ABAP Select data from SAP table J_3GBELEGA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_3GBELEGA 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_3GBELEGA. 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_3GBELEGA 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_3GBELEGA TYPE STANDARD TABLE OF J_3GBELEGA,
      WA_J_3GBELEGA TYPE J_3GBELEGA,
      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_3GBELEGA> TYPE J_3GBELEGA.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_3GBELEGA.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_3GBELEGA
  INTO TABLE IT_J_3GBELEGA.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_3GBELEGA
*  INTO TABLE @DATA(IT_J_3GBELEGA2).
*--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_3GBELEGA INDEX 1 INTO DATA(WA_J_3GBELEGA2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_3GBELEGA ASSIGNING <J_3GBELEGA>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_3GBELEGA>-J_3GEMPREF = 1.
<J_3GBELEGA>-J_3GEMPPSP = 1.
<J_3GBELEGA>-J_3GEMPPRO = 1.
<J_3GBELEGA>-J_3GEMPKOS = 1.
<J_3GBELEGA>-J_3GEMPKOK = 1.

ENDLOOP.

LOOP AT IT_J_3GBELEGA INTO WA_J_3GBELEGA.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_3GBELEGA-J_3GEMPACO, sy-vline,
  WA_J_3GBELEGA-J_3GEMPAPM, sy-vline,
  WA_J_3GBELEGA-J_3GEMPWRK, sy-vline,
  WA_J_3GBELEGA-J_3GEMPLAG, sy-vline,
  WA_J_3GBELEGA-J_3GEMPEXT, sy-vline,
  WA_J_3GBELEGA-J_3GEMPDEB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_3GBELEGA 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_3GBELEGA 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_3GBELEGA INTO WA_J_3GBELEGA.


*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 ABPSP, internal->external for field J_3GEMPPSP
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_J_3GBELEGA-J_3GEMPPSP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3GBELEGA-J_3GEMPPSP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit KONPD, internal->external for field J_3GEMPPRO
CALL FUNCTION 'CONVERSION_EXIT_KONPD_OUTPUT'
  EXPORTING
    input =                      WA_J_3GBELEGA-J_3GEMPPRO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3GBELEGA-J_3GEMPPRO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field J_3GEMPKOS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3GBELEGA-J_3GEMPKOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3GBELEGA-J_3GEMPKOS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field J_3GEMPACO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3GBELEGA-J_3GEMPACO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3GBELEGA-J_3GEMPACO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field J_3GEMPAPM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3GBELEGA-J_3GEMPAPM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3GBELEGA-J_3GEMPAPM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field J_3GEMPEXT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3GBELEGA-J_3GEMPEXT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3GBELEGA-J_3GEMPEXT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field J_3GEMPDEB
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3GBELEGA-J_3GEMPDEB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3GBELEGA-J_3GEMPDEB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field J_3GMITTLE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3GBELEGA-J_3GMITTLE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3GBELEGA-J_3GMITTLE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field J_3GMITPSP
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_J_3GBELEGA-J_3GMITPSP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3GBELEGA-J_3GMITPSP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit KONPD, internal->external for field J_3GMITPRO
CALL FUNCTION 'CONVERSION_EXIT_KONPD_OUTPUT'
  EXPORTING
    input =                      WA_J_3GBELEGA-J_3GMITPRO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3GBELEGA-J_3GMITPRO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field J_3GMITKOS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3GBELEGA-J_3GMITKOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3GBELEGA-J_3GMITKOS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field J_3GMITACO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3GBELEGA-J_3GMITACO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3GBELEGA-J_3GMITACO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field J_3GMITAPM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3GBELEGA-J_3GMITAPM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3GBELEGA-J_3GMITAPM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field J_3GEMPPER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3GBELEGA-J_3GEMPPER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3GBELEGA-J_3GEMPPER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EQUNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3GBELEGA-EQUNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3GBELEGA-EQUNR.
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_3GBELEGA_STR, 
J_3GEMPREF TYPE STRING,
J_3GEMPPSP TYPE STRING,
J_3GEMPPRO TYPE STRING,
J_3GEMPKOS TYPE STRING,
J_3GEMPKOK TYPE STRING,
J_3GEMPACO TYPE STRING,
J_3GEMPAPM TYPE STRING,
J_3GEMPWRK TYPE STRING,
J_3GEMPLAG TYPE STRING,
J_3GEMPEXT TYPE STRING,
J_3GEMPDEB TYPE STRING,
J_3GMITTLE TYPE STRING,
J_3GMITREF TYPE STRING,
J_3GMITPSP TYPE STRING,
J_3GMITPRO TYPE STRING,
J_3GMITKOS TYPE STRING,
J_3GMITKOK TYPE STRING,
J_3GMITACO TYPE STRING,
J_3GMITAPM TYPE STRING,
J_3GMITWRK TYPE STRING,
J_3GMITLAG TYPE STRING,
J_3GFREMDP TYPE STRING,
PERNR TYPE STRING,
NACHN TYPE STRING,
J_3GEMPPER TYPE STRING,
J_3GBELSTA TYPE STRING,
J_3GPIABS TYPE STRING,
J_3GPEABS TYPE STRING,
J_3GPIEMPF TYPE STRING,
J_3GPEEMPS TYPE STRING,
J_3GBETR1 TYPE STRING,
J_3GBETR2 TYPE STRING,
J_3GBETR3 TYPE STRING,
J_3GBETR4 TYPE STRING,
J_3GWAERS1 TYPE STRING,
J_3GWAERS2 TYPE STRING,
J_3GWAERS3 TYPE STRING,
J_3GWAERS4 TYPE STRING,
J_3GFAKTAB TYPE STRING,
J_3GFAKTEM TYPE STRING,
EQUNR TYPE STRING,
J_3GTPLKZ TYPE STRING,
J_3GKATNRC TYPE STRING,
LFDNR TYPE STRING,
J_3GDOMLMB TYPE STRING,
J_3GDOMMB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_3GBELEGA_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_3GBELEGA_STR-J_3GEMPREF sy-vline 
WA_J_3GBELEGA_STR-J_3GEMPPSP sy-vline 
WA_J_3GBELEGA_STR-J_3GEMPPRO sy-vline 
WA_J_3GBELEGA_STR-J_3GEMPKOS sy-vline 
WA_J_3GBELEGA_STR-J_3GEMPKOK sy-vline 
WA_J_3GBELEGA_STR-J_3GEMPACO sy-vline 
WA_J_3GBELEGA_STR-J_3GEMPAPM sy-vline 
WA_J_3GBELEGA_STR-J_3GEMPWRK sy-vline 
WA_J_3GBELEGA_STR-J_3GEMPLAG sy-vline 
WA_J_3GBELEGA_STR-J_3GEMPEXT sy-vline 
WA_J_3GBELEGA_STR-J_3GEMPDEB sy-vline 
WA_J_3GBELEGA_STR-J_3GMITTLE sy-vline 
WA_J_3GBELEGA_STR-J_3GMITREF sy-vline 
WA_J_3GBELEGA_STR-J_3GMITPSP sy-vline 
WA_J_3GBELEGA_STR-J_3GMITPRO sy-vline 
WA_J_3GBELEGA_STR-J_3GMITKOS sy-vline 
WA_J_3GBELEGA_STR-J_3GMITKOK sy-vline 
WA_J_3GBELEGA_STR-J_3GMITACO sy-vline 
WA_J_3GBELEGA_STR-J_3GMITAPM sy-vline 
WA_J_3GBELEGA_STR-J_3GMITWRK sy-vline 
WA_J_3GBELEGA_STR-J_3GMITLAG sy-vline 
WA_J_3GBELEGA_STR-J_3GFREMDP sy-vline 
WA_J_3GBELEGA_STR-PERNR sy-vline 
WA_J_3GBELEGA_STR-NACHN sy-vline 
WA_J_3GBELEGA_STR-J_3GEMPPER sy-vline 
WA_J_3GBELEGA_STR-J_3GBELSTA sy-vline 
WA_J_3GBELEGA_STR-J_3GPIABS sy-vline 
WA_J_3GBELEGA_STR-J_3GPEABS sy-vline 
WA_J_3GBELEGA_STR-J_3GPIEMPF sy-vline 
WA_J_3GBELEGA_STR-J_3GPEEMPS sy-vline 
WA_J_3GBELEGA_STR-J_3GBETR1 sy-vline 
WA_J_3GBELEGA_STR-J_3GBETR2 sy-vline 
WA_J_3GBELEGA_STR-J_3GBETR3 sy-vline 
WA_J_3GBELEGA_STR-J_3GBETR4 sy-vline 
WA_J_3GBELEGA_STR-J_3GWAERS1 sy-vline 
WA_J_3GBELEGA_STR-J_3GWAERS2 sy-vline 
WA_J_3GBELEGA_STR-J_3GWAERS3 sy-vline 
WA_J_3GBELEGA_STR-J_3GWAERS4 sy-vline 
WA_J_3GBELEGA_STR-J_3GFAKTAB sy-vline 
WA_J_3GBELEGA_STR-J_3GFAKTEM sy-vline 
WA_J_3GBELEGA_STR-EQUNR sy-vline 
WA_J_3GBELEGA_STR-J_3GTPLKZ sy-vline 
WA_J_3GBELEGA_STR-J_3GKATNRC sy-vline 
WA_J_3GBELEGA_STR-LFDNR sy-vline 
WA_J_3GBELEGA_STR-J_3GDOMLMB sy-vline 
WA_J_3GBELEGA_STR-J_3GDOMMB sy-vline      INTO ld_text SEPARATED BY SPACE.

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