ABAP Select data from SAP table QMAT_DQ_STR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM QMAT_DQ_STR
*  INTO TABLE @DATA(IT_QMAT_DQ_STR2).
*--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_QMAT_DQ_STR INDEX 1 INTO DATA(WA_QMAT_DQ_STR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<QMAT_DQ_STR>-SOURCE_SYSTEM = 1.
<QMAT_DQ_STR>-SOURCE_ID = 1.
<QMAT_DQ_STR>-ART = 1.
<QMAT_DQ_STR>-WERKS = 1.
<QMAT_DQ_STR>-PPL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_QMAT_DQ_STR-SPEZUEBER, sy-vline,
  WA_QMAT_DQ_STR-CONF, sy-vline,
  WA_QMAT_DQ_STR-TLS, sy-vline,
  WA_QMAT_DQ_STR-APP, sy-vline,
  WA_QMAT_DQ_STR-MER, sy-vline,
  WA_QMAT_DQ_STR-INSMK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_QMAT_DQ_STR 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_QMAT_DQ_STR 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_QMAT_DQ_STR INTO WA_QMAT_DQ_STR.


*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 AUFNR_CO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_QMAT_DQ_STR-AUFNR_CO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QMAT_DQ_STR-AUFNR_CO.
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_QMAT_DQ_STR_STR, 
SOURCE_SYSTEM TYPE STRING,
SOURCE_ID TYPE STRING,
ART TYPE STRING,
WERKS TYPE STRING,
PPL TYPE STRING,
SPEZUEBER TYPE STRING,
CONF TYPE STRING,
TLS TYPE STRING,
APP TYPE STRING,
MER TYPE STRING,
INSMK TYPE STRING,
AVE TYPE STRING,
STICHPRVER TYPE STRING,
DYNREGEL TYPE STRING,
SPROZ TYPE STRING,
HPZ TYPE STRING,
DYN TYPE STRING,
MPB TYPE STRING,
MST TYPE STRING,
EIN TYPE STRING,
MPDAU TYPE STRING,
CHG TYPE STRING,
QKZVERF TYPE STRING,
QPMAT TYPE STRING,
KZPRFKOST TYPE STRING,
AUFNR_CO TYPE STRING,
AKTIV TYPE STRING,
APA TYPE STRING,
AFR TYPE STRING,
MMA TYPE STRING,
FEH TYPE STRING,
PRFRQ TYPE STRING,
NKMPR TYPE STRING,
MS_FLAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_QMAT_DQ_STR_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_QMAT_DQ_STR_STR-SOURCE_SYSTEM sy-vline 
WA_QMAT_DQ_STR_STR-SOURCE_ID sy-vline 
WA_QMAT_DQ_STR_STR-ART sy-vline 
WA_QMAT_DQ_STR_STR-WERKS sy-vline 
WA_QMAT_DQ_STR_STR-PPL sy-vline 
WA_QMAT_DQ_STR_STR-SPEZUEBER sy-vline 
WA_QMAT_DQ_STR_STR-CONF sy-vline 
WA_QMAT_DQ_STR_STR-TLS sy-vline 
WA_QMAT_DQ_STR_STR-APP sy-vline 
WA_QMAT_DQ_STR_STR-MER sy-vline 
WA_QMAT_DQ_STR_STR-INSMK sy-vline 
WA_QMAT_DQ_STR_STR-AVE sy-vline 
WA_QMAT_DQ_STR_STR-STICHPRVER sy-vline 
WA_QMAT_DQ_STR_STR-DYNREGEL sy-vline 
WA_QMAT_DQ_STR_STR-SPROZ sy-vline 
WA_QMAT_DQ_STR_STR-HPZ sy-vline 
WA_QMAT_DQ_STR_STR-DYN sy-vline 
WA_QMAT_DQ_STR_STR-MPB sy-vline 
WA_QMAT_DQ_STR_STR-MST sy-vline 
WA_QMAT_DQ_STR_STR-EIN sy-vline 
WA_QMAT_DQ_STR_STR-MPDAU sy-vline 
WA_QMAT_DQ_STR_STR-CHG sy-vline 
WA_QMAT_DQ_STR_STR-QKZVERF sy-vline 
WA_QMAT_DQ_STR_STR-QPMAT sy-vline 
WA_QMAT_DQ_STR_STR-KZPRFKOST sy-vline 
WA_QMAT_DQ_STR_STR-AUFNR_CO sy-vline 
WA_QMAT_DQ_STR_STR-AKTIV sy-vline 
WA_QMAT_DQ_STR_STR-APA sy-vline 
WA_QMAT_DQ_STR_STR-AFR sy-vline 
WA_QMAT_DQ_STR_STR-MMA sy-vline 
WA_QMAT_DQ_STR_STR-FEH sy-vline 
WA_QMAT_DQ_STR_STR-PRFRQ sy-vline 
WA_QMAT_DQ_STR_STR-NKMPR sy-vline 
WA_QMAT_DQ_STR_STR-MS_FLAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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