ABAP Select data from SAP table MGV_QINF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MGV_QINF
*  INTO TABLE @DATA(IT_MGV_QINF2).
*--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_MGV_QINF INDEX 1 INTO DATA(WA_MGV_QINF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MGV_QINF>-MANDT = 1.
<MGV_QINF>-MATNR = 1.
<MGV_QINF>-ZAEHL = 1.
<MGV_QINF>-ERSTELLER = 1.
<MGV_QINF>-ERSTELLDAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MGV_QINF-AENDERER, sy-vline,
  WA_MGV_QINF-AENDERDAT, sy-vline,
  WA_MGV_QINF-LIEFERANT, sy-vline,
  WA_MGV_QINF-WERK, sy-vline,
  WA_MGV_QINF-FREI_DAT, sy-vline,
  WA_MGV_QINF-FREI_MGKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MGV_QINF 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_MGV_QINF 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_MGV_QINF INTO WA_MGV_QINF.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MGV_QINF-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MGV_QINF-MATNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field ME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MGV_QINF-ME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MGV_QINF-ME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRACHE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_MGV_QINF-SPRACHE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MGV_QINF-SPRACHE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_MGV_QINF-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MGV_QINF-SPRAS.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field PLOS2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MGV_QINF-PLOS2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MGV_QINF-PLOS2.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit MATNL, internal->external for field MATNR_EXT
CALL FUNCTION 'CONVERSION_EXIT_MATNL_OUTPUT'
  EXPORTING
    input =                      WA_MGV_QINF-MATNR_EXT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MGV_QINF-MATNR_EXT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATNW, internal->external for field MATNR_VERS
CALL FUNCTION 'CONVERSION_EXIT_MATNW_OUTPUT'
  EXPORTING
    input =                      WA_MGV_QINF-MATNR_VERS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MGV_QINF-MATNR_VERS.
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_MGV_QINF_STR, 
MANDT TYPE STRING,
MATNR TYPE STRING,
ZAEHL TYPE STRING,
ERSTELLER TYPE STRING,
ERSTELLDAT TYPE STRING,
AENDERER TYPE STRING,
AENDERDAT TYPE STRING,
LIEFERANT TYPE STRING,
WERK TYPE STRING,
FREI_DAT TYPE STRING,
FREI_MGKZ TYPE STRING,
ME TYPE STRING,
FREI_MNG TYPE STRING,
BEST_MG TYPE STRING,
DAT_RUECK TYPE STRING,
SPERRGRUND TYPE STRING,
SPRACHE TYPE STRING,
SPERRFKT TYPE STRING,
QVVORH TYPE STRING,
NOINSP TYPE STRING,
QSSYSFAM TYPE STRING,
QSSYSDAT TYPE STRING,
VARIABNAHM TYPE STRING,
LTEXTKZ TYPE STRING,
SPRAS TYPE STRING,
PLOS TYPE STRING,
PLOS2 TYPE STRING,
STSMA TYPE STRING,
OBJNR TYPE STRING,
NOINSPABN TYPE STRING,
VORLABN TYPE STRING,
REVLV TYPE STRING,
LOEKZ TYPE STRING,
CERTCONTROL TYPE STRING,
MATNR_EXT TYPE STRING,
MATNR_VERS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MGV_QINF_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_MGV_QINF_STR-MANDT sy-vline 
WA_MGV_QINF_STR-MATNR sy-vline 
WA_MGV_QINF_STR-ZAEHL sy-vline 
WA_MGV_QINF_STR-ERSTELLER sy-vline 
WA_MGV_QINF_STR-ERSTELLDAT sy-vline 
WA_MGV_QINF_STR-AENDERER sy-vline 
WA_MGV_QINF_STR-AENDERDAT sy-vline 
WA_MGV_QINF_STR-LIEFERANT sy-vline 
WA_MGV_QINF_STR-WERK sy-vline 
WA_MGV_QINF_STR-FREI_DAT sy-vline 
WA_MGV_QINF_STR-FREI_MGKZ sy-vline 
WA_MGV_QINF_STR-ME sy-vline 
WA_MGV_QINF_STR-FREI_MNG sy-vline 
WA_MGV_QINF_STR-BEST_MG sy-vline 
WA_MGV_QINF_STR-DAT_RUECK sy-vline 
WA_MGV_QINF_STR-SPERRGRUND sy-vline 
WA_MGV_QINF_STR-SPRACHE sy-vline 
WA_MGV_QINF_STR-SPERRFKT sy-vline 
WA_MGV_QINF_STR-QVVORH sy-vline 
WA_MGV_QINF_STR-NOINSP sy-vline 
WA_MGV_QINF_STR-QSSYSFAM sy-vline 
WA_MGV_QINF_STR-QSSYSDAT sy-vline 
WA_MGV_QINF_STR-VARIABNAHM sy-vline 
WA_MGV_QINF_STR-LTEXTKZ sy-vline 
WA_MGV_QINF_STR-SPRAS sy-vline 
WA_MGV_QINF_STR-PLOS sy-vline 
WA_MGV_QINF_STR-PLOS2 sy-vline 
WA_MGV_QINF_STR-STSMA sy-vline 
WA_MGV_QINF_STR-OBJNR sy-vline 
WA_MGV_QINF_STR-NOINSPABN sy-vline 
WA_MGV_QINF_STR-VORLABN sy-vline 
WA_MGV_QINF_STR-REVLV sy-vline 
WA_MGV_QINF_STR-LOEKZ sy-vline 
WA_MGV_QINF_STR-CERTCONTROL sy-vline 
WA_MGV_QINF_STR-MATNR_EXT sy-vline 
WA_MGV_QINF_STR-MATNR_VERS sy-vline      INTO ld_text SEPARATED BY SPACE.

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