ABAP Select data from SAP table TWISPC_INT_ALLOC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TWISPC_INT_ALLOC 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 TWISPC_INT_ALLOC. 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 TWISPC_INT_ALLOC 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_TWISPC_INT_ALLOC TYPE STANDARD TABLE OF TWISPC_INT_ALLOC,
      WA_TWISPC_INT_ALLOC TYPE TWISPC_INT_ALLOC,
      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: <TWISPC_INT_ALLOC> TYPE TWISPC_INT_ALLOC.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TWISPC_INT_ALLOC
*  INTO TABLE @DATA(IT_TWISPC_INT_ALLOC2).
*--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_TWISPC_INT_ALLOC INDEX 1 INTO DATA(WA_TWISPC_INT_ALLOC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TWISPC_INT_ALLOC>-MANDT = 1.
<TWISPC_INT_ALLOC>-PLSZN = 1.
<TWISPC_INT_ALLOC>-PLSCH = 1.
<TWISPC_INT_ALLOC>-PLINT = 1.
<TWISPC_INT_ALLOC>-AUFAR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TWISPC_INT_ALLOC-EKORG, sy-vline,
  WA_TWISPC_INT_ALLOC-EKGRP, sy-vline,
  WA_TWISPC_INT_ALLOC-VZWRK, sy-vline,
  WA_TWISPC_INT_ALLOC-LIFNR, sy-vline,
  WA_TWISPC_INT_ALLOC-ASTRA, sy-vline,
  WA_TWISPC_INT_ALLOC-SBELN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TWISPC_INT_ALLOC 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_TWISPC_INT_ALLOC 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_TWISPC_INT_ALLOC INTO WA_TWISPC_INT_ALLOC.


*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.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TWISPC_INT_ALLOC-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TWISPC_INT_ALLOC-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TWISPC_INT_ALLOC-SBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TWISPC_INT_ALLOC-SBELN.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

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

TYPES: BEGIN OF T_TWISPC_INT_ALLOC_STR, 
MANDT TYPE STRING,
PLSZN TYPE STRING,
PLSCH TYPE STRING,
PLINT TYPE STRING,
AUFAR TYPE STRING,
EKORG TYPE STRING,
EKGRP TYPE STRING,
VZWRK TYPE STRING,
LIFNR TYPE STRING,
ASTRA TYPE STRING,
SBELN TYPE STRING,
LIEFW TYPE STRING,
WERKS_TO_KUNNR TYPE STRING,
RFCDEST TYPE STRING,
BACKRFC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TWISPC_INT_ALLOC_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_TWISPC_INT_ALLOC_STR-MANDT sy-vline 
WA_TWISPC_INT_ALLOC_STR-PLSZN sy-vline 
WA_TWISPC_INT_ALLOC_STR-PLSCH sy-vline 
WA_TWISPC_INT_ALLOC_STR-PLINT sy-vline 
WA_TWISPC_INT_ALLOC_STR-AUFAR sy-vline 
WA_TWISPC_INT_ALLOC_STR-EKORG sy-vline 
WA_TWISPC_INT_ALLOC_STR-EKGRP sy-vline 
WA_TWISPC_INT_ALLOC_STR-VZWRK sy-vline 
WA_TWISPC_INT_ALLOC_STR-LIFNR sy-vline 
WA_TWISPC_INT_ALLOC_STR-ASTRA sy-vline 
WA_TWISPC_INT_ALLOC_STR-SBELN sy-vline 
WA_TWISPC_INT_ALLOC_STR-LIEFW sy-vline 
WA_TWISPC_INT_ALLOC_STR-WERKS_TO_KUNNR sy-vline 
WA_TWISPC_INT_ALLOC_STR-RFCDEST sy-vline 
WA_TWISPC_INT_ALLOC_STR-BACKRFC sy-vline      INTO ld_text SEPARATED BY SPACE.

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