ABAP Select data from SAP table ITBCHAIN into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP ITBCHAIN table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to ITBCHAIN. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the ITBCHAIN table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_ITBCHAIN TYPE STANDARD TABLE OF ITBCHAIN,
      WA_ITBCHAIN TYPE ITBCHAIN,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <ITBCHAIN> TYPE ITBCHAIN.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ITBCHAIN.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ITBCHAIN
  INTO TABLE IT_ITBCHAIN.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ITBCHAIN
*  INTO TABLE @DATA(IT_ITBCHAIN2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_ITBCHAIN INDEX 1 INTO DATA(WA_ITBCHAIN2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ITBCHAIN ASSIGNING <ITBCHAIN>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ITBCHAIN>-MANDT = 1.
<ITBCHAIN>-BANKSREC = 1.
<ITBCHAIN>-BANKKREC = 1.
<ITBCHAIN>-BANKNREC = 1.
<ITBCHAIN>-WAERS = 1.

ENDLOOP.

LOOP AT IT_ITBCHAIN INTO WA_ITBCHAIN.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ITBCHAIN-BANKSSND, sy-vline,
  WA_ITBCHAIN-BANKKSND, sy-vline,
  WA_ITBCHAIN-UZAWE, sy-vline,
  WA_ITBCHAIN-CHAINNO, sy-vline,
  WA_ITBCHAIN-CHAINBANKT, sy-vline,
  WA_ITBCHAIN-CHAINBANKS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ITBCHAIN you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_ITBCHAIN TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_ITBCHAIN INTO WA_ITBCHAIN.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_ITBCHAIN_STR, 
MANDT TYPE STRING,
BANKSREC TYPE STRING,
BANKKREC TYPE STRING,
BANKNREC TYPE STRING,
WAERS TYPE STRING,
BANKSSND TYPE STRING,
BANKKSND TYPE STRING,
UZAWE TYPE STRING,
CHAINNO TYPE STRING,
CHAINBANKT TYPE STRING,
CHAINBANKS TYPE STRING,
CHAINBANKK TYPE STRING,
CHAINBANKN TYPE STRING,
IBAN TYPE STRING,
IBAN_PB TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ITBCHAIN_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_ITBCHAIN_STR-MANDT sy-vline 
WA_ITBCHAIN_STR-BANKSREC sy-vline 
WA_ITBCHAIN_STR-BANKKREC sy-vline 
WA_ITBCHAIN_STR-BANKNREC sy-vline 
WA_ITBCHAIN_STR-WAERS sy-vline 
WA_ITBCHAIN_STR-BANKSSND sy-vline 
WA_ITBCHAIN_STR-BANKKSND sy-vline 
WA_ITBCHAIN_STR-UZAWE sy-vline 
WA_ITBCHAIN_STR-CHAINNO sy-vline 
WA_ITBCHAIN_STR-CHAINBANKT sy-vline 
WA_ITBCHAIN_STR-CHAINBANKS sy-vline 
WA_ITBCHAIN_STR-CHAINBANKK sy-vline 
WA_ITBCHAIN_STR-CHAINBANKN sy-vline 
WA_ITBCHAIN_STR-IBAN sy-vline 
WA_ITBCHAIN_STR-IBAN_PB sy-vline 
WA_ITBCHAIN_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.