ABAP Select data from SAP table CONVAL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CONVAL
*  INTO TABLE @DATA(IT_CONVAL2).
*--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_CONVAL INDEX 1 INTO DATA(WA_CONVAL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CONVAL>-FONDS = 1.
<CONVAL>-FICTR = 1.
<CONVAL>-FIPEX = 1.
<CONVAL>-MEASURE = 1.
<CONVAL>-GRANT_NBR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CONVAL-GJAHR, sy-vline,
  WA_CONVAL-GNJHR, sy-vline,
  WA_CONVAL-PERIO, sy-vline,
  WA_CONVAL-WRTTP, sy-vline,
  WA_CONVAL-WTEXT, sy-vline,
  WA_CONVAL-BTART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CONVAL 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_CONVAL 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_CONVAL INTO WA_CONVAL.


*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 FMCIL, internal->external for field FIPEX
CALL FUNCTION 'CONVERSION_EXIT_FMCIL_OUTPUT'
  EXPORTING
    input =                      WA_CONVAL-FIPEX
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CONVAL-FIPEX.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit ALPHA, internal->external for field RVERS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CONVAL-RVERS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CONVAL-RVERS.
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_CONVAL_STR, 
FONDS TYPE STRING,
FICTR TYPE STRING,
FIPEX TYPE STRING,
MEASURE TYPE STRING,
GRANT_NBR TYPE STRING,
GJAHR TYPE STRING,
GNJHR TYPE STRING,
PERIO TYPE STRING,
WRTTP TYPE STRING,
WTEXT TYPE STRING,
BTART TYPE STRING,
BTEXT TYPE STRING,
BUKRS TYPE STRING,
HKONT TYPE STRING,
STATS TYPE STRING,
STATT TYPE STRING,
VRGNG TYPE STRING,
VTEXT TYPE STRING,
RRCTY TYPE STRING,
RVERS TYPE STRING,
CFLEV TYPE STRING,
CF_FLAG TYPE STRING,
DISTKEY TYPE STRING,
USERDIM TYPE STRING,
FAREA TYPE STRING,
FTEXT TYPE STRING,
BUSA TYPE STRING,
FWAER TYPE STRING,
FKBTRP TYPE STRING,
FKBTRC TYPE STRING,
FKBTRW TYPE STRING,
TWAER TYPE STRING,
TRBTRP TYPE STRING,
TRBTRC TYPE STRING,
TRBTRW TYPE STRING,
BUDGET_PD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CONVAL_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_CONVAL_STR-FONDS sy-vline 
WA_CONVAL_STR-FICTR sy-vline 
WA_CONVAL_STR-FIPEX sy-vline 
WA_CONVAL_STR-MEASURE sy-vline 
WA_CONVAL_STR-GRANT_NBR sy-vline 
WA_CONVAL_STR-GJAHR sy-vline 
WA_CONVAL_STR-GNJHR sy-vline 
WA_CONVAL_STR-PERIO sy-vline 
WA_CONVAL_STR-WRTTP sy-vline 
WA_CONVAL_STR-WTEXT sy-vline 
WA_CONVAL_STR-BTART sy-vline 
WA_CONVAL_STR-BTEXT sy-vline 
WA_CONVAL_STR-BUKRS sy-vline 
WA_CONVAL_STR-HKONT sy-vline 
WA_CONVAL_STR-STATS sy-vline 
WA_CONVAL_STR-STATT sy-vline 
WA_CONVAL_STR-VRGNG sy-vline 
WA_CONVAL_STR-VTEXT sy-vline 
WA_CONVAL_STR-RRCTY sy-vline 
WA_CONVAL_STR-RVERS sy-vline 
WA_CONVAL_STR-CFLEV sy-vline 
WA_CONVAL_STR-CF_FLAG sy-vline 
WA_CONVAL_STR-DISTKEY sy-vline 
WA_CONVAL_STR-USERDIM sy-vline 
WA_CONVAL_STR-FAREA sy-vline 
WA_CONVAL_STR-FTEXT sy-vline 
WA_CONVAL_STR-BUSA sy-vline 
WA_CONVAL_STR-FWAER sy-vline 
WA_CONVAL_STR-FKBTRP sy-vline 
WA_CONVAL_STR-FKBTRC sy-vline 
WA_CONVAL_STR-FKBTRW sy-vline 
WA_CONVAL_STR-TWAER sy-vline 
WA_CONVAL_STR-TRBTRP sy-vline 
WA_CONVAL_STR-TRBTRC sy-vline 
WA_CONVAL_STR-TRBTRW sy-vline 
WA_CONVAL_STR-BUDGET_PD sy-vline      INTO ld_text SEPARATED BY SPACE.

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