ABAP Select data from SAP table GRPCRTA_S_MG3FIINVPOST01T1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP GRPCRTA_S_MG3FIINVPOST01T1 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 GRPCRTA_S_MG3FIINVPOST01T1. 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 GRPCRTA_S_MG3FIINVPOST01T1 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_GRPCRTA_S_MG3FIINVPOST01T1 TYPE STANDARD TABLE OF GRPCRTA_S_MG3FIINVPOST01T1,
      WA_GRPCRTA_S_MG3FIINVPOST01T1 TYPE GRPCRTA_S_MG3FIINVPOST01T1,
      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: <GRPCRTA_S_MG3FIINVPOST01T1> TYPE GRPCRTA_S_MG3FIINVPOST01T1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_GRPCRTA_S_MG3FIINVPOST01T1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM GRPCRTA_S_MG3FIINVPOST01T1
  INTO TABLE IT_GRPCRTA_S_MG3FIINVPOST01T1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GRPCRTA_S_MG3FIINVPOST01T1
*  INTO TABLE @DATA(IT_GRPCRTA_S_MG3FIINVPOST01T12).
*--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_GRPCRTA_S_MG3FIINVPOST01T1 INDEX 1 INTO DATA(WA_GRPCRTA_S_MG3FIINVPOST01T12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_GRPCRTA_S_MG3FIINVPOST01T1 ASSIGNING <GRPCRTA_S_MG3FIINVPOST01T1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GRPCRTA_S_MG3FIINVPOST01T1>-GRPCRTA_SEQ = 1.
<GRPCRTA_S_MG3FIINVPOST01T1>-DEFTYPE = 1.
<GRPCRTA_S_MG3FIINVPOST01T1>-BSIK_DMBTR = 1.
<GRPCRTA_S_MG3FIINVPOST01T1>-DEFDESC = 1.
<GRPCRTA_S_MG3FIINVPOST01T1>-BUKRS = 1.

ENDLOOP.

LOOP AT IT_GRPCRTA_S_MG3FIINVPOST01T1 INTO WA_GRPCRTA_S_MG3FIINVPOST01T1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GRPCRTA_S_MG3FIINVPOST01T1-BUTXT, sy-vline,
  WA_GRPCRTA_S_MG3FIINVPOST01T1-LIFNR, sy-vline,
  WA_GRPCRTA_S_MG3FIINVPOST01T1-NAME1, sy-vline,
  WA_GRPCRTA_S_MG3FIINVPOST01T1-BLDAT, sy-vline,
  WA_GRPCRTA_S_MG3FIINVPOST01T1-XBLNR, sy-vline,
  WA_GRPCRTA_S_MG3FIINVPOST01T1-ACNUM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GRPCRTA_S_MG3FIINVPOST01T1 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_GRPCRTA_S_MG3FIINVPOST01T1 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_GRPCRTA_S_MG3FIINVPOST01T1 INTO WA_GRPCRTA_S_MG3FIINVPOST01T1.


*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 AU132, internal->external for field BSIK_DMBTR
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_GRPCRTA_S_MG3FIINVPOST01T1-BSIK_DMBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GRPCRTA_S_MG3FIINVPOST01T1-BSIK_DMBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GRPCRTA_S_MG3FIINVPOST01T1-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GRPCRTA_S_MG3FIINVPOST01T1-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ACNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GRPCRTA_S_MG3FIINVPOST01T1-ACNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GRPCRTA_S_MG3FIINVPOST01T1-ACNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GRPCRTA_S_MG3FIINVPOST01T1-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GRPCRTA_S_MG3FIINVPOST01T1-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field DMBTR
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_GRPCRTA_S_MG3FIINVPOST01T1-DMBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GRPCRTA_S_MG3FIINVPOST01T1-DMBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_GRPCRTA_S_MG3FIINVPOST01T1-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GRPCRTA_S_MG3FIINVPOST01T1-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field HKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GRPCRTA_S_MG3FIINVPOST01T1-HKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GRPCRTA_S_MG3FIINVPOST01T1-HKONT.
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_GRPCRTA_S_MG3FIINVPOST01T1_STR, 
GRPCRTA_SEQ TYPE STRING,
DEFTYPE TYPE STRING,
BSIK_DMBTR TYPE STRING,
DEFDESC TYPE STRING,
BUKRS TYPE STRING,
BUTXT TYPE STRING,
LIFNR TYPE STRING,
NAME1 TYPE STRING,
BLDAT TYPE STRING,
XBLNR TYPE STRING,
ACNUM TYPE STRING,
ACDES TYPE STRING,
BLART TYPE STRING,
LTEXT TYPE STRING,
SGTXT TYPE STRING,
BELNR TYPE STRING,
DMBTR TYPE STRING,
BUDAT TYPE STRING,
RFPRO TYPE STRING,
RULE_MAXBT TYPE STRING,
MAXBT TYPE STRING,
MONAT TYPE STRING,
GJAHR TYPE STRING,
ZUONR TYPE STRING,
BSCHL TYPE STRING,
WAERS TYPE STRING,
SHTXT TYPE STRING,
USNAM TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,
HKONT TYPE STRING,
TOT_DMBTR TYPE STRING,
MAXBT_T043T TYPE STRING,
XNETB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GRPCRTA_S_MG3FIINVPOST01T1_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_GRPCRTA_S_MG3FIINVPOST01T1_STR-GRPCRTA_SEQ sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-DEFTYPE sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-BSIK_DMBTR sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-DEFDESC sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-BUKRS sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-BUTXT sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-LIFNR sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-NAME1 sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-BLDAT sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-XBLNR sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-ACNUM sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-ACDES sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-BLART sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-LTEXT sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-SGTXT sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-BELNR sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-DMBTR sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-BUDAT sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-RFPRO sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-RULE_MAXBT sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-MAXBT sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-MONAT sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-GJAHR sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-ZUONR sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-BSCHL sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-WAERS sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-SHTXT sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-USNAM sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-CPUDT sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-CPUTM sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-HKONT sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-TOT_DMBTR sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-MAXBT_T043T sy-vline 
WA_GRPCRTA_S_MG3FIINVPOST01T1_STR-XNETB sy-vline      INTO ld_text SEPARATED BY SPACE.

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