ABAP Select data from SAP table GRPC_S_QUERY_COLUMN_WO_DESC into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GRPC_S_QUERY_COLUMN_WO_DESC
*  INTO TABLE @DATA(IT_GRPC_S_QUERY_COLUMN_WO_DESC2).
*--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_GRPC_S_QUERY_COLUMN_WO_DESC INDEX 1 INTO DATA(WA_GRPC_S_QUERY_COLUMN_WO_DESC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GRPC_S_QUERY_COLUMN_WO_DESC>-FPOS = 1.
<GRPC_S_QUERY_COLUMN_WO_DESC>-KIND = 1.
<GRPC_S_QUERY_COLUMN_WO_DESC>-SPNAME = 1.
<GRPC_S_QUERY_COLUMN_WO_DESC>-FNAME = 1.
<GRPC_S_QUERY_COLUMN_WO_DESC>-STDSEL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GRPC_S_QUERY_COLUMN_WO_DESC-TYPE, sy-vline,
  WA_GRPC_S_QUERY_COLUMN_WO_DESC-LENGTH, sy-vline,
  WA_GRPC_S_QUERY_COLUMN_WO_DESC-DISPFORMAT, sy-vline,
  WA_GRPC_S_QUERY_COLUMN_WO_DESC-NODISPLAY, sy-vline,
  WA_GRPC_S_QUERY_COLUMN_WO_DESC-OBLIGATORY, sy-vline,
  WA_GRPC_S_QUERY_COLUMN_WO_DESC-ALV_COLUMN_ID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GRPC_S_QUERY_COLUMN_WO_DESC 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_GRPC_S_QUERY_COLUMN_WO_DESC 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_GRPC_S_QUERY_COLUMN_WO_DESC INTO WA_GRPC_S_QUERY_COLUMN_WO_DESC.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_GRPC_S_QUERY_COLUMN_WO_DESC_STR, 
FPOS TYPE STRING,
KIND TYPE STRING,
SPNAME TYPE STRING,
FNAME TYPE STRING,
STDSEL TYPE STRING,
TYPE TYPE STRING,
LENGTH TYPE STRING,
DISPFORMAT TYPE STRING,
NODISPLAY TYPE STRING,
OBLIGATORY TYPE STRING,
ALV_COLUMN_ID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GRPC_S_QUERY_COLUMN_WO_DESC_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_GRPC_S_QUERY_COLUMN_WO_DESC_STR-FPOS sy-vline 
WA_GRPC_S_QUERY_COLUMN_WO_DESC_STR-KIND sy-vline 
WA_GRPC_S_QUERY_COLUMN_WO_DESC_STR-SPNAME sy-vline 
WA_GRPC_S_QUERY_COLUMN_WO_DESC_STR-FNAME sy-vline 
WA_GRPC_S_QUERY_COLUMN_WO_DESC_STR-STDSEL sy-vline 
WA_GRPC_S_QUERY_COLUMN_WO_DESC_STR-TYPE sy-vline 
WA_GRPC_S_QUERY_COLUMN_WO_DESC_STR-LENGTH sy-vline 
WA_GRPC_S_QUERY_COLUMN_WO_DESC_STR-DISPFORMAT sy-vline 
WA_GRPC_S_QUERY_COLUMN_WO_DESC_STR-NODISPLAY sy-vline 
WA_GRPC_S_QUERY_COLUMN_WO_DESC_STR-OBLIGATORY sy-vline 
WA_GRPC_S_QUERY_COLUMN_WO_DESC_STR-ALV_COLUMN_ID sy-vline      INTO ld_text SEPARATED BY SPACE.

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