ABAP Select data from SAP table MMQTNCOMP_D into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMQTNCOMP_D
*  INTO TABLE @DATA(IT_MMQTNCOMP_D2).
*--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_MMQTNCOMP_D INDEX 1 INTO DATA(WA_MMQTNCOMP_D2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMQTNCOMP_D>-MANDT = 1.
<MMQTNCOMP_D>-DRAFTUUID = 1.
<MMQTNCOMP_D>-PARENTDRAFTUUID = 1.
<MMQTNCOMP_D>-SUPPLIERQUOTATION = 1.
<MMQTNCOMP_D>-REQUESTFORQUOTATION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMQTNCOMP_D-SUPPLIER, sy-vline,
  WA_MMQTNCOMP_D-CREATIONDATE, sy-vline,
  WA_MMQTNCOMP_D-QUOTATIONSUBMISSIONDATE, sy-vline,
  WA_MMQTNCOMP_D-QTNLIFECYCLESTATUS, sy-vline,
  WA_MMQTNCOMP_D-DOCUMENTCURRENCY, sy-vline,
  WA_MMQTNCOMP_D-PURCHASINGORGANIZATION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMQTNCOMP_D 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_MMQTNCOMP_D 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_MMQTNCOMP_D INTO WA_MMQTNCOMP_D.


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

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

*Conversion exit ALPHA, internal->external for field SUPPLIER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMQTNCOMP_D-SUPPLIER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMQTNCOMP_D-SUPPLIER.
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_MMQTNCOMP_D_STR, 
MANDT TYPE STRING,
DRAFTUUID TYPE STRING,
PARENTDRAFTUUID TYPE STRING,
SUPPLIERQUOTATION TYPE STRING,
REQUESTFORQUOTATION TYPE STRING,
SUPPLIER TYPE STRING,
CREATIONDATE TYPE STRING,
QUOTATIONSUBMISSIONDATE TYPE STRING,
QTNLIFECYCLESTATUS TYPE STRING,
DOCUMENTCURRENCY TYPE STRING,
PURCHASINGORGANIZATION TYPE STRING,
PURCHASINGGROUP TYPE STRING,
PURCHASINGDOCUMENTTYPE TYPE STRING,
ISENDOFPURPOSEBLOCKED TYPE STRING,
HASACTIVEENTITY TYPE STRING,
DRAFTENTITYCREATIONDATETIME TYPE STRING,
DRAFTENTITYLASTCHANGEDATETIME TYPE STRING,
DRAFTADMINISTRATIVEDATAUUID TYPE STRING,
DRAFTENTITYCONSISTENCYSTATUS TYPE STRING,
DRAFTENTITYOPERATIONCODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMQTNCOMP_D_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_MMQTNCOMP_D_STR-MANDT sy-vline 
WA_MMQTNCOMP_D_STR-DRAFTUUID sy-vline 
WA_MMQTNCOMP_D_STR-PARENTDRAFTUUID sy-vline 
WA_MMQTNCOMP_D_STR-SUPPLIERQUOTATION sy-vline 
WA_MMQTNCOMP_D_STR-REQUESTFORQUOTATION sy-vline 
WA_MMQTNCOMP_D_STR-SUPPLIER sy-vline 
WA_MMQTNCOMP_D_STR-CREATIONDATE sy-vline 
WA_MMQTNCOMP_D_STR-QUOTATIONSUBMISSIONDATE sy-vline 
WA_MMQTNCOMP_D_STR-QTNLIFECYCLESTATUS sy-vline 
WA_MMQTNCOMP_D_STR-DOCUMENTCURRENCY sy-vline 
WA_MMQTNCOMP_D_STR-PURCHASINGORGANIZATION sy-vline 
WA_MMQTNCOMP_D_STR-PURCHASINGGROUP sy-vline 
WA_MMQTNCOMP_D_STR-PURCHASINGDOCUMENTTYPE sy-vline 
WA_MMQTNCOMP_D_STR-ISENDOFPURPOSEBLOCKED sy-vline 
WA_MMQTNCOMP_D_STR-HASACTIVEENTITY sy-vline 
WA_MMQTNCOMP_D_STR-DRAFTENTITYCREATIONDATETIME sy-vline 
WA_MMQTNCOMP_D_STR-DRAFTENTITYLASTCHANGEDATETIME sy-vline 
WA_MMQTNCOMP_D_STR-DRAFTADMINISTRATIVEDATAUUID sy-vline 
WA_MMQTNCOMP_D_STR-DRAFTENTITYCONSISTENCYSTATUS sy-vline 
WA_MMQTNCOMP_D_STR-DRAFTENTITYOPERATIONCODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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