ABAP Select data from SAP table MCQAPO into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MCQAPO 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 MCQAPO. 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 MCQAPO 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_MCQAPO TYPE STANDARD TABLE OF MCQAPO,
      WA_MCQAPO TYPE MCQAPO,
      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: <MCQAPO> TYPE MCQAPO.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCQAPO
*  INTO TABLE @DATA(IT_MCQAPO2).
*--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_MCQAPO INDEX 1 INTO DATA(WA_MCQAPO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCQAPO>-AUFPL = 1.
<MCQAPO>-VORGLFNR = 1.
<MCQAPO>-PPLNKN = 1.
<MCQAPO>-PRUEFLOS = 1.
<MCQAPO>-VORNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCQAPO-PRPLATZ, sy-vline,
  WA_MCQAPO-PRPLATZWRK, sy-vline,
  WA_MCQAPO-ARBID, sy-vline,
  WA_MCQAPO-OBJTY, sy-vline,
  WA_MCQAPO-PLGRPLTYP, sy-vline,
  WA_MCQAPO-PLNAL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCQAPO 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_MCQAPO 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_MCQAPO INTO WA_MCQAPO.


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

*Conversion exit NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_MCQAPO-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCQAPO-VORNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field VPLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MCQAPO-VPLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCQAPO-VPLNR.
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_MCQAPO_STR, 
AUFPL TYPE STRING,
VORGLFNR TYPE STRING,
PPLNKN TYPE STRING,
PRUEFLOS TYPE STRING,
VORNR TYPE STRING,
PRPLATZ TYPE STRING,
PRPLATZWRK TYPE STRING,
ARBID TYPE STRING,
OBJTY TYPE STRING,
PLGRPLTYP TYPE STRING,
PLNAL TYPE STRING,
PLNTY TYPE STRING,
PLNNR TYPE STRING,
VPLTY TYPE STRING,
VPLNR TYPE STRING,
VPLNKN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCQAPO_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_MCQAPO_STR-AUFPL sy-vline 
WA_MCQAPO_STR-VORGLFNR sy-vline 
WA_MCQAPO_STR-PPLNKN sy-vline 
WA_MCQAPO_STR-PRUEFLOS sy-vline 
WA_MCQAPO_STR-VORNR sy-vline 
WA_MCQAPO_STR-PRPLATZ sy-vline 
WA_MCQAPO_STR-PRPLATZWRK sy-vline 
WA_MCQAPO_STR-ARBID sy-vline 
WA_MCQAPO_STR-OBJTY sy-vline 
WA_MCQAPO_STR-PLGRPLTYP sy-vline 
WA_MCQAPO_STR-PLNAL sy-vline 
WA_MCQAPO_STR-PLNTY sy-vline 
WA_MCQAPO_STR-PLNNR sy-vline 
WA_MCQAPO_STR-VPLTY sy-vline 
WA_MCQAPO_STR-VPLNR sy-vline 
WA_MCQAPO_STR-VPLNKN sy-vline      INTO ld_text SEPARATED BY SPACE.

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