ABAP Select data from SAP table WPQMAT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WPQMAT
*  INTO TABLE @DATA(IT_WPQMAT2).
*--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_WPQMAT INDEX 1 INTO DATA(WA_WPQMAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WPQMAT>-DATUM = 1.
<WPQMAT>-UTIME = 1.
<WPQMAT>-CHGFLAG = 1.
<WPQMAT>-MANDT = 1.
<WPQMAT>-ART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WPQMAT-MATNR, sy-vline,
  WA_WPQMAT-WERKS, sy-vline,
  WA_WPQMAT-PPL, sy-vline,
  WA_WPQMAT-SPEZUEBER, sy-vline,
  WA_WPQMAT-CONF, sy-vline,
  WA_WPQMAT-TLS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WPQMAT 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_WPQMAT 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_WPQMAT INTO WA_WPQMAT.


*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_WPQMAT-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WPQMAT-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR_CO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WPQMAT-AUFNR_CO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WPQMAT-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_WPQMAT_STR, 
DATUM TYPE STRING,
UTIME TYPE STRING,
CHGFLAG TYPE STRING,
MANDT TYPE STRING,
ART TYPE STRING,
MATNR 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,
CHG_ORIG_17 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WPQMAT_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_WPQMAT_STR-DATUM sy-vline 
WA_WPQMAT_STR-UTIME sy-vline 
WA_WPQMAT_STR-CHGFLAG sy-vline 
WA_WPQMAT_STR-MANDT sy-vline 
WA_WPQMAT_STR-ART sy-vline 
WA_WPQMAT_STR-MATNR sy-vline 
WA_WPQMAT_STR-WERKS sy-vline 
WA_WPQMAT_STR-PPL sy-vline 
WA_WPQMAT_STR-SPEZUEBER sy-vline 
WA_WPQMAT_STR-CONF sy-vline 
WA_WPQMAT_STR-TLS sy-vline 
WA_WPQMAT_STR-APP sy-vline 
WA_WPQMAT_STR-MER sy-vline 
WA_WPQMAT_STR-INSMK sy-vline 
WA_WPQMAT_STR-AVE sy-vline 
WA_WPQMAT_STR-STICHPRVER sy-vline 
WA_WPQMAT_STR-DYNREGEL sy-vline 
WA_WPQMAT_STR-SPROZ sy-vline 
WA_WPQMAT_STR-HPZ sy-vline 
WA_WPQMAT_STR-DYN sy-vline 
WA_WPQMAT_STR-MPB sy-vline 
WA_WPQMAT_STR-MST sy-vline 
WA_WPQMAT_STR-EIN sy-vline 
WA_WPQMAT_STR-MPDAU sy-vline 
WA_WPQMAT_STR-CHG sy-vline 
WA_WPQMAT_STR-QKZVERF sy-vline 
WA_WPQMAT_STR-QPMAT sy-vline 
WA_WPQMAT_STR-KZPRFKOST sy-vline 
WA_WPQMAT_STR-AUFNR_CO sy-vline 
WA_WPQMAT_STR-AKTIV sy-vline 
WA_WPQMAT_STR-APA sy-vline 
WA_WPQMAT_STR-AFR sy-vline 
WA_WPQMAT_STR-MMA sy-vline 
WA_WPQMAT_STR-FEH sy-vline 
WA_WPQMAT_STR-PRFRQ sy-vline 
WA_WPQMAT_STR-NKMPR sy-vline 
WA_WPQMAT_STR-MS_FLAG sy-vline 
WA_WPQMAT_STR-CHG_ORIG_17 sy-vline      INTO ld_text SEPARATED BY SPACE.

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