Internal table reading

Hi Guys,
I have one internal table, I need to loop the table and READ the same table with in the loop.
My requirement is like this:
In the internal table KUNNR VKORG and VTWEG, if three fields values are same for more then one record, i need to append those records into another internal table.
Could any one help me.
Thanks,
Gourisankar

Hi,
Loop at itab1 into wa_tab1.
Read table itab1 into wa_tab2 with key kunnr = wa_tab1-kunnr
                                                          vkorg = wa_tab1-vkorg
                                                          vtweg = wa_tab1-vtweg
                                                          field4 NE wa_tab1-field4 .
If sy-subrc = 0.
Append wa_tab2 to itab2.
endif.
Endloop.
Important:    Here field4 should be a unique key in ur internal table.
Regards,
Prem

Similar Messages

Regarding internal table read.

Hi,
i want to read internal table and compare the one variable existing with in from date and to date.
the psudo code is like this
READ TABLE L_TABEMPLOYEE INTO L_WAEMPLOYEE WITH KEY EMPLOYEE = SOURCE_FIELDS_RULE-PERNR
ULTIMO BETWEEN L_WAEMPLOYEE-DATEFROM AND L_WAEMPLOYEE-DATETO.
but this statement gives error.
how to code for the same requirement.
regards,
swami.

Hi,
Recode like this.It will definitely work
LOOP AT L_TABEMPLOYEE INTO L_WAEMPLOYEE
                             WHERE EMPLOYEE = SOURCE_FIELDS_RULE-PERNR
                                          AND ULTIMO > L_WAEMPLOYEE-DATEFROM
                                          AND ULTIMO < L_WAEMPLOYEE-DATETO.
<Write what you want to do here >
ENDLOOP.
Please reward if useful
Thanks Arjun
Edited by: Arjun Puthuruthy on Mar 26, 2008 10:52 AM

Internal table Read statement

Hi,
AM using Read statement to read internal table as below.
Read itab into wa with key x = y.
if sy-subrc eq 0.
do some thing.
endif.
However the work area wa is not useful to me in my program. when am doing extended check it is issueing warning saying wa is not used. HOW TO CLOSE THIS WARNING.
Regards,
AAkash

just before read statement do
CLEAR WA.
This should remove the error.
Cheers
VJ

Read info about files in specific folder into internal table

Hi Experts
I need to have last modified date and filename information read into an internal table. I need to read in the information of all files in a specific (UNIX) folder (I do not know the name of the single files).
I really hope someone can help.
Thanks a lot
Kind regards,
Torben

Hi Guys
Thanks a lot for you input.
I managed to get my program to works as follows:
REPORT ZDELETE_ARCHIVING_FILES.
*Step 1: Get the list of files in the directory into internal table :
DATA: DLIST    LIKE EPSFILI OCCURS 0 WITH HEADER LINE,
      DPATH    LIKE EPSF-EPSDIRNAM,
      MDATE    LIKE SY-DATUM,
      MTIME    LIKE SY-UZEIT.
DATA: BEGIN OF FATTR OCCURS 0,
          FILE_NAME LIKE EPSF-EPSFILNAM,
          FILE_SIZE LIKE EPSF-EPSFILSIZ,
          FILE_OWNER LIKE EPSF-EPSFILOWN,
          FILE_MODE LIKE EPSF-EPSFILMOD,
          FILE_TYPE LIKE EPSF-EPSFILTYP,
          FILE_MTIME(12),
      END OF FATTR.
DATA: P_PATH(50) TYPE C.
CONCATENATE '/ARCHIVE/' sy-sysid '/archive' INTO P_PATH.
*        WRITE: / P_PATH.
DPATH = P_PATH.
*Get files in folder - read into internal table DLIST
*if filenames are longer than 40 characters
*then use FM SUBST_GET_FILE_LIST.
CALL FUNCTION 'EPS_GET_DIRECTORY_LISTING'
     EXPORTING
          DIR_NAME               = DPATH
     TABLES
          DIR_LIST               = DLIST
     EXCEPTIONS
          INVALID_EPS_SUBDIR     = 1
          SAPGPARAM_FAILED       = 2
          BUILD_DIRECTORY_FAILED = 3
          NO_AUTHORIZATION       = 4
          READ_DIRECTORY_FAILED = 5
          TOO_MANY_READ_ERRORS   = 6
          EMPTY_DIRECTORY_LIST   = 7
          OTHERS                 = 8.
IF SY-SUBRC EQ 0.
*Step 2: Read the file attributes into an internal table
*Read info about the files (attributes) into the internal table FATTR
*as we need info about the last time it was changed (MTIME)
LOOP AT DLIST.
    CALL FUNCTION 'EPS_GET_FILE_ATTRIBUTES'
         EXPORTING
              FILE_NAME              = DLIST-NAME
              DIR_NAME               = DPATH
         IMPORTING
              FILE_SIZE              = FATTR-FILE_SIZE
              FILE_OWNER             = FATTR-FILE_OWNER
              FILE_MODE              = FATTR-FILE_MODE
              FILE_TYPE              = FATTR-FILE_TYPE
              FILE_MTIME             = FATTR-FILE_MTIME
         EXCEPTIONS
              READ_DIRECTORY_FAILED = 1
              READ_ATTRIBUTES_FAILED = 2
              OTHERS                 = 3.
    IF SY-SUBRC EQ 0.
      FATTR-FILE_NAME = DLIST-NAME.
      APPEND FATTR.
    ENDIF.
ENDLOOP.
SORT FATTR BY FILE_NAME.
DATA: time(10), date LIKE sy-datum.
DATA: months TYPE i.
DATA: e_file TYPE string.
LOOP AT FATTR.
CLEAR: time, months, e_file.
    IF FATTR-FILE_NAME(10) = 'archive_BW'.
*Convert the unix time into readable time
      PERFORM p6_to_date_time_tz(rstr0400) USING FATTR-FILE_MTIME
                                                 time
                                                 date.
*Calculate the number of months between date (MTIME) and current day
*ex 31.03.2009 - 01.04.2009 = 1 month
*ex 01.02.2009 - 01.04.2009 = 2 month
    CALL FUNCTION 'MONTHS_BETWEEN_TWO_DATES'
      EXPORTING
        i_datum_von = date
        i_datum_bis = sy-datum
      IMPORTING
        e_monate = months.
        CONCATENATE DPATH '/' FATTR-FILE_NAME INTO e_file.
*        WRITE: / FATTR-FILE_NAME,
*                 FATTR-FILE_SIZE,
*                 date,
*                 time,
*                 sy-datum,
*                 months,
*                 e_file.
*Step 3: Delete files where months > 1
      IF months > 1.
        OPEN dataset e_file for output in text mode encoding default.
        DELETE dataset e_file.
        CLOSE dataset e_file.
      ENDIF. "months > 1
    ENDIF.
ENDLOOP.
ENDIF.

Performance Issue When Read from Internal Table

In my form, I have 6 windows which contain all the header information, which are kept in my gt_header internal table. Since all windows required data from the same internal table, reading the internal table at Initialization for once or, creating the LOOP at each window, which one will be a better choice in terms of performance?

Hi,
you cannot create 6 windows under loop.You can only have loop under a window only.
So create a big window which covers whole area of 6 windows.Create templete under that and write only one loo with text in all those boxes of that templete.
Regards,
Rock.

Using internal tables in BI 7 Start routines

Hi All
I tried searching for using internal tables in a start routine in BI 7 could not find the right pointers.
This is what I am trying to do is the following:
In a DSO ZSD_O01 I have a sales order and sales order item number and this DSO also contains the Contract number and the contract Item number.
The DSO structure is as follows:
/BIC/AZSD_O0100
DOC_NUMBER
ITEM
CONTRACT
CITEMNUM
I want to read the data in this DSO into a internal table. But the key fields in this DSO is DOC_NUMBER and ITEM so I want to read this data into a internal table only for the first data package into the internal table. Thereafter I want to lookup into the internal table given the doc_number and ITEM to find the CONTRACT and CITEMNUM.
Can any of you kindly show me how to :
- Read data from a DSO into a internal table
- Read the internal table for the first data package
- How do I make the access in the internal table fast when my lookup in the internal table is not on the
DSO key columns but on a different key column
Appreciate your help
Thanks
Karen

Hi Karen ,
It will be helpful if you tell your requirement as the approach you suggested is not looks convincing .May be their is some easy way and we can suggest you better approach
-how to check for source_package = 1
You need to hard code it .
We decide package size at DTP level so you can declare a global variable .let say you have 50000 size of your package then use global variable as counter and read only when record_count is <= 50000 .
-how to declare the internal table so the values in it exists between different data packages
Declare a global table and select data into it .A global table retain data across the packages .
- The key on which I need to lookup in the internal table is not the key fields as in the DSO
Its ok .Let say you are doing lookup on A B and C field of DSO1 and the values may duplicate in your source .then you just need to read the internal table having data from DSO2 with key field A B C .
Better if you set them as semantic keys at DTP level so that all duplicate entries of A B C will appear in same package .
global Declarations
In your start routine you will have this following code :
TYPES:
      tyt_SC_1        TYPE STANDARD TABLE OF tys_SC_1
                        WITH NON-UNIQUE DEFAULT KEY.
$$ begin of global - insert your declaration only below this line -
...   insert your code here
$$ end of global - insert your declaration only before this line   -
One question
Why you want to populate values for 1 source package only not for all ?This will be helpful to understand your requirement and may be we can fulfill it in some other manner .
Regards,
Jaya Tiwari

Issue with uploading XML file from application server into internal table

i Need to fetch the XML file from the application server and place into internal table and i am getting error message while using the functional module   SMUM_XML_PARSE and the error message is "line   1 col   1-unexpected symbol; expected '<', '</', entity reference, character data, CDATA section, processing instruction or comment" and could you please let me know how to resolve this issue?
    TYPES: BEGIN OF T_XML,
             raw(2000) TYPE C,
           END OF T_XML.
DATA:GW_XML_TAB TYPE T_XML.
DATA: GI_XML_TAB TYPE TABLE OF T_XML INITIAL SIZE 0.
DATA:GI_STR TYPE STRING.
data: GV_XML_STRING TYPE XSTRING.
DATA: GI_XML_DATA TYPE TABLE OF SMUM_XMLTB INITIAL SIZE 0.
data:GI_RETURN TYPE STANDARD TABLE OF BAPIRET2.
    OPEN DATASET LV_FILE1 FOR INPUT IN TEXT MODE ENCODING DEFAULT.
    IF SY-SUBRC NE 0.
      MESSAGE 'File does not exist' TYPE 'E'.
    ELSE.
      DO.
* Transfer the contents from the file to the work area of the internal table
        READ DATASET LV_FILE1 INTO GW_XML_TAB.
        IF SY-SUBRC EQ 0.
          CONDENSE GW_XML_TAB.
*       Append the contents of the work area to the internal table
          APPEND GW_XML_TAB TO GI_XML_TAB.
        ELSE.
          EXIT.
        ENDIF.
      ENDDO.
    ENDIF.
* Close the file after reading the data
    CLOSE DATASET LV_FILE1.
    IF NOT GI_XML_TAB IS INITIAL.
      CONCATENATE LINES OF GI_XML_TAB INTO GI_STR SEPARATED BY SPACE.
    ENDIF.
* The function module is used to convert string to xstring
    CALL FUNCTION 'SCMS_STRING_TO_XSTRING'
      EXPORTING
        TEXT   = GI_STR
      IMPORTING
        BUFFER = GV_XML_STRING
      EXCEPTIONS
        FAILED = 1
        OTHERS = 2.
    IF SY-SUBRC <> 0.
      MESSAGE 'Error in the XML file' TYPE 'E'.
    ENDIF.
ENDIF.
IF GV_SUBRC = 0.
* Convert XML to internal table
    CALL FUNCTION 'SMUM_XML_PARSE'
      EXPORTING
        XML_INPUT = GV_XML_STRING
      TABLES
        XML_TABLE = GI_XML_DATA
        RETURN    = GI_RETURN.
ENDIF.
READ TABLE GI_RETURN TRANSPORTING NO FIELDS WITH KEY TYPE = 'E'.
IF SY-SUBRC EQ 0.
    MESSAGE 'Error converting the input XML file' TYPE 'E'.
ELSE.
    DELETE GI_XML_DATA WHERE TYPE <> 'V'.
    REFRESH GI_RETURN.
ENDIF.

Could you please tel me why the first 8 lines were removed, till <Soap:Body and also added the line <?xml version="1.0" encoding="UTF-8"?> in the beggining .
Becuase there will be lot of XML files will be coming from the Vendor daily and that should be uploaded in the application server and should update in the SAP tables based on the data in the XML file.
what information i need to give to vendor that do not add the first 8 lines in the XML file and add the line in the beggining <?xml version="1.0" encoding="UTF-8"?>   ??????
Is there any other way we can do with out removing the lines?

How to do a SELECT from different tables into an internal table?

How to do a SELECT from different tables into an internal table?
I want to select data from MARA, MARC and ZPERSON and populate my ITAB_FINAL
REPORT zinternal_table.
TABLES:
mara,
marc,
zperson.
TYPES:
BEGIN OF str_table1,
v_name LIKE zperson-zname,
v_matnr LIKE marc-matnr,
v_emarc LIKE marc-emarc,
v_werks_d LIKE marc-werks_d,
v_dstat LIKE marc-dstat,
END OF str_table,
i_table1 TYPE STANDARD TABLE OF str_table1.
DATA:
BEGIN OF str_table2,
v_mandt LIKE mara-mandt,
v_ernam LIKE mara-ernam,
v_laeda LIKE mara-laeda,
END OF str_table2,
itab_final LIKE STANDARD TABLE OF str_table2.

first find the link between mara , marc and zperson , if u have link to 3 tables then u can jus write a join and populate the table u want ( thats final table with all the fields).
u defenitely have alink between mara and marc so join them and retrieve all data into one internal table.
then for all the entries in that internal table retrieve data from zperson into another internal table.
then loop at one internal table
read another internal table where key equals in both the tables.
finally assign fileds if sy-subrc = 0.
gs_finaltable-matnr = gs_table-matnr
etc...
and finally append gs_finaltable to gt_finaltable.
there u go ur final table has all the data u want.
regards
Edited by: BrightSide on Apr 2, 2009 3:49 PM

Excel to Internal Table Issue

Hi Experts,
Row
Column
Value
1
0001
Prem(First Name )
1
0002
Raj(Middle name )
1
0003
Kaushik(Last name
2
0001
Naresh
I have the above data in excel file and my internal table like as follows
Data : begin of it_itab occurs 0,
Row type c,
Column type string,
Value type string,
End of it_itab.
Now I want to upload the excel file to my internal table
filed wise i.e in my intenal table row
shold have row values from excel same as
for column and value also
Can anyone suggest me fix this issue?
Best Regards,
Ramjee M

You may use this function to put data in internal table.
CALL FUNCTION 'KCD_EXCEL_OLE_TO_INT_CONVERT'
     EXPORTING
       filename                = p_file *xcel file name
       i_begin_col             = p_scol *start column
       i_begin_row             = p_srow *start row
       i_end_col               = p_ecol *end col
       i_end_row               = p_erow *end row
     TABLES
       intern                  = it_tab
     EXCEPTIONS
       inconsistent_parameters = 1
       upload_ole              = 2
       OTHERS                  = 3.
Use this function to put data in internal table.

How can I get the name of an internal table in a textfield?

Hi,
I have defined an internal table in a program. Now I need the name of thist table (<u>NOT</u> the components!!!) in a textfield.
Example for Data-Definitions in my Program:
data: begin of it_tab occurs 0,
        feld1 like icon-id,
        feld2 like icon-name,
      end of it_tab.
data: tabname(30) type c.
How can I transfer the name "IT_TAB" into the field tabname?
Thanks in andvance!

No, it has to by 'dynamic'. I don't want to transfer it hard, because it should work for any internal table name.
The requirement is: There are many function modules that have an input field TABLENAME. I have to give the tablename in the Form 'IT_TAB'.
But I look for a possibiltity not to write:
tabname = 'IT_TAB'.
For DDIC-Tables its not a problem, but I dont know a way for internal tables.

Update all alv (grid) displayed records to internal table

Hi all,
i want to update the records into the internal table which are changed by the user in the edit field.
after he select save button.
i have to save the ALV grid displayed records in the internal table.
hw can i do this ?

ALV with EDIT and SAVE functionality
Code:REPORT z_demo_alv_jg.*******************************************************************
TYPE-POOLS                                                      *
TYPE-POOLS: slis. *******************************************************************
INTERNAL TABLES/WORK AREAS/VARIABLES     *
DATA: i_fieldcat TYPE slis_t_fieldcat_alv,
      i_index TYPE STANDARD TABLE OF i WITH HEADER LINE,
      w_field TYPE slis_fieldcat_alv,
      p_table LIKE dd02l-tabname,
      dy_table TYPE REF TO data,
      dy_tab TYPE REF TO data,
      dy_line TYPE REF TO data.*******************************************************************
FIELD-SYMBOLS                                                   *
FIELD-SYMBOLS: <dyn_table> TYPE STANDARD TABLE,
               <dyn_wa> TYPE ANY,
               <dyn_field> TYPE ANY,
               <dyn_tab_temp> TYPE STANDARD TABLE.*******************************************************************
SELECTION SCREEN                                                *
PARAMETERS: tabname(30) TYPE c,
            lines(5) TYPE n.*******************************************************************
START-OF-SELECTION                                              *
START-OF-SELECTION.* Storing table name
p_table = tabname.* Create internal table dynamically with the stucture of table name
entered in the selection screen
CREATE DATA dy_table TYPE STANDARD TABLE OF (p_table).
ASSIGN dy_table->* TO <dyn_table>.
IF sy-subrc <> 0.
    MESSAGE i000(z_zzz_ca_messages) WITH ' No table found'.    LEAVE TO LIST-PROCESSING.
ENDIF.
Create workarea for the table
CREATE DATA dy_line LIKE LINE OF <dyn_table>.
ASSIGN dy_line->* TO <dyn_wa>.* Create another temp. table
CREATE DATA dy_tab TYPE STANDARD TABLE OF (p_table).
ASSIGN dy_tab->* TO <dyn_tab_temp>. SORT i_fieldcat BY col_pos.* Select data from table
SELECT * FROM (p_table)
INTO TABLE <dyn_table>
UP TO lines ROWS. REFRESH <dyn_tab_temp>.* Display report
CALL FUNCTION 'REUSE_ALV_LIST_DISPLAY'
    EXPORTING
      i_callback_program       = sy-repid
      i_structure_name         = p_table
      i_callback_user_command = 'USER_COMMAND'
      i_callback_pf_status_set = 'SET_PF_STATUS'
    TABLES
      t_outtab                 = <dyn_table>
    EXCEPTIONS
      program_error            = 1
      OTHERS                   = 2. IF sy-subrc <> 0. ENDIF.&----
*&      Form SET_PF_STATUS
      Setting custom PF-Status
     -->RT_EXTAB   Excluding table
FORM set_pf_status USING rt_extab TYPE slis_t_extab. SET PF-STATUS 'Z_STANDARD'.ENDFORM.                    "SET_PF_STATUS&----
*&      Form user_command
      Handling custom function codes
     -->R_UCOMM      Function code value
     -->RS_SELFIELD Info. of cursor position in ALV
FORM user_command USING    r_ucomm LIKE sy-ucomm
                           rs_selfield TYPE slis_selfield.* Local data declaration
DATA: li_tab TYPE REF TO data,
        l_line TYPE REF TO data.* Local field-symbols
FIELD-SYMBOLS:<l_tab> TYPE table,
                <l_wa> TYPE ANY.* Create table
CREATE DATA li_tab TYPE STANDARD TABLE OF (p_table).
ASSIGN li_tab->* TO <l_tab>.* Create workarea
CREATE DATA l_line LIKE LINE OF <l_tab>.
ASSIGN l_line->* TO <l_wa>. CASE r_ucomm.*   When a record is selected
    WHEN '&IC1'.*     Read the selected record
      READ TABLE <dyn_table> ASSIGNING <dyn_wa> INDEX
      rs_selfield-tabindex.      IF sy-subrc = 0.*       Store the record in an internal table
        APPEND <dyn_wa> TO <l_tab>.*       Fetch the field catalog info
        CALL FUNCTION 'REUSE_ALV_FIELDCATALOG_MERGE'
          EXPORTING
            i_program_name         = 'Z_DEMO_PDF_JG'
            i_structure_name       = p_table
          CHANGING
            ct_fieldcat            = i_fieldcat
          EXCEPTIONS
            inconsistent_interface = 1
            program_error          = 2
            OTHERS                 = 3.
        IF sy-subrc = 0.*         Make all the fields input enabled except key fields
          w_field-input = 'X'.          MODIFY i_fieldcat FROM w_field TRANSPORTING input
          WHERE key IS INITIAL.        ENDIF.*       Display the record for editing purpose
        CALL FUNCTION 'REUSE_ALV_LIST_DISPLAY'
          EXPORTING
            i_callback_program    = sy-repid
            i_structure_name      = p_table
            it_fieldcat           = i_fieldcat
            i_screen_start_column = 10
            i_screen_start_line   = 15
            i_screen_end_column   = 200
            i_screen_end_line     = 20
          TABLES
            t_outtab              = <l_tab>
          EXCEPTIONS
            program_error         = 1
            OTHERS                = 2.        IF sy-subrc = 0.*         Read the modified data
          READ TABLE <l_tab> INDEX 1 INTO <l_wa>.*         If the record is changed then track its index no.
        and populate it in an internal table for future
        action
          IF sy-subrc = 0 AND <dyn_wa> <> <l_wa>.
            <dyn_wa> = <l_wa>.
            i_index = rs_selfield-tabindex.
            APPEND i_index.
          ENDIF.
        ENDIF.      ENDIF.*   When save button is pressed
    WHEN 'SAVE'.*     Sort the index table
      SORT i_index.*     Delete all duplicate records
      DELETE ADJACENT DUPLICATES FROM i_index.      LOOP AT i_index.*       Find out the changes in the internal table
      and populate these changes in another internal table
        READ TABLE <dyn_table> ASSIGNING <dyn_wa> INDEX i_index.
        IF sy-subrc = 0.
          APPEND <dyn_wa> TO <dyn_tab_temp>.
        ENDIF.      ENDLOOP.*     Lock the table
      CALL FUNCTION 'ENQUEUE_E_TABLE'
        EXPORTING
          mode_rstable   = 'E'
          tabname        = p_table
        EXCEPTIONS
          foreign_lock   = 1
          system_failure = 2
          OTHERS         = 3.      IF sy-subrc = 0.*       Modify the database table with these changes
        MODIFY (p_table) FROM TABLE <dyn_tab_temp>.        REFRESH <dyn_tab_temp>.*       Unlock the table
        CALL FUNCTION 'DEQUEUE_E_TABLE'
          EXPORTING
            mode_rstable = 'E'
            tabname      = p_table.      ENDIF.
ENDCASE. rs_selfield-refresh = 'X'.ENDFORM.                    "user_command

Populate data from internal table

Hi Experts,
DATA: BEGIN OF it_tables OCCURS 0,
          file(30),
          tabname TYPE tabname,
          END OF it_tables.
DATA: ldo_data TYPE REF TO data,
           ld_tabnam TYPE tabname.
FIELD-SYMBOLS: <lt_itab> TYPE table.
ld_tabnam = it_tables-tabname.
CREATE DATA ldo_data TYPE STANDARD TABLE OF (ld_tabnam).
ASSIGN ldo_data->* TO <lt_itab>.
ld_tabnam = it_tables-file.
In the above code it_tables-tabname contains the structure name by which <lt_itab> structure is declared. it_tables-file contains the internal table name.
Now the next step is, i want to populate data from the internal table using ld_tabnam into <lt_itab>.
Is this possible?
Thanks & Ragards
Akshay

HI,
Refer to this link..how to populate the dynamic internal table
How to populate data into Dynamic Internal Table.

Doubt in internal tables

hi experts
could you please tell difference between linear search, binary search and hashed mechanism.
above 3 which is faster and why.
if i use binary search in descending order it will search the records are not could please send why.

Hi Sayeed,
Standard table:
The key access to a standard table uses a sequential search. The time required for an access is linearly dependent on the number of entries in the internal table.
You should usually access a standard table with index operations.
Sorted table:
The table is always stored internally sorted by its key. Key access to a sorted table can therefore use a binary search. If the key is not unique, the entry with the lowest index is accessed. The time required for an access is logarithmically dependent on the number of entries in the internal table.
Index accesses to sorted tables are also allowed. You should usually access a sorted table using its key.
Hash table:
The table is internally managed with a hash procedure. All the entries must have a unique key. The time required for a key access is constant, that is it does not depend on the number of entries in the internal table.
You cannot access a hash table with an index. Accesses must use generic key operations (SORT, LOOP, etc.).
Index table:
The table can be a standard table or a sorted table.
Index access is allowed to such an index table. Index tables can be used to define the type of generic parameters of a FORM (subroutine) or a function module.
Just have a look at these links:
http://help.sap.com/saphelp_nw04/helpdata/en/90/8d7304b1af11d194f600a0c929b3c3/frameset.htm
http://help.sap.com/saphelp_nw04/helpdata/en/74/83015785d811d295a800a0c929b3c3/frameset.htm
Also Go through the following Document
1.1 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.
1.2 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.
1.3 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.
1.4 INDEX table
A table that can be accessed using an index.
Index table is only used to specify the type of generic parameters in a FORM or FUNCTION. That means that you can't create a table of type INDEX.
Standard tables and sorted tables are index tables.
1.5 ANY table
Any table is only used to specify the type of generic parameters in a FORM or FUNCTION. That means that you can't create a table of type ANY.
Standard, sorted and hashed tables belongs to ANY tables.
2. Defining an internal table
DATA itab TYPE table type of line type [WITH UNIQUE/NON-UNIQUE KEY <key>] [Iinitial size n] [WITH HEADER LINE]
Note: There are also other ways to define an internal table. Please refere to the documentation.
2.1 The KEY option
KEY key1,,keyn :
key1..keyn are fields in the table. The sequence in which you specify the key is significant.
DEFAULT KEY :
The key fields are the standard keys. Note that you can only specify an empty key for tables with access type STANDARD TABLE. The standard key basically comprises all tables fields with character-like types (type ( C, STRING, D, T, N, X, XSTRING). In particular, components with a numeric type (also refer to ABAP numeric types) and table components usually do not belong to the standard key.
Example:
types:
begin of t_makt,
    matnr like makt-matnr,
    maktx like makt-maktx,
end of t_makt.
data:
Define the table
gi_makt type sorted table of t_makt with unique key matnr.
Define the work area for the table if necessary
gi_makt type t_makt.
3. Reading internal tables
READ TABLE itab WITH TABLE KEY k1 = v1 k2 = v2 [additions]
Note: In case of more than one match, it is the first match that is selected.
STANDARD TABLE: The system searches from the start of the table. The response time is in linear relation to the number of table entries.
     SORTED TABLE: The response time is in logarithmic relation to the number of table entries.
     HASHED TABLE: The response time is constant
READ TABLE itab WITH KEY k1 = v1 k2 = v2 [BINARY SEARCH] [additions]
Note: In case of more than one match, it is the first match that is selected.
STANDARD TABLE: If you use the ... BINARY SEARCH addition, the system uses a binary search. Otherwise, the search is sequential. This assumes that the internal table is sorted in ascending order in the sequence of the specified key fields.
     SORTED TABLE: If the specified key fields form a left-justified extract of the table key, the search is binary, otherwise sequential.
     HASHED TABLE: Sequential search.
READ TABLE itab INDEX i [additions]
Accessing the table entry with the index i.
Additions:
INTO wa - wa is used as output area
     ASSIGNING <fs> - The field symbol <fs> is assigned to the entry. This saves the cost of copying the contents in comparison to the first addition. However, this addition does involve table administration costs, and it is therefore only worthwile for lines longer than around 300 bytes.
     COMPARING f1...fn - If the system find an entry, the system compares the subfields f1, f2, ... with the corresponding fields of the work area before they are transported into it.
     COMPARING ALL FIELDS
     TRANSPORTING f1 f2 - If the system finds an entry, it does not transfer all of the subfields (default) into the work area, but only the specified fields f1 f2 ...; the other subfields remain unchanged.
TRANSPORTING NO FIELDS
Example:
loop at gi_mseg into g_mseg.
   read table gi_makt
     with table key matnr = g_mseg-matnr
     into g_makt.
endloop.
Regards
Sreeni

Comparing two internal tables

HI all!
I have two internal tables with single field values as below :
1st Internal Table : A,B,C,D
2nd Internal Table : A,B,C,D,E,F,G,
Now I want to compare these two Int. tables and delete the second int. table with values which are not there in the first int. table.Any simple logic to get this.
Regards
Pavan

Sort internal table 1 by A B C D.
Now ..
copy contents of 2nd table to a temp table.
loop at 2nd internal table.
read 1st internal table with key a = 2internal table a
b = 2internal table b
c = 2internal table c
d = 2internal table d.
if sy-subrc ne 0.
delete entry from temp table.
now refresh table 2.
copy contents of temp to table 2.
Guys,
I guess DELETING THE SAME TABLE WITHIN A LOOP .. ENDLOOP is not advisable.Please correct me if i m wrong.
endif.
endloop.
Message was edited by: Nishanth Bhandar
Message was edited by: Nishanth Bhandar

Method to transfer data from Table control to Internal table

hi,
Hi,
I´m working with CL_GUI_ALV_GRID and use the following methods:
- CALL METHOD grid->set_table_for_first_display, to display my ALV;
- CALL METHOD grid->get_selected_rows, to select the rows.
But i have some fields that can suffer alterarions in the values...
How can i recoup this values from the screen? Is there any method to do this?
thnks.

HI,
You neeed to handle the change event.
Example below...
Definition.
Code:
CLASS lcl_event_handler DEFINITION.
PUBLIC SECTION.
    METHODS:
          handle_data_changed
        FOR EVENT data_changed
        OF cl_gui_alv_grid
        IMPORTING er_data_changed.
ENDCLASS.                    "lcl_event_handler DEFINITION
Implement
Code:
    CLASS lcl_event_handler IMPLEMENTATION.
METHOD handle_data_changed.
    CONSTANTS:
      lc_wa(11) TYPE c VALUE '<LW_SDITM>-'.
    DATA:
      l_subrc TYPE sy-subrc,
      l_variable TYPE string,
      lw_good TYPE lvc_s_modi.
    FIELD-SYMBOLS:
      <lw_sditm> TYPE /powercor/sditm,
      <lw> TYPE ANY. "Generic field symbol
    LOOP AT er_data_changed->mt_good_cells INTO lw_good.
    Update the internal table
      READ TABLE t_item_sel ASSIGNING <lw_sditm> INDEX lw_good-row_id.
      IF sy-subrc EQ 0.
        CONCATENATE lc_wa lw_good-fieldname INTO l_variable.
        ASSIGN (l_variable) TO <lw>.
        IF sy-subrc EQ 0.
          <lw> = lw_good-value.
        ENDIF.
     ENDIF.
     ENDLOOP.
ENDMETHOD.                    "handle_data_changed
ENDCLASS.                    "lcl_event_handler IMPLEMENTATION
Set for your grid.
Code:
SET HANDLER g_handler->handle_data_changed FOR my_grid.
Cheers,
Chandra Sekhar.

Internal table reading

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