ABAP Select data from SAP table RESAB into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RESAB 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 RESAB. 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 RESAB 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_RESAB TYPE STANDARD TABLE OF RESAB,
      WA_RESAB TYPE RESAB,
      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: <RESAB> TYPE RESAB.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RESAB
*  INTO TABLE @DATA(IT_RESAB2).
*--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_RESAB INDEX 1 INTO DATA(WA_RESAB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RESAB>-MANDT = 1.
<RESAB>-REFBLNR = 1.
<RESAB>-REFBPOS = 1.
<RESAB>-REFBTYP = 1.
<RESAB>-BUKRS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RESAB-BELNR, sy-vline,
  WA_RESAB-EBELN, sy-vline,
  WA_RESAB-EBELP, sy-vline,
  WA_RESAB-ZEKKN, sy-vline,
  WA_RESAB-GJAHR, sy-vline,
  WA_RESAB-BUZEI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RESAB 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_RESAB 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_RESAB INTO WA_RESAB.


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

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

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

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RESAB-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RESAB-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field KURSF
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_RESAB-KURSF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RESAB-KURSF.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field AWSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RESAB-AWSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RESAB-AWSYS.
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_RESAB_STR, 
MANDT TYPE STRING,
REFBLNR TYPE STRING,
REFBPOS TYPE STRING,
REFBTYP TYPE STRING,
BUKRS TYPE STRING,
BELNR TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
ZEKKN TYPE STRING,
GJAHR TYPE STRING,
BUZEI TYPE STRING,
SHKZG TYPE STRING,
WAERS TYPE STRING,
WRBTR TYPE STRING,
HWAER TYPE STRING,
DMBTR TYPE STRING,
KURSF TYPE STRING,
WWERT TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
REFBLNROLD TYPE STRING,
REFBPOSOLD TYPE STRING,
ERLKZ TYPE STRING,
ONACCKZ TYPE STRING,
AWTYP TYPE STRING,
AWREF TYPE STRING,
AWORG TYPE STRING,
AWSYS TYPE STRING,
AWPOS TYPE STRING,
TCODE TYPE STRING,
VRGNG TYPE STRING,
ATEXT TYPE STRING,
TRANSDAT TYPE STRING,
TRANSPER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RESAB_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_RESAB_STR-MANDT sy-vline 
WA_RESAB_STR-REFBLNR sy-vline 
WA_RESAB_STR-REFBPOS sy-vline 
WA_RESAB_STR-REFBTYP sy-vline 
WA_RESAB_STR-BUKRS sy-vline 
WA_RESAB_STR-BELNR sy-vline 
WA_RESAB_STR-EBELN sy-vline 
WA_RESAB_STR-EBELP sy-vline 
WA_RESAB_STR-ZEKKN sy-vline 
WA_RESAB_STR-GJAHR sy-vline 
WA_RESAB_STR-BUZEI sy-vline 
WA_RESAB_STR-SHKZG sy-vline 
WA_RESAB_STR-WAERS sy-vline 
WA_RESAB_STR-WRBTR sy-vline 
WA_RESAB_STR-HWAER sy-vline 
WA_RESAB_STR-DMBTR sy-vline 
WA_RESAB_STR-KURSF sy-vline 
WA_RESAB_STR-WWERT sy-vline 
WA_RESAB_STR-BLDAT sy-vline 
WA_RESAB_STR-BUDAT sy-vline 
WA_RESAB_STR-REFBLNROLD sy-vline 
WA_RESAB_STR-REFBPOSOLD sy-vline 
WA_RESAB_STR-ERLKZ sy-vline 
WA_RESAB_STR-ONACCKZ sy-vline 
WA_RESAB_STR-AWTYP sy-vline 
WA_RESAB_STR-AWREF sy-vline 
WA_RESAB_STR-AWORG sy-vline 
WA_RESAB_STR-AWSYS sy-vline 
WA_RESAB_STR-AWPOS sy-vline 
WA_RESAB_STR-TCODE sy-vline 
WA_RESAB_STR-VRGNG sy-vline 
WA_RESAB_STR-ATEXT sy-vline 
WA_RESAB_STR-TRANSDAT sy-vline 
WA_RESAB_STR-TRANSPER sy-vline      INTO ld_text SEPARATED BY SPACE.

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