ABAP Select data from SAP table GSBLCA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GSBLCA
*  INTO TABLE @DATA(IT_GSBLCA2).
*--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_GSBLCA INDEX 1 INTO DATA(WA_GSBLCA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GSBLCA>-MANDT = 1.
<GSBLCA>-BUKRS = 1.
<GSBLCA>-BELNR = 1.
<GSBLCA>-GJAHR = 1.
<GSBLCA>-BUZEI = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GSBLCA-MONAT, sy-vline,
  WA_GSBLCA-AUFNR, sy-vline,
  WA_GSBLCA-EBELN, sy-vline,
  WA_GSBLCA-HKONT, sy-vline,
  WA_GSBLCA-ALTKT, sy-vline,
  WA_GSBLCA-LIFNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GSBLCA 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_GSBLCA 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_GSBLCA INTO WA_GSBLCA.


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

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

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

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

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

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

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

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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_GSBLCA-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GSBLCA-MATNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_GSBLCA-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GSBLCA-MEINS.
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_GSBLCA_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
BUZEI TYPE STRING,
MONAT TYPE STRING,
AUFNR TYPE STRING,
EBELN TYPE STRING,
HKONT TYPE STRING,
ALTKT TYPE STRING,
LIFNR TYPE STRING,
KUNNR TYPE STRING,
MATNR TYPE STRING,
VBUND TYPE STRING,
GSBER TYPE STRING,
PARGB TYPE STRING,
GSBER_GP TYPE STRING,
GSBRK TYPE STRING,
GSBRK_GP TYPE STRING,
DMBTR TYPE STRING,
DMBE2 TYPE STRING,
HWAE2 TYPE STRING,
DMBE3 TYPE STRING,
HWAE3 TYPE STRING,
WRBTR TYPE STRING,
WAERS TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GSBLCA_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_GSBLCA_STR-MANDT sy-vline 
WA_GSBLCA_STR-BUKRS sy-vline 
WA_GSBLCA_STR-BELNR sy-vline 
WA_GSBLCA_STR-GJAHR sy-vline 
WA_GSBLCA_STR-BUZEI sy-vline 
WA_GSBLCA_STR-MONAT sy-vline 
WA_GSBLCA_STR-AUFNR sy-vline 
WA_GSBLCA_STR-EBELN sy-vline 
WA_GSBLCA_STR-HKONT sy-vline 
WA_GSBLCA_STR-ALTKT sy-vline 
WA_GSBLCA_STR-LIFNR sy-vline 
WA_GSBLCA_STR-KUNNR sy-vline 
WA_GSBLCA_STR-MATNR sy-vline 
WA_GSBLCA_STR-VBUND sy-vline 
WA_GSBLCA_STR-GSBER sy-vline 
WA_GSBLCA_STR-PARGB sy-vline 
WA_GSBLCA_STR-GSBER_GP sy-vline 
WA_GSBLCA_STR-GSBRK sy-vline 
WA_GSBLCA_STR-GSBRK_GP sy-vline 
WA_GSBLCA_STR-DMBTR sy-vline 
WA_GSBLCA_STR-DMBE2 sy-vline 
WA_GSBLCA_STR-HWAE2 sy-vline 
WA_GSBLCA_STR-DMBE3 sy-vline 
WA_GSBLCA_STR-HWAE3 sy-vline 
WA_GSBLCA_STR-WRBTR sy-vline 
WA_GSBLCA_STR-WAERS sy-vline 
WA_GSBLCA_STR-MENGE sy-vline 
WA_GSBLCA_STR-MEINS sy-vline      INTO ld_text SEPARATED BY SPACE.

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