ABAP Select data from SAP table J_3GKOMJA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_3GKOMJA 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_3GKOMJA. 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_3GKOMJA 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_3GKOMJA TYPE STANDARD TABLE OF J_3GKOMJA,
      WA_J_3GKOMJA TYPE J_3GKOMJA,
      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_3GKOMJA> TYPE J_3GKOMJA.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_3GKOMJA.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_3GKOMJA
  INTO TABLE IT_J_3GKOMJA.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_3GKOMJA
*  INTO TABLE @DATA(IT_J_3GKOMJA2).
*--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_3GKOMJA INDEX 1 INTO DATA(WA_J_3GKOMJA2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_3GKOMJA ASSIGNING <J_3GKOMJA>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_3GKOMJA>-EQUNR = 1.
<J_3GKOMJA>-EQART = 1.
<J_3GKOMJA>-J_3GKZMENG = 1.
<J_3GKOMJA>-J_3GKZLADG = 1.
<J_3GKOMJA>-J_3GKZLAD = 1.

ENDLOOP.

LOOP AT IT_J_3GKOMJA INTO WA_J_3GKOMJA.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_3GKOMJA-J_3GKZBERG, sy-vline,
  WA_J_3GKOMJA-J_3GEIGNER, sy-vline,
  WA_J_3GKOMJA-J_3GVERWAL, sy-vline,
  WA_J_3GKOMJA-J_3GEIFR, sy-vline,
  WA_J_3GKOMJA-J_3GBLTYP, sy-vline,
  WA_J_3GKOMJA-J_3GPRGRPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_3GKOMJA 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_3GKOMJA 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_3GKOMJA INTO WA_J_3GKOMJA.


*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 EQUNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3GKOMJA-EQUNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3GKOMJA-EQUNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field J_3GSEMPST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3GKOMJA-J_3GSEMPST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3GKOMJA-J_3GSEMPST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field J_3GDEMPST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3GKOMJA-J_3GDEMPST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3GKOMJA-J_3GDEMPST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field J_3GLPRC01
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3GKOMJA-J_3GLPRC01
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3GKOMJA-J_3GLPRC01.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field J_3GBPRC01
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3GKOMJA-J_3GBPRC01
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3GKOMJA-J_3GBPRC01.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field J_3GPEMPST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3GKOMJA-J_3GPEMPST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3GKOMJA-J_3GPEMPST.
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_3GKOMJA_STR, 
EQUNR TYPE STRING,
EQART TYPE STRING,
J_3GKZMENG TYPE STRING,
J_3GKZLADG TYPE STRING,
J_3GKZLAD TYPE STRING,
J_3GKZBERG TYPE STRING,
J_3GEIGNER TYPE STRING,
J_3GVERWAL TYPE STRING,
J_3GEIFR TYPE STRING,
J_3GBLTYP TYPE STRING,
J_3GPRGRPE TYPE STRING,
J_3GTPLKZ TYPE STRING,
J_3GPACHT TYPE STRING,
J_3GETYPA TYPE STRING,
J_3GETYPE TYPE STRING,
J_3GSEMPST TYPE STRING,
J_3GDEMPST TYPE STRING,
J_3GLGSBER TYPE STRING,
J_3GLBUKRS TYPE STRING,
J_3GLWERKS TYPE STRING,
J_3GBGSBER TYPE STRING,
J_3GBBUKRS TYPE STRING,
J_3GBWERKS TYPE STRING,
J_3GLKOKRS TYPE STRING,
J_3GBKOKRS TYPE STRING,
J_3GLPRC01 TYPE STRING,
J_3GBPRC01 TYPE STRING,
J_3GCALID TYPE STRING,
J_3GVMONAT TYPE STRING,
J_3GABRART TYPE STRING,
J_3GDATVO TYPE STRING,
J_3GDATBI TYPE STRING,
J_3GTAGMON TYPE STRING,
J_3GBEWEG TYPE STRING,
J_3GABTAGM TYPE STRING,
J_3GORGUEB TYPE STRING,
J_3GSTDTAG TYPE STRING,
J_3GSTDMON TYPE STRING,
J_3GKATGR1 TYPE STRING,
J_3GKATGR2 TYPE STRING,
J_3GPEMPST TYPE STRING,
J_3GLVART TYPE STRING,
J_3GKATNRC TYPE STRING,
J_3GASTLNR TYPE STRING,
USR00 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_3GKOMJA_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_3GKOMJA_STR-EQUNR sy-vline 
WA_J_3GKOMJA_STR-EQART sy-vline 
WA_J_3GKOMJA_STR-J_3GKZMENG sy-vline 
WA_J_3GKOMJA_STR-J_3GKZLADG sy-vline 
WA_J_3GKOMJA_STR-J_3GKZLAD sy-vline 
WA_J_3GKOMJA_STR-J_3GKZBERG sy-vline 
WA_J_3GKOMJA_STR-J_3GEIGNER sy-vline 
WA_J_3GKOMJA_STR-J_3GVERWAL sy-vline 
WA_J_3GKOMJA_STR-J_3GEIFR sy-vline 
WA_J_3GKOMJA_STR-J_3GBLTYP sy-vline 
WA_J_3GKOMJA_STR-J_3GPRGRPE sy-vline 
WA_J_3GKOMJA_STR-J_3GTPLKZ sy-vline 
WA_J_3GKOMJA_STR-J_3GPACHT sy-vline 
WA_J_3GKOMJA_STR-J_3GETYPA sy-vline 
WA_J_3GKOMJA_STR-J_3GETYPE sy-vline 
WA_J_3GKOMJA_STR-J_3GSEMPST sy-vline 
WA_J_3GKOMJA_STR-J_3GDEMPST sy-vline 
WA_J_3GKOMJA_STR-J_3GLGSBER sy-vline 
WA_J_3GKOMJA_STR-J_3GLBUKRS sy-vline 
WA_J_3GKOMJA_STR-J_3GLWERKS sy-vline 
WA_J_3GKOMJA_STR-J_3GBGSBER sy-vline 
WA_J_3GKOMJA_STR-J_3GBBUKRS sy-vline 
WA_J_3GKOMJA_STR-J_3GBWERKS sy-vline 
WA_J_3GKOMJA_STR-J_3GLKOKRS sy-vline 
WA_J_3GKOMJA_STR-J_3GBKOKRS sy-vline 
WA_J_3GKOMJA_STR-J_3GLPRC01 sy-vline 
WA_J_3GKOMJA_STR-J_3GBPRC01 sy-vline 
WA_J_3GKOMJA_STR-J_3GCALID sy-vline 
WA_J_3GKOMJA_STR-J_3GVMONAT sy-vline 
WA_J_3GKOMJA_STR-J_3GABRART sy-vline 
WA_J_3GKOMJA_STR-J_3GDATVO sy-vline 
WA_J_3GKOMJA_STR-J_3GDATBI sy-vline 
WA_J_3GKOMJA_STR-J_3GTAGMON sy-vline 
WA_J_3GKOMJA_STR-J_3GBEWEG sy-vline 
WA_J_3GKOMJA_STR-J_3GABTAGM sy-vline 
WA_J_3GKOMJA_STR-J_3GORGUEB sy-vline 
WA_J_3GKOMJA_STR-J_3GSTDTAG sy-vline 
WA_J_3GKOMJA_STR-J_3GSTDMON sy-vline 
WA_J_3GKOMJA_STR-J_3GKATGR1 sy-vline 
WA_J_3GKOMJA_STR-J_3GKATGR2 sy-vline 
WA_J_3GKOMJA_STR-J_3GPEMPST sy-vline 
WA_J_3GKOMJA_STR-J_3GLVART sy-vline 
WA_J_3GKOMJA_STR-J_3GKATNRC sy-vline 
WA_J_3GKOMJA_STR-J_3GASTLNR sy-vline 
WA_J_3GKOMJA_STR-USR00 sy-vline      INTO ld_text SEPARATED BY SPACE.

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