ABAP Select data from SAP table GJV_OBJAPI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GJV_OBJAPI
*  INTO TABLE @DATA(IT_GJV_OBJAPI2).
*--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_GJV_OBJAPI INDEX 1 INTO DATA(WA_GJV_OBJAPI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GJV_OBJAPI>-BUKRS = 1.
<GJV_OBJAPI>-GSBER = 1.
<GJV_OBJAPI>-KOKRS = 1.
<GJV_OBJAPI>-PRCTR = 1.
<GJV_OBJAPI>-VNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GJV_OBJAPI-RECID, sy-vline,
  WA_GJV_OBJAPI-ETYPE, sy-vline,
  WA_GJV_OBJAPI-JV_JIBCL, sy-vline,
  WA_GJV_OBJAPI-JV_JIBSA, sy-vline,
  WA_GJV_OBJAPI-OTYPE, sy-vline,
  WA_GJV_OBJAPI-PKOKR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GJV_OBJAPI 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_GJV_OBJAPI 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_GJV_OBJAPI INTO WA_GJV_OBJAPI.


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

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

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

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

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

*Conversion exit ALPHA, internal->external for field KSTAR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GJV_OBJAPI-KSTAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GJV_OBJAPI-KSTAR.
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_GJV_OBJAPI_STR, 
BUKRS TYPE STRING,
GSBER TYPE STRING,
KOKRS TYPE STRING,
PRCTR TYPE STRING,
VNAME TYPE STRING,
RECID TYPE STRING,
ETYPE TYPE STRING,
JV_JIBCL TYPE STRING,
JV_JIBSA TYPE STRING,
OTYPE TYPE STRING,
PKOKR TYPE STRING,
PGSBR TYPE STRING,
PBUKR TYPE STRING,
VBUKR TYPE STRING,
VGSBR TYPE STRING,
VKOKR TYPE STRING,
KSTAR TYPE STRING,
OBJNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GJV_OBJAPI_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_GJV_OBJAPI_STR-BUKRS sy-vline 
WA_GJV_OBJAPI_STR-GSBER sy-vline 
WA_GJV_OBJAPI_STR-KOKRS sy-vline 
WA_GJV_OBJAPI_STR-PRCTR sy-vline 
WA_GJV_OBJAPI_STR-VNAME sy-vline 
WA_GJV_OBJAPI_STR-RECID sy-vline 
WA_GJV_OBJAPI_STR-ETYPE sy-vline 
WA_GJV_OBJAPI_STR-JV_JIBCL sy-vline 
WA_GJV_OBJAPI_STR-JV_JIBSA sy-vline 
WA_GJV_OBJAPI_STR-OTYPE sy-vline 
WA_GJV_OBJAPI_STR-PKOKR sy-vline 
WA_GJV_OBJAPI_STR-PGSBR sy-vline 
WA_GJV_OBJAPI_STR-PBUKR sy-vline 
WA_GJV_OBJAPI_STR-VBUKR sy-vline 
WA_GJV_OBJAPI_STR-VGSBR sy-vline 
WA_GJV_OBJAPI_STR-VKOKR sy-vline 
WA_GJV_OBJAPI_STR-KSTAR sy-vline 
WA_GJV_OBJAPI_STR-OBJNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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