ABAP Select data from SAP table JVGLFLEXKEY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM JVGLFLEXKEY
*  INTO TABLE @DATA(IT_JVGLFLEXKEY2).
*--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_JVGLFLEXKEY INDEX 1 INTO DATA(WA_JVGLFLEXKEY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<JVGLFLEXKEY>-RCLNT = 1.
<JVGLFLEXKEY>-RYEAR = 1.
<JVGLFLEXKEY>-ACTIV = 1.
<JVGLFLEXKEY>-RMVCT = 1.
<JVGLFLEXKEY>-RTCUR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_JVGLFLEXKEY-RUNIT, sy-vline,
  WA_JVGLFLEXKEY-AWTYP, sy-vline,
  WA_JVGLFLEXKEY-RLDNR, sy-vline,
  WA_JVGLFLEXKEY-RRCTY, sy-vline,
  WA_JVGLFLEXKEY-RVERS, sy-vline,
  WA_JVGLFLEXKEY-LOGSYS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_JVGLFLEXKEY 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_JVGLFLEXKEY 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_JVGLFLEXKEY INTO WA_JVGLFLEXKEY.


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

*Conversion exit CUNIT, internal->external for field RUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_JVGLFLEXKEY-RUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_JVGLFLEXKEY-RUNIT.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field RECID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_JVGLFLEXKEY-RECID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_JVGLFLEXKEY-RECID.
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_JVGLFLEXKEY_STR, 
RCLNT TYPE STRING,
RYEAR TYPE STRING,
ACTIV TYPE STRING,
RMVCT TYPE STRING,
RTCUR TYPE STRING,
RUNIT TYPE STRING,
AWTYP TYPE STRING,
RLDNR TYPE STRING,
RRCTY TYPE STRING,
RVERS TYPE STRING,
LOGSYS TYPE STRING,
RACCT TYPE STRING,
COST_ELEM TYPE STRING,
RBUKRS TYPE STRING,
RCNTR TYPE STRING,
PRCTR TYPE STRING,
RFAREA TYPE STRING,
RBUSA TYPE STRING,
KOKRS TYPE STRING,
SEGMENT TYPE STRING,
VNAME TYPE STRING,
EGRUP TYPE STRING,
RECID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_JVGLFLEXKEY_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_JVGLFLEXKEY_STR-RCLNT sy-vline 
WA_JVGLFLEXKEY_STR-RYEAR sy-vline 
WA_JVGLFLEXKEY_STR-ACTIV sy-vline 
WA_JVGLFLEXKEY_STR-RMVCT sy-vline 
WA_JVGLFLEXKEY_STR-RTCUR sy-vline 
WA_JVGLFLEXKEY_STR-RUNIT sy-vline 
WA_JVGLFLEXKEY_STR-AWTYP sy-vline 
WA_JVGLFLEXKEY_STR-RLDNR sy-vline 
WA_JVGLFLEXKEY_STR-RRCTY sy-vline 
WA_JVGLFLEXKEY_STR-RVERS sy-vline 
WA_JVGLFLEXKEY_STR-LOGSYS sy-vline 
WA_JVGLFLEXKEY_STR-RACCT sy-vline 
WA_JVGLFLEXKEY_STR-COST_ELEM sy-vline 
WA_JVGLFLEXKEY_STR-RBUKRS sy-vline 
WA_JVGLFLEXKEY_STR-RCNTR sy-vline 
WA_JVGLFLEXKEY_STR-PRCTR sy-vline 
WA_JVGLFLEXKEY_STR-RFAREA sy-vline 
WA_JVGLFLEXKEY_STR-RBUSA sy-vline 
WA_JVGLFLEXKEY_STR-KOKRS sy-vline 
WA_JVGLFLEXKEY_STR-SEGMENT sy-vline 
WA_JVGLFLEXKEY_STR-VNAME sy-vline 
WA_JVGLFLEXKEY_STR-EGRUP sy-vline 
WA_JVGLFLEXKEY_STR-RECID sy-vline      INTO ld_text SEPARATED BY SPACE.

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