ABAP Select data from SAP table WPMKAL 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 WPMKAL 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 WPMKAL. 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 WPMKAL 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_WPMKAL TYPE STANDARD TABLE OF WPMKAL,
      WA_WPMKAL TYPE WPMKAL,
      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: <WPMKAL> TYPE WPMKAL.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WPMKAL
*  INTO TABLE @DATA(IT_WPMKAL2).
*--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_WPMKAL INDEX 1 INTO DATA(WA_WPMKAL2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WPMKAL-MATNR, sy-vline,
  WA_WPMKAL-WERKS, sy-vline,
  WA_WPMKAL-VERID, sy-vline,
  WA_WPMKAL-BDATU, sy-vline,
  WA_WPMKAL-ADATU, sy-vline,
  WA_WPMKAL-STLAL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WPMKAL 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_WPMKAL 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_WPMKAL INTO WA_WPMKAL.


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

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

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

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

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

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field EXE_ALNAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WPMKAL-EXE_ALNAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WPMKAL-EXE_ALNAL.
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_WPMKAL_STR, 
DATUM TYPE STRING,
UTIME TYPE STRING,
AENNR TYPE STRING,
CHGFLAG TYPE STRING,
MANDT TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
VERID TYPE STRING,
BDATU TYPE STRING,
ADATU TYPE STRING,
STLAL TYPE STRING,
STLAN TYPE STRING,
PLNTY TYPE STRING,
PLNNR TYPE STRING,
ALNAL TYPE STRING,
BESKZ TYPE STRING,
SOBSL TYPE STRING,
LOSGR TYPE STRING,
MDV01 TYPE STRING,
MDV02 TYPE STRING,
TEXT1 TYPE STRING,
EWAHR TYPE STRING,
VERTO TYPE STRING,
SERKZ TYPE STRING,
BSTMI TYPE STRING,
BSTMA TYPE STRING,
RGEKZ TYPE STRING,
ALORT TYPE STRING,
PLTYG TYPE STRING,
PLNNG TYPE STRING,
ALNAG TYPE STRING,
PLTYM TYPE STRING,
PLNNM TYPE STRING,
ALNAM TYPE STRING,
CSPLT TYPE STRING,
MATKO TYPE STRING,
ELPRO TYPE STRING,
PRVBE TYPE STRING,
PRFG_F TYPE STRING,
PRDAT TYPE STRING,
MKSP TYPE STRING,
PRFG_R TYPE STRING,
PRFG_G TYPE STRING,
PRFG_S TYPE STRING,
UCMAT TYPE STRING,
VERSIND TYPE STRING,
DIFFPLANEXEMSTR TYPE STRING,
EWM_LGNUM TYPE STRING,
EWM_LGPLA TYPE STRING,
EXE_STLAL TYPE STRING,
EXE_STLAN TYPE STRING,
EXE_PLNTY TYPE STRING,
EXE_PLNNR TYPE STRING,
EXE_ALNAL TYPE STRING,
PPEGUID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WPMKAL_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_WPMKAL_STR-DATUM sy-vline 
WA_WPMKAL_STR-UTIME sy-vline 
WA_WPMKAL_STR-AENNR sy-vline 
WA_WPMKAL_STR-CHGFLAG sy-vline 
WA_WPMKAL_STR-MANDT sy-vline 
WA_WPMKAL_STR-MATNR sy-vline 
WA_WPMKAL_STR-WERKS sy-vline 
WA_WPMKAL_STR-VERID sy-vline 
WA_WPMKAL_STR-BDATU sy-vline 
WA_WPMKAL_STR-ADATU sy-vline 
WA_WPMKAL_STR-STLAL sy-vline 
WA_WPMKAL_STR-STLAN sy-vline 
WA_WPMKAL_STR-PLNTY sy-vline 
WA_WPMKAL_STR-PLNNR sy-vline 
WA_WPMKAL_STR-ALNAL sy-vline 
WA_WPMKAL_STR-BESKZ sy-vline 
WA_WPMKAL_STR-SOBSL sy-vline 
WA_WPMKAL_STR-LOSGR sy-vline 
WA_WPMKAL_STR-MDV01 sy-vline 
WA_WPMKAL_STR-MDV02 sy-vline 
WA_WPMKAL_STR-TEXT1 sy-vline 
WA_WPMKAL_STR-EWAHR sy-vline 
WA_WPMKAL_STR-VERTO sy-vline 
WA_WPMKAL_STR-SERKZ sy-vline 
WA_WPMKAL_STR-BSTMI sy-vline 
WA_WPMKAL_STR-BSTMA sy-vline 
WA_WPMKAL_STR-RGEKZ sy-vline 
WA_WPMKAL_STR-ALORT sy-vline 
WA_WPMKAL_STR-PLTYG sy-vline 
WA_WPMKAL_STR-PLNNG sy-vline 
WA_WPMKAL_STR-ALNAG sy-vline 
WA_WPMKAL_STR-PLTYM sy-vline 
WA_WPMKAL_STR-PLNNM sy-vline 
WA_WPMKAL_STR-ALNAM sy-vline 
WA_WPMKAL_STR-CSPLT sy-vline 
WA_WPMKAL_STR-MATKO sy-vline 
WA_WPMKAL_STR-ELPRO sy-vline 
WA_WPMKAL_STR-PRVBE sy-vline 
WA_WPMKAL_STR-PRFG_F sy-vline 
WA_WPMKAL_STR-PRDAT sy-vline 
WA_WPMKAL_STR-MKSP sy-vline 
WA_WPMKAL_STR-PRFG_R sy-vline 
WA_WPMKAL_STR-PRFG_G sy-vline 
WA_WPMKAL_STR-PRFG_S sy-vline 
WA_WPMKAL_STR-UCMAT sy-vline 
WA_WPMKAL_STR-VERSIND sy-vline 
WA_WPMKAL_STR-DIFFPLANEXEMSTR sy-vline 
WA_WPMKAL_STR-EWM_LGNUM sy-vline 
WA_WPMKAL_STR-EWM_LGPLA sy-vline 
WA_WPMKAL_STR-EXE_STLAL sy-vline 
WA_WPMKAL_STR-EXE_STLAN sy-vline 
WA_WPMKAL_STR-EXE_PLNTY sy-vline 
WA_WPMKAL_STR-EXE_PLNNR sy-vline 
WA_WPMKAL_STR-EXE_ALNAL sy-vline 
WA_WPMKAL_STR-PPEGUID sy-vline      INTO ld_text SEPARATED BY SPACE.

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