ABAP Select data from SAP table GMAVCA into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP GMAVCA 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 GMAVCA. 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 GMAVCA 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_GMAVCA TYPE STANDARD TABLE OF GMAVCA,
      WA_GMAVCA TYPE GMAVCA,
      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: <GMAVCA> TYPE GMAVCA.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GMAVCA
*  INTO TABLE @DATA(IT_GMAVCA2).
*--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_GMAVCA INDEX 1 INTO DATA(WA_GMAVCA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GMAVCA>-RCLNT = 1.
<GMAVCA>-GL_SIRID = 1.
<GMAVCA>-RLDNR = 1.
<GMAVCA>-RRCTY = 1.
<GMAVCA>-RVERS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GMAVCA-RYEAR, sy-vline,
  WA_GMAVCA-RTCUR, sy-vline,
  WA_GMAVCA-RUNIT, sy-vline,
  WA_GMAVCA-DRCRK, sy-vline,
  WA_GMAVCA-POPER, sy-vline,
  WA_GMAVCA-DOCCT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GMAVCA 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_GMAVCA 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_GMAVCA INTO WA_GMAVCA.


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

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

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

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

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

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

*Conversion exit GJAHR, internal->external for field CEFFYEAR_9
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_GMAVCA-CEFFYEAR_9
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GMAVCA-CEFFYEAR_9.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit GJAHR, internal->external for field GRANTEE_FY_9
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_GMAVCA-GRANTEE_FY_9
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GMAVCA-GRANTEE_FY_9.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit GJAHR, internal->external for field REFRYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_GMAVCA-REFRYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GMAVCA-REFRYEAR.
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_GMAVCA_STR, 
RCLNT TYPE STRING,
GL_SIRID TYPE STRING,
RLDNR TYPE STRING,
RRCTY TYPE STRING,
RVERS TYPE STRING,
RYEAR TYPE STRING,
RTCUR TYPE STRING,
RUNIT TYPE STRING,
DRCRK TYPE STRING,
POPER TYPE STRING,
DOCCT TYPE STRING,
DOCNR TYPE STRING,
DOCLN TYPE STRING,
RBUKRS TYPE STRING,
RGRANT_NBR TYPE STRING,
RFUND TYPE STRING,
RSPONSORED_PROG TYPE STRING,
RSPONSORED_CLASS TYPE STRING,
RBDGT_VLDTY_NBR TYPE STRING,
CEFFYEAR_9 TYPE STRING,
WFSTATE_9 TYPE STRING,
ALLOCTYPE_9 TYPE STRING,
LOGSYS TYPE STRING,
GRANTEE_FY_9 TYPE STRING,
SBUKRS TYPE STRING,
TSL TYPE STRING,
HSL TYPE STRING,
KSL TYPE STRING,
MSL TYPE STRING,
SGTXT TYPE STRING,
DOCTY TYPE STRING,
ACTIV TYPE STRING,
BUDAT TYPE STRING,
WSDAT TYPE STRING,
REFDOCNR TYPE STRING,
REFRYEAR TYPE STRING,
REFDOCLN TYPE STRING,
REFDOCCT TYPE STRING,
REFACTIV TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,
USNAM TYPE STRING,
AWTYP TYPE STRING,
AWORG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GMAVCA_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_GMAVCA_STR-RCLNT sy-vline 
WA_GMAVCA_STR-GL_SIRID sy-vline 
WA_GMAVCA_STR-RLDNR sy-vline 
WA_GMAVCA_STR-RRCTY sy-vline 
WA_GMAVCA_STR-RVERS sy-vline 
WA_GMAVCA_STR-RYEAR sy-vline 
WA_GMAVCA_STR-RTCUR sy-vline 
WA_GMAVCA_STR-RUNIT sy-vline 
WA_GMAVCA_STR-DRCRK sy-vline 
WA_GMAVCA_STR-POPER sy-vline 
WA_GMAVCA_STR-DOCCT sy-vline 
WA_GMAVCA_STR-DOCNR sy-vline 
WA_GMAVCA_STR-DOCLN sy-vline 
WA_GMAVCA_STR-RBUKRS sy-vline 
WA_GMAVCA_STR-RGRANT_NBR sy-vline 
WA_GMAVCA_STR-RFUND sy-vline 
WA_GMAVCA_STR-RSPONSORED_PROG sy-vline 
WA_GMAVCA_STR-RSPONSORED_CLASS sy-vline 
WA_GMAVCA_STR-RBDGT_VLDTY_NBR sy-vline 
WA_GMAVCA_STR-CEFFYEAR_9 sy-vline 
WA_GMAVCA_STR-WFSTATE_9 sy-vline 
WA_GMAVCA_STR-ALLOCTYPE_9 sy-vline 
WA_GMAVCA_STR-LOGSYS sy-vline 
WA_GMAVCA_STR-GRANTEE_FY_9 sy-vline 
WA_GMAVCA_STR-SBUKRS sy-vline 
WA_GMAVCA_STR-TSL sy-vline 
WA_GMAVCA_STR-HSL sy-vline 
WA_GMAVCA_STR-KSL sy-vline 
WA_GMAVCA_STR-MSL sy-vline 
WA_GMAVCA_STR-SGTXT sy-vline 
WA_GMAVCA_STR-DOCTY sy-vline 
WA_GMAVCA_STR-ACTIV sy-vline 
WA_GMAVCA_STR-BUDAT sy-vline 
WA_GMAVCA_STR-WSDAT sy-vline 
WA_GMAVCA_STR-REFDOCNR sy-vline 
WA_GMAVCA_STR-REFRYEAR sy-vline 
WA_GMAVCA_STR-REFDOCLN sy-vline 
WA_GMAVCA_STR-REFDOCCT sy-vline 
WA_GMAVCA_STR-REFACTIV sy-vline 
WA_GMAVCA_STR-CPUDT sy-vline 
WA_GMAVCA_STR-CPUTM sy-vline 
WA_GMAVCA_STR-USNAM sy-vline 
WA_GMAVCA_STR-AWTYP sy-vline 
WA_GMAVCA_STR-AWORG sy-vline      INTO ld_text SEPARATED BY SPACE.

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