ABAP Select data from SAP table J_3RFGTD_DOC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_3RFGTD_DOC 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 J_3RFGTD_DOC. 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 J_3RFGTD_DOC 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_J_3RFGTD_DOC TYPE STANDARD TABLE OF J_3RFGTD_DOC,
      WA_J_3RFGTD_DOC TYPE J_3RFGTD_DOC,
      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: <J_3RFGTD_DOC> TYPE J_3RFGTD_DOC.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_3RFGTD_DOC.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_3RFGTD_DOC
  INTO TABLE IT_J_3RFGTD_DOC.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_3RFGTD_DOC
*  INTO TABLE @DATA(IT_J_3RFGTD_DOC2).
*--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_J_3RFGTD_DOC INDEX 1 INTO DATA(WA_J_3RFGTD_DOC2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_3RFGTD_DOC ASSIGNING <J_3RFGTD_DOC>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_3RFGTD_DOC>-GTDPOS = 1.
<J_3RFGTD_DOC>-ISSUEDAT = 1.
<J_3RFGTD_DOC>-ORDERNUM = 1.
<J_3RFGTD_DOC>-ORDERPOS = 1.
<J_3RFGTD_DOC>-INDELNUM = 1.

ENDLOOP.

LOOP AT IT_J_3RFGTD_DOC INTO WA_J_3RFGTD_DOC.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_3RFGTD_DOC-INDELPOS, sy-vline,
  WA_J_3RFGTD_DOC-MMDOCNUM, sy-vline,
  WA_J_3RFGTD_DOC-MMDOCJAHR, sy-vline,
  WA_J_3RFGTD_DOC-MMDOCPOS, sy-vline,
  WA_J_3RFGTD_DOC-BILLREF, sy-vline,
  WA_J_3RFGTD_DOC-HERKL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_3RFGTD_DOC 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_J_3RFGTD_DOC 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_J_3RFGTD_DOC INTO WA_J_3RFGTD_DOC.


*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 ORDERNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RFGTD_DOC-ORDERNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RFGTD_DOC-ORDERNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field INDELNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RFGTD_DOC-INDELNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RFGTD_DOC-INDELNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MMDOCNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RFGTD_DOC-MMDOCNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RFGTD_DOC-MMDOCNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field MMDOCJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_J_3RFGTD_DOC-MMDOCJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RFGTD_DOC-MMDOCJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BILLREF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RFGTD_DOC-BILLREF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RFGTD_DOC-BILLREF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_J_3RFGTD_DOC-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RFGTD_DOC-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_3RFGTD_DOC-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RFGTD_DOC-MEINS.
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_J_3RFGTD_DOC_STR, 
GTDPOS TYPE STRING,
ISSUEDAT TYPE STRING,
ORDERNUM TYPE STRING,
ORDERPOS TYPE STRING,
INDELNUM TYPE STRING,
INDELPOS TYPE STRING,
MMDOCNUM TYPE STRING,
MMDOCJAHR TYPE STRING,
MMDOCPOS TYPE STRING,
BILLREF TYPE STRING,
HERKL TYPE STRING,
MATNR TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_3RFGTD_DOC_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_J_3RFGTD_DOC_STR-GTDPOS sy-vline 
WA_J_3RFGTD_DOC_STR-ISSUEDAT sy-vline 
WA_J_3RFGTD_DOC_STR-ORDERNUM sy-vline 
WA_J_3RFGTD_DOC_STR-ORDERPOS sy-vline 
WA_J_3RFGTD_DOC_STR-INDELNUM sy-vline 
WA_J_3RFGTD_DOC_STR-INDELPOS sy-vline 
WA_J_3RFGTD_DOC_STR-MMDOCNUM sy-vline 
WA_J_3RFGTD_DOC_STR-MMDOCJAHR sy-vline 
WA_J_3RFGTD_DOC_STR-MMDOCPOS sy-vline 
WA_J_3RFGTD_DOC_STR-BILLREF sy-vline 
WA_J_3RFGTD_DOC_STR-HERKL sy-vline 
WA_J_3RFGTD_DOC_STR-MATNR sy-vline 
WA_J_3RFGTD_DOC_STR-MENGE sy-vline 
WA_J_3RFGTD_DOC_STR-MEINS sy-vline      INTO ld_text SEPARATED BY SPACE.

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