ABAP Select data from SAP table GLE_MCA_STR_FREE_SEL_PARAMS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP GLE_MCA_STR_FREE_SEL_PARAMS 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_MCA_STR_FREE_SEL_PARAMS. 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_MCA_STR_FREE_SEL_PARAMS 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_MCA_STR_FREE_SEL_PARAMS TYPE STANDARD TABLE OF GLE_MCA_STR_FREE_SEL_PARAMS,
      WA_GLE_MCA_STR_FREE_SEL_PARAMS TYPE GLE_MCA_STR_FREE_SEL_PARAMS,
      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_MCA_STR_FREE_SEL_PARAMS> TYPE GLE_MCA_STR_FREE_SEL_PARAMS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GLE_MCA_STR_FREE_SEL_PARAMS
*  INTO TABLE @DATA(IT_GLE_MCA_STR_FREE_SEL_PARAMS2).
*--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_MCA_STR_FREE_SEL_PARAMS INDEX 1 INTO DATA(WA_GLE_MCA_STR_FREE_SEL_PARAMS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GLE_MCA_STR_FREE_SEL_PARAMS>-RCNTR = 1.
<GLE_MCA_STR_FREE_SEL_PARAMS>-PRCTR = 1.
<GLE_MCA_STR_FREE_SEL_PARAMS>-RFAREA = 1.
<GLE_MCA_STR_FREE_SEL_PARAMS>-RBUSA = 1.
<GLE_MCA_STR_FREE_SEL_PARAMS>-KOKRS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GLE_MCA_STR_FREE_SEL_PARAMS-SEGMENT, sy-vline,
  WA_GLE_MCA_STR_FREE_SEL_PARAMS-SCNTR, sy-vline,
  WA_GLE_MCA_STR_FREE_SEL_PARAMS-PPRCTR, sy-vline,
  WA_GLE_MCA_STR_FREE_SEL_PARAMS-SFAREA, sy-vline,
  WA_GLE_MCA_STR_FREE_SEL_PARAMS-SBUSA, sy-vline,
  WA_GLE_MCA_STR_FREE_SEL_PARAMS-RASSC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GLE_MCA_STR_FREE_SEL_PARAMS 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_MCA_STR_FREE_SEL_PARAMS 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_MCA_STR_FREE_SEL_PARAMS INTO WA_GLE_MCA_STR_FREE_SEL_PARAMS.


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

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

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

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

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

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

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

*Conversion exit PERI7, internal->external for field FISCYEARPER
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_GLE_MCA_STR_FREE_SEL_PARAMS-FISCYEARPER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLE_MCA_STR_FREE_SEL_PARAMS-FISCYEARPER.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GLE_MCA_STR_FREE_SEL_PARAMS-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLE_MCA_STR_FREE_SEL_PARAMS-BELNR.
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_MCA_STR_FREE_SEL_PARAMS_STR, 
RCNTR TYPE STRING,
PRCTR TYPE STRING,
RFAREA TYPE STRING,
RBUSA TYPE STRING,
KOKRS TYPE STRING,
SEGMENT TYPE STRING,
SCNTR TYPE STRING,
PPRCTR TYPE STRING,
SFAREA TYPE STRING,
SBUSA TYPE STRING,
RASSC TYPE STRING,
PSEGMENT TYPE STRING,
DRCRK TYPE STRING,
POPER TYPE STRING,
PERIV TYPE STRING,
FISCYEARPER TYPE STRING,
BUDAT TYPE STRING,
BLDAT TYPE STRING,
BLART TYPE STRING,
BUZEI TYPE STRING,
ZUONR TYPE STRING,
BSCHL TYPE STRING,
BSTAT TYPE STRING,
LINETYPE TYPE STRING,
KTOSL TYPE STRING,
SLALITTYPE TYPE STRING,
XSPLITMOD TYPE STRING,
USNAM TYPE STRING,
TIMESTAMP TYPE STRING,
EPRCTR TYPE STRING,
RHOART TYPE STRING,
GLACCOUNT_TYPE TYPE STRING,
KTOPL TYPE STRING,
LOKKT TYPE STRING,
KTOP2 TYPE STRING,
ACDOC_EEW_DUMMY TYPE STRING,
DUMMY_INCL_EEW_COBL TYPE STRING,
RMVCT TYPE STRING,
STGRD TYPE STRING,
BELNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GLE_MCA_STR_FREE_SEL_PARAMS_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_MCA_STR_FREE_SEL_PARAMS_STR-RCNTR sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-PRCTR sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-RFAREA sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-RBUSA sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-KOKRS sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-SEGMENT sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-SCNTR sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-PPRCTR sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-SFAREA sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-SBUSA sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-RASSC sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-PSEGMENT sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-DRCRK sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-POPER sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-PERIV sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-FISCYEARPER sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-BUDAT sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-BLDAT sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-BLART sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-BUZEI sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-ZUONR sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-BSCHL sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-BSTAT sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-LINETYPE sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-KTOSL sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-SLALITTYPE sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-XSPLITMOD sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-USNAM sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-TIMESTAMP sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-EPRCTR sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-RHOART sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-GLACCOUNT_TYPE sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-KTOPL sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-LOKKT sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-KTOP2 sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-ACDOC_EEW_DUMMY sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-DUMMY_INCL_EEW_COBL sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-RMVCT sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-STGRD sy-vline 
WA_GLE_MCA_STR_FREE_SEL_PARAMS_STR-BELNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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