table
CALL METHOD cl_alv_table_create=>create_dynamic_table
EXPORTING
it_fieldcatalog = it_fieldcat
IMPORTING
ep_table = new_table.
*... Create a new line
ASSIGN new_table->* TO <l_table>.
CREATE DATA new_line LIKE LINE OF <l_table>.
ASSIGN new_line->* TO <l_line>.
SELECT (i_campos) FROM mara INNER JOIN makt
ON mara~matnr = makt~matnr
UP TO p_max ROWS
INTO TABLE <l_table>.
LOOP AT <l_table> INTO <l_line>.
LOOP AT it_fcat INTO is_fcat.
ASSIGN COMPONENT is_fcat-fieldname
OF STRUCTURE <l_line> TO <l_field>.
IF sy-tabix = 1.
WRITE: /2 <l_field>.
ELSE.
WRITE: <l_field>.
ENDIF.
ENDLOOP.
ENDLOOP.
Regards,
Karuna.

How to access a table of SAP standard SAP method from external program

Hi Friends,
I have to access a table and modified it defined in a standard SAP method (PROCESS_INPUT_FILTER) of class (CL_HANDLE_MM).
As we normaly do it in case of Standard program
for example: ('(SAPLMEPO)ett[]') here we are accessing internal table ett defined in SAPLMEPO.
so how we can do the same thing if some thing defined in standard SAP method.
Pl. help.

Thanks for the info guys, it will come in handy.
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