ABAP Select data from SAP table GLPOS_C_GL_CT_SKA1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP GLPOS_C_GL_CT_SKA1 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 GLPOS_C_GL_CT_SKA1. 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 GLPOS_C_GL_CT_SKA1 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_GLPOS_C_GL_CT_SKA1 TYPE STANDARD TABLE OF GLPOS_C_GL_CT_SKA1,
      WA_GLPOS_C_GL_CT_SKA1 TYPE GLPOS_C_GL_CT_SKA1,
      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: <GLPOS_C_GL_CT_SKA1> TYPE GLPOS_C_GL_CT_SKA1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_GLPOS_C_GL_CT_SKA1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM GLPOS_C_GL_CT_SKA1
  INTO TABLE IT_GLPOS_C_GL_CT_SKA1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GLPOS_C_GL_CT_SKA1
*  INTO TABLE @DATA(IT_GLPOS_C_GL_CT_SKA12).
*--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_GLPOS_C_GL_CT_SKA1 INDEX 1 INTO DATA(WA_GLPOS_C_GL_CT_SKA12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_GLPOS_C_GL_CT_SKA1 ASSIGNING <GLPOS_C_GL_CT_SKA1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GLPOS_C_GL_CT_SKA1>-SKA1_XBILK = 1.
<GLPOS_C_GL_CT_SKA1>-SKA1_SAKAN = 1.
<GLPOS_C_GL_CT_SKA1>-SKA1_BILKT = 1.
<GLPOS_C_GL_CT_SKA1>-SKA1_ERDAT = 1.
<GLPOS_C_GL_CT_SKA1>-SKA1_ERNAM = 1.

ENDLOOP.

LOOP AT IT_GLPOS_C_GL_CT_SKA1 INTO WA_GLPOS_C_GL_CT_SKA1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GLPOS_C_GL_CT_SKA1-SKA1_GVTYP, sy-vline,
  WA_GLPOS_C_GL_CT_SKA1-SKA1_KTOKS, sy-vline,
  WA_GLPOS_C_GL_CT_SKA1-SKA1_MUSTR, sy-vline,
  WA_GLPOS_C_GL_CT_SKA1-SKA1_VBUND, sy-vline,
  WA_GLPOS_C_GL_CT_SKA1-SKA1_XLOEV, sy-vline,
  WA_GLPOS_C_GL_CT_SKA1-SKA1_XSPEA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GLPOS_C_GL_CT_SKA1 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_GLPOS_C_GL_CT_SKA1 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_GLPOS_C_GL_CT_SKA1 INTO WA_GLPOS_C_GL_CT_SKA1.


*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 SKA1_BILKT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GLPOS_C_GL_CT_SKA1-SKA1_BILKT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLPOS_C_GL_CT_SKA1-SKA1_BILKT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SKA1_MUSTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GLPOS_C_GL_CT_SKA1-SKA1_MUSTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLPOS_C_GL_CT_SKA1-SKA1_MUSTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SKA1_VBUND
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GLPOS_C_GL_CT_SKA1-SKA1_VBUND
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLPOS_C_GL_CT_SKA1-SKA1_VBUND.
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_GLPOS_C_GL_CT_SKA1_STR, 
SKA1_XBILK TYPE STRING,
SKA1_SAKAN TYPE STRING,
SKA1_BILKT TYPE STRING,
SKA1_ERDAT TYPE STRING,
SKA1_ERNAM TYPE STRING,
SKA1_GVTYP TYPE STRING,
SKA1_KTOKS TYPE STRING,
SKA1_MUSTR TYPE STRING,
SKA1_VBUND TYPE STRING,
SKA1_XLOEV TYPE STRING,
SKA1_XSPEA TYPE STRING,
SKA1_XSPEB TYPE STRING,
SKA1_XSPEP TYPE STRING,
SKA1_MCOD1 TYPE STRING,
SKA1_FUNC_AREA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GLPOS_C_GL_CT_SKA1_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_GLPOS_C_GL_CT_SKA1_STR-SKA1_XBILK sy-vline 
WA_GLPOS_C_GL_CT_SKA1_STR-SKA1_SAKAN sy-vline 
WA_GLPOS_C_GL_CT_SKA1_STR-SKA1_BILKT sy-vline 
WA_GLPOS_C_GL_CT_SKA1_STR-SKA1_ERDAT sy-vline 
WA_GLPOS_C_GL_CT_SKA1_STR-SKA1_ERNAM sy-vline 
WA_GLPOS_C_GL_CT_SKA1_STR-SKA1_GVTYP sy-vline 
WA_GLPOS_C_GL_CT_SKA1_STR-SKA1_KTOKS sy-vline 
WA_GLPOS_C_GL_CT_SKA1_STR-SKA1_MUSTR sy-vline 
WA_GLPOS_C_GL_CT_SKA1_STR-SKA1_VBUND sy-vline 
WA_GLPOS_C_GL_CT_SKA1_STR-SKA1_XLOEV sy-vline 
WA_GLPOS_C_GL_CT_SKA1_STR-SKA1_XSPEA sy-vline 
WA_GLPOS_C_GL_CT_SKA1_STR-SKA1_XSPEB sy-vline 
WA_GLPOS_C_GL_CT_SKA1_STR-SKA1_XSPEP sy-vline 
WA_GLPOS_C_GL_CT_SKA1_STR-SKA1_MCOD1 sy-vline 
WA_GLPOS_C_GL_CT_SKA1_STR-SKA1_FUNC_AREA sy-vline      INTO ld_text SEPARATED BY SPACE.

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