ABAP Select data from SAP table CACS_OAWL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CACS_OAWL
*  INTO TABLE @DATA(IT_CACS_OAWL2).
*--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_CACS_OAWL INDEX 1 INTO DATA(WA_CACS_OAWL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CACS_OAWL>-MANDT = 1.
<CACS_OAWL>-OAWLID = 1.
<CACS_OAWL>-OAPLUG = 1.
<CACS_OAWL>-RFCDEST = 1.
<CACS_OAWL>-CLNTAPPL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CACS_OAWL-OAWLDID, sy-vline,
  WA_CACS_OAWL-OASCID, sy-vline,
  WA_CACS_OAWL-IMPLCL, sy-vline,
  WA_CACS_OAWL-OBJTD, sy-vline,
  WA_CACS_OAWL-TOBJTD, sy-vline,
  WA_CACS_OAWL-OARUID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CACS_OAWL 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_CACS_OAWL 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_CACS_OAWL INTO WA_CACS_OAWL.


*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 OAWLID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CACS_OAWL-OAWLID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CACS_OAWL-OAWLID.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ISOLA, internal->external for field TXTSPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_CACS_OAWL-TXTSPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CACS_OAWL-TXTSPRAS.
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_CACS_OAWL_STR, 
MANDT TYPE STRING,
OAWLID TYPE STRING,
OAPLUG TYPE STRING,
RFCDEST TYPE STRING,
CLNTAPPL TYPE STRING,
OAWLDID TYPE STRING,
OASCID TYPE STRING,
IMPLCL TYPE STRING,
OBJTD TYPE STRING,
TOBJTD TYPE STRING,
OARUID TYPE STRING,
OATYID TYPE STRING,
OAPDP TYPE STRING,
MCODE TYPE STRING,
CTXTPARGUID TYPE STRING,
OSELSTRUCT TYPE STRING,
OSELMETH TYPE STRING,
OSELREP TYPE STRING,
OSELVAR TYPE STRING,
TSELSTRUCT TYPE STRING,
TSELMETH TYPE STRING,
TSELREP TYPE STRING,
TSELVAR TYPE STRING,
PARSTRUCT TYPE STRING,
PARREP TYPE STRING,
PARVAR TYPE STRING,
CTXTSTRUCT TYPE STRING,
CTXTMETH TYPE STRING,
CTXTREP TYPE STRING,
CTXTVAR TYPE STRING,
NXTOAGRP TYPE STRING,
CREUSR TYPE STRING,
CREDAT TYPE STRING,
CRETIM TYPE STRING,
OALOGEXT TYPE STRING,
OASTATUS TYPE STRING,
LTLOCK TYPE STRING,
LNGTXTID TYPE STRING,
TXTSPRAS TYPE STRING,
DESCR TYPE STRING,
CHG_TCODE TYPE STRING,
CHG_USR TYPE STRING,
CHG_DAT TYPE STRING,
CHG_TIM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CACS_OAWL_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_CACS_OAWL_STR-MANDT sy-vline 
WA_CACS_OAWL_STR-OAWLID sy-vline 
WA_CACS_OAWL_STR-OAPLUG sy-vline 
WA_CACS_OAWL_STR-RFCDEST sy-vline 
WA_CACS_OAWL_STR-CLNTAPPL sy-vline 
WA_CACS_OAWL_STR-OAWLDID sy-vline 
WA_CACS_OAWL_STR-OASCID sy-vline 
WA_CACS_OAWL_STR-IMPLCL sy-vline 
WA_CACS_OAWL_STR-OBJTD sy-vline 
WA_CACS_OAWL_STR-TOBJTD sy-vline 
WA_CACS_OAWL_STR-OARUID sy-vline 
WA_CACS_OAWL_STR-OATYID sy-vline 
WA_CACS_OAWL_STR-OAPDP sy-vline 
WA_CACS_OAWL_STR-MCODE sy-vline 
WA_CACS_OAWL_STR-CTXTPARGUID sy-vline 
WA_CACS_OAWL_STR-OSELSTRUCT sy-vline 
WA_CACS_OAWL_STR-OSELMETH sy-vline 
WA_CACS_OAWL_STR-OSELREP sy-vline 
WA_CACS_OAWL_STR-OSELVAR sy-vline 
WA_CACS_OAWL_STR-TSELSTRUCT sy-vline 
WA_CACS_OAWL_STR-TSELMETH sy-vline 
WA_CACS_OAWL_STR-TSELREP sy-vline 
WA_CACS_OAWL_STR-TSELVAR sy-vline 
WA_CACS_OAWL_STR-PARSTRUCT sy-vline 
WA_CACS_OAWL_STR-PARREP sy-vline 
WA_CACS_OAWL_STR-PARVAR sy-vline 
WA_CACS_OAWL_STR-CTXTSTRUCT sy-vline 
WA_CACS_OAWL_STR-CTXTMETH sy-vline 
WA_CACS_OAWL_STR-CTXTREP sy-vline 
WA_CACS_OAWL_STR-CTXTVAR sy-vline 
WA_CACS_OAWL_STR-NXTOAGRP sy-vline 
WA_CACS_OAWL_STR-CREUSR sy-vline 
WA_CACS_OAWL_STR-CREDAT sy-vline 
WA_CACS_OAWL_STR-CRETIM sy-vline 
WA_CACS_OAWL_STR-OALOGEXT sy-vline 
WA_CACS_OAWL_STR-OASTATUS sy-vline 
WA_CACS_OAWL_STR-LTLOCK sy-vline 
WA_CACS_OAWL_STR-LNGTXTID sy-vline 
WA_CACS_OAWL_STR-TXTSPRAS sy-vline 
WA_CACS_OAWL_STR-DESCR sy-vline 
WA_CACS_OAWL_STR-CHG_TCODE sy-vline 
WA_CACS_OAWL_STR-CHG_USR sy-vline 
WA_CACS_OAWL_STR-CHG_DAT sy-vline 
WA_CACS_OAWL_STR-CHG_TIM sy-vline      INTO ld_text SEPARATED BY SPACE.

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