ABAP Select data from SAP table GLE_STR_MCA_FREE_SELECTION into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GLE_STR_MCA_FREE_SELECTION
*  INTO TABLE @DATA(IT_GLE_STR_MCA_FREE_SELECTION2).
*--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_GLE_STR_MCA_FREE_SELECTION INDEX 1 INTO DATA(WA_GLE_STR_MCA_FREE_SELECTION2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GLE_STR_MCA_FREE_SELECTION>-MANDT = 1.
<GLE_STR_MCA_FREE_SELECTION>-RUNID = 1.
<GLE_STR_MCA_FREE_SELECTION>-MCA_DOCNO = 1.
<GLE_STR_MCA_FREE_SELECTION>-RLDNR = 1.
<GLE_STR_MCA_FREE_SELECTION>-BUKRS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GLE_STR_MCA_FREE_SELECTION-BELNR, sy-vline,
  WA_GLE_STR_MCA_FREE_SELECTION-GJAHR, sy-vline,
  WA_GLE_STR_MCA_FREE_SELECTION-BLART, sy-vline,
  WA_GLE_STR_MCA_FREE_SELECTION-BLDAT, sy-vline,
  WA_GLE_STR_MCA_FREE_SELECTION-BUDAT, sy-vline,
  WA_GLE_STR_MCA_FREE_SELECTION-MONAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GLE_STR_MCA_FREE_SELECTION 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_GLE_STR_MCA_FREE_SELECTION 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_GLE_STR_MCA_FREE_SELECTION INTO WA_GLE_STR_MCA_FREE_SELECTION.


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

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

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

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_GLE_STR_MCA_FREE_SELECTION-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLE_STR_MCA_FREE_SELECTION-GJAHR.
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_GLE_STR_MCA_FREE_SELECTION_STR, 
MANDT TYPE STRING,
RUNID TYPE STRING,
MCA_DOCNO TYPE STRING,
RLDNR TYPE STRING,
BUKRS TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
BLART TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
MONAT TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,
AEDAT TYPE STRING,
UPDDT TYPE STRING,
USNAM TYPE STRING,
WAERS TYPE STRING,
HWAER TYPE STRING,
USCMP TYPE STRING,
USUPD TYPE STRING,
ALL_PARKED_DOC TYPE STRING,
STODT TYPE STRING,
STGRD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GLE_STR_MCA_FREE_SELECTION_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_GLE_STR_MCA_FREE_SELECTION_STR-MANDT sy-vline 
WA_GLE_STR_MCA_FREE_SELECTION_STR-RUNID sy-vline 
WA_GLE_STR_MCA_FREE_SELECTION_STR-MCA_DOCNO sy-vline 
WA_GLE_STR_MCA_FREE_SELECTION_STR-RLDNR sy-vline 
WA_GLE_STR_MCA_FREE_SELECTION_STR-BUKRS sy-vline 
WA_GLE_STR_MCA_FREE_SELECTION_STR-BELNR sy-vline 
WA_GLE_STR_MCA_FREE_SELECTION_STR-GJAHR sy-vline 
WA_GLE_STR_MCA_FREE_SELECTION_STR-BLART sy-vline 
WA_GLE_STR_MCA_FREE_SELECTION_STR-BLDAT sy-vline 
WA_GLE_STR_MCA_FREE_SELECTION_STR-BUDAT sy-vline 
WA_GLE_STR_MCA_FREE_SELECTION_STR-MONAT sy-vline 
WA_GLE_STR_MCA_FREE_SELECTION_STR-CPUDT sy-vline 
WA_GLE_STR_MCA_FREE_SELECTION_STR-CPUTM sy-vline 
WA_GLE_STR_MCA_FREE_SELECTION_STR-AEDAT sy-vline 
WA_GLE_STR_MCA_FREE_SELECTION_STR-UPDDT sy-vline 
WA_GLE_STR_MCA_FREE_SELECTION_STR-USNAM sy-vline 
WA_GLE_STR_MCA_FREE_SELECTION_STR-WAERS sy-vline 
WA_GLE_STR_MCA_FREE_SELECTION_STR-HWAER sy-vline 
WA_GLE_STR_MCA_FREE_SELECTION_STR-USCMP sy-vline 
WA_GLE_STR_MCA_FREE_SELECTION_STR-USUPD sy-vline 
WA_GLE_STR_MCA_FREE_SELECTION_STR-ALL_PARKED_DOC sy-vline 
WA_GLE_STR_MCA_FREE_SELECTION_STR-STODT sy-vline 
WA_GLE_STR_MCA_FREE_SELECTION_STR-STGRD sy-vline      INTO ld_text SEPARATED BY SPACE.

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