ABAP Select data from SAP table EDOC_GR_CAT_C into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EDOC_GR_CAT_C
*  INTO TABLE @DATA(IT_EDOC_GR_CAT_C2).
*--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_EDOC_GR_CAT_C INDEX 1 INTO DATA(WA_EDOC_GR_CAT_C2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EDOC_GR_CAT_C>-HKONT = 1.
<EDOC_GR_CAT_C>-GJAHR = 1.
<EDOC_GR_CAT_C>-BELNR = 1.
<EDOC_GR_CAT_C>-MWSKZ = 1.
<EDOC_GR_CAT_C>-BLART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EDOC_GR_CAT_C-BUDAT, sy-vline,
  WA_EDOC_GR_CAT_C-BLDAT, sy-vline,
  WA_EDOC_GR_CAT_C-KOART, sy-vline,
  WA_EDOC_GR_CAT_C-SHKZG, sy-vline,
  WA_EDOC_GR_CAT_C-RLDNR, sy-vline,
  WA_EDOC_GR_CAT_C-RYEAR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EDOC_GR_CAT_C 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_EDOC_GR_CAT_C 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_EDOC_GR_CAT_C INTO WA_EDOC_GR_CAT_C.


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

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

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

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

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

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

*Conversion exit AU132, internal->external for field WRBTR
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_EDOC_GR_CAT_C-WRBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EDOC_GR_CAT_C-WRBTR.
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_EDOC_GR_CAT_C_STR, 
HKONT TYPE STRING,
GJAHR TYPE STRING,
BELNR TYPE STRING,
MWSKZ TYPE STRING,
BLART TYPE STRING,
BUDAT TYPE STRING,
BLDAT TYPE STRING,
KOART TYPE STRING,
SHKZG TYPE STRING,
RLDNR TYPE STRING,
RYEAR TYPE STRING,
DMBTR TYPE STRING,
WRBTR TYPE STRING,
HWAER TYPE STRING,
WAERS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EDOC_GR_CAT_C_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_EDOC_GR_CAT_C_STR-HKONT sy-vline 
WA_EDOC_GR_CAT_C_STR-GJAHR sy-vline 
WA_EDOC_GR_CAT_C_STR-BELNR sy-vline 
WA_EDOC_GR_CAT_C_STR-MWSKZ sy-vline 
WA_EDOC_GR_CAT_C_STR-BLART sy-vline 
WA_EDOC_GR_CAT_C_STR-BUDAT sy-vline 
WA_EDOC_GR_CAT_C_STR-BLDAT sy-vline 
WA_EDOC_GR_CAT_C_STR-KOART sy-vline 
WA_EDOC_GR_CAT_C_STR-SHKZG sy-vline 
WA_EDOC_GR_CAT_C_STR-RLDNR sy-vline 
WA_EDOC_GR_CAT_C_STR-RYEAR sy-vline 
WA_EDOC_GR_CAT_C_STR-DMBTR sy-vline 
WA_EDOC_GR_CAT_C_STR-WRBTR sy-vline 
WA_EDOC_GR_CAT_C_STR-HWAER sy-vline 
WA_EDOC_GR_CAT_C_STR-WAERS sy-vline      INTO ld_text SEPARATED BY SPACE.

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