ABAP Select data from SAP table GLE_MCA_STR_BSEG_ALV 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_BSEG_ALV 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_BSEG_ALV. 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_BSEG_ALV 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_BSEG_ALV TYPE STANDARD TABLE OF GLE_MCA_STR_BSEG_ALV,
      WA_GLE_MCA_STR_BSEG_ALV TYPE GLE_MCA_STR_BSEG_ALV,
      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_BSEG_ALV> TYPE GLE_MCA_STR_BSEG_ALV.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GLE_MCA_STR_BSEG_ALV
*  INTO TABLE @DATA(IT_GLE_MCA_STR_BSEG_ALV2).
*--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_BSEG_ALV INDEX 1 INTO DATA(WA_GLE_MCA_STR_BSEG_ALV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GLE_MCA_STR_BSEG_ALV>-DOC_NO = 1.
<GLE_MCA_STR_BSEG_ALV>-BELNR = 1.
<GLE_MCA_STR_BSEG_ALV>-STYPE = 1.
<GLE_MCA_STR_BSEG_ALV>-TBNAM = 1.
<GLE_MCA_STR_BSEG_ALV>-NEWBS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GLE_MCA_STR_BSEG_ALV-NEWUM, sy-vline,
  WA_GLE_MCA_STR_BSEG_ALV-NEWBK, sy-vline,
  WA_GLE_MCA_STR_BSEG_ALV-WRBTR, sy-vline,
  WA_GLE_MCA_STR_BSEG_ALV-DMBTR, sy-vline,
  WA_GLE_MCA_STR_BSEG_ALV-HWAER, sy-vline,
  WA_GLE_MCA_STR_BSEG_ALV-DMBE2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GLE_MCA_STR_BSEG_ALV 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_BSEG_ALV 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_BSEG_ALV INTO WA_GLE_MCA_STR_BSEG_ALV.


*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_GLE_MCA_STR_BSEG_ALV-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLE_MCA_STR_BSEG_ALV-BELNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field ANLN1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GLE_MCA_STR_BSEG_ALV-ANLN1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLE_MCA_STR_BSEG_ALV-ANLN1.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ABPSP, internal->external for field PS_PSP_PNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_GLE_MCA_STR_BSEG_ALV-PS_PSP_PNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLE_MCA_STR_BSEG_ALV-PS_PSP_PNR.
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_BSEG_ALV_STR, 
DOC_NO TYPE STRING,
BELNR TYPE STRING,
STYPE TYPE STRING,
TBNAM TYPE STRING,
NEWBS TYPE STRING,
NEWUM TYPE STRING,
NEWBK TYPE STRING,
WRBTR TYPE STRING,
DMBTR TYPE STRING,
HWAER TYPE STRING,
DMBE2 TYPE STRING,
HWAE2 TYPE STRING,
DMBE3 TYPE STRING,
HWAE3 TYPE STRING,
NEWKO TYPE STRING,
NEWBW TYPE STRING,
HKONT TYPE STRING,
MWSKZ TYPE STRING,
XSKRL TYPE STRING,
GSBER TYPE STRING,
KOSTL TYPE STRING,
AUFNR TYPE STRING,
BEWAR TYPE STRING,
PRCTR TYPE STRING,
SGTXT TYPE STRING,
PARGB TYPE STRING,
VALUT TYPE STRING,
ZUONR TYPE STRING,
KUNNR TYPE STRING,
LIFNR TYPE STRING,
ANLN1 TYPE STRING,
VBUND TYPE STRING,
INT_DOC_REF_ID TYPE STRING,
INT_DOC_YEAR TYPE STRING,
DUMMY_INCL_EEW_COBL TYPE STRING,
PS_PSP_PNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GLE_MCA_STR_BSEG_ALV_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_BSEG_ALV_STR-DOC_NO sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-BELNR sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-STYPE sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-TBNAM sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-NEWBS sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-NEWUM sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-NEWBK sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-WRBTR sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-DMBTR sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-HWAER sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-DMBE2 sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-HWAE2 sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-DMBE3 sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-HWAE3 sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-NEWKO sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-NEWBW sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-HKONT sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-MWSKZ sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-XSKRL sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-GSBER sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-KOSTL sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-AUFNR sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-BEWAR sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-PRCTR sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-SGTXT sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-PARGB sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-VALUT sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-ZUONR sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-KUNNR sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-LIFNR sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-ANLN1 sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-VBUND sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-INT_DOC_REF_ID sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-INT_DOC_YEAR sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-DUMMY_INCL_EEW_COBL sy-vline 
WA_GLE_MCA_STR_BSEG_ALV_STR-PS_PSP_PNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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