ABAP Select data from SAP table CACS_S_OAWL_DB into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CACS_S_OAWL_DB 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_S_OAWL_DB. 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_S_OAWL_DB 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_S_OAWL_DB TYPE STANDARD TABLE OF CACS_S_OAWL_DB,
      WA_CACS_S_OAWL_DB TYPE CACS_S_OAWL_DB,
      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_S_OAWL_DB> TYPE CACS_S_OAWL_DB.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CACS_S_OAWL_DB
*  INTO TABLE @DATA(IT_CACS_S_OAWL_DB2).
*--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_S_OAWL_DB INDEX 1 INTO DATA(WA_CACS_S_OAWL_DB2).


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

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

ENDLOOP.

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

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


*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_S_OAWL_DB-OAWLID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CACS_S_OAWL_DB-OAWLID.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ISOLA, internal->external for field TXTSPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_CACS_S_OAWL_DB-TXTSPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CACS_S_OAWL_DB-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_S_OAWL_DB_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,
CTXTSET TYPE STRING,
OSELVPROP TYPE STRING,
OSELVVAL TYPE STRING,
TSELVPROP TYPE STRING,
TSELVVAL TYPE STRING,
PARVPROP TYPE STRING,
PARVVAL TYPE STRING,
CTXTVPROP TYPE STRING,
CTXTVVAL TYPE STRING,
UPDKNZ TYPE STRING,
NITS TYPE STRING,
SESSLOCK TYPE STRING,
ATTRRD TYPE STRING,
LNGTXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CACS_S_OAWL_DB_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_S_OAWL_DB_STR-MANDT sy-vline 
WA_CACS_S_OAWL_DB_STR-OAWLID sy-vline 
WA_CACS_S_OAWL_DB_STR-OAPLUG sy-vline 
WA_CACS_S_OAWL_DB_STR-RFCDEST sy-vline 
WA_CACS_S_OAWL_DB_STR-CLNTAPPL sy-vline 
WA_CACS_S_OAWL_DB_STR-OAWLDID sy-vline 
WA_CACS_S_OAWL_DB_STR-OASCID sy-vline 
WA_CACS_S_OAWL_DB_STR-IMPLCL sy-vline 
WA_CACS_S_OAWL_DB_STR-OBJTD sy-vline 
WA_CACS_S_OAWL_DB_STR-TOBJTD sy-vline 
WA_CACS_S_OAWL_DB_STR-OARUID sy-vline 
WA_CACS_S_OAWL_DB_STR-OATYID sy-vline 
WA_CACS_S_OAWL_DB_STR-OAPDP sy-vline 
WA_CACS_S_OAWL_DB_STR-MCODE sy-vline 
WA_CACS_S_OAWL_DB_STR-CTXTPARGUID sy-vline 
WA_CACS_S_OAWL_DB_STR-OSELSTRUCT sy-vline 
WA_CACS_S_OAWL_DB_STR-OSELMETH sy-vline 
WA_CACS_S_OAWL_DB_STR-OSELREP sy-vline 
WA_CACS_S_OAWL_DB_STR-OSELVAR sy-vline 
WA_CACS_S_OAWL_DB_STR-TSELSTRUCT sy-vline 
WA_CACS_S_OAWL_DB_STR-TSELMETH sy-vline 
WA_CACS_S_OAWL_DB_STR-TSELREP sy-vline 
WA_CACS_S_OAWL_DB_STR-TSELVAR sy-vline 
WA_CACS_S_OAWL_DB_STR-PARSTRUCT sy-vline 
WA_CACS_S_OAWL_DB_STR-PARREP sy-vline 
WA_CACS_S_OAWL_DB_STR-PARVAR sy-vline 
WA_CACS_S_OAWL_DB_STR-CTXTSTRUCT sy-vline 
WA_CACS_S_OAWL_DB_STR-CTXTMETH sy-vline 
WA_CACS_S_OAWL_DB_STR-CTXTREP sy-vline 
WA_CACS_S_OAWL_DB_STR-CTXTVAR sy-vline 
WA_CACS_S_OAWL_DB_STR-NXTOAGRP sy-vline 
WA_CACS_S_OAWL_DB_STR-CREUSR sy-vline 
WA_CACS_S_OAWL_DB_STR-CREDAT sy-vline 
WA_CACS_S_OAWL_DB_STR-CRETIM sy-vline 
WA_CACS_S_OAWL_DB_STR-OALOGEXT sy-vline 
WA_CACS_S_OAWL_DB_STR-OASTATUS sy-vline 
WA_CACS_S_OAWL_DB_STR-LTLOCK sy-vline 
WA_CACS_S_OAWL_DB_STR-LNGTXTID sy-vline 
WA_CACS_S_OAWL_DB_STR-TXTSPRAS sy-vline 
WA_CACS_S_OAWL_DB_STR-DESCR sy-vline 
WA_CACS_S_OAWL_DB_STR-CHG_TCODE sy-vline 
WA_CACS_S_OAWL_DB_STR-CHG_USR sy-vline 
WA_CACS_S_OAWL_DB_STR-CHG_DAT sy-vline 
WA_CACS_S_OAWL_DB_STR-CHG_TIM sy-vline 
WA_CACS_S_OAWL_DB_STR-CTXTSET sy-vline 
WA_CACS_S_OAWL_DB_STR-OSELVPROP sy-vline 
WA_CACS_S_OAWL_DB_STR-OSELVVAL sy-vline 
WA_CACS_S_OAWL_DB_STR-TSELVPROP sy-vline 
WA_CACS_S_OAWL_DB_STR-TSELVVAL sy-vline 
WA_CACS_S_OAWL_DB_STR-PARVPROP sy-vline 
WA_CACS_S_OAWL_DB_STR-PARVVAL sy-vline 
WA_CACS_S_OAWL_DB_STR-CTXTVPROP sy-vline 
WA_CACS_S_OAWL_DB_STR-CTXTVVAL sy-vline 
WA_CACS_S_OAWL_DB_STR-UPDKNZ sy-vline 
WA_CACS_S_OAWL_DB_STR-NITS sy-vline 
WA_CACS_S_OAWL_DB_STR-SESSLOCK sy-vline 
WA_CACS_S_OAWL_DB_STR-ATTRRD sy-vline 
WA_CACS_S_OAWL_DB_STR-LNGTXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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