ABAP Select data from SAP table MCEKPOWWS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCEKPOWWS
*  INTO TABLE @DATA(IT_MCEKPOWWS2).
*--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_MCEKPOWWS INDEX 1 INTO DATA(WA_MCEKPOWWS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCEKPOWWS>-VKORG = 1.
<MCEKPOWWS>-VTWEG = 1.
<MCEKPOWWS>-BZIRK = 1.
<MCEKPOWWS>-DISPO = 1.
<MCEKPOWWS>-BTRKZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCEKPOWWS-ABTNR, sy-vline,
  WA_MCEKPOWWS-WGRU2, sy-vline,
  WA_MCEKPOWWS-WGRU1, sy-vline,
  WA_MCEKPOWWS-PRDHA, sy-vline,
  WA_MCEKPOWWS-MERK1, sy-vline,
  WA_MCEKPOWWS-MERK2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCEKPOWWS 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_MCEKPOWWS 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_MCEKPOWWS INTO WA_MCEKPOWWS.


*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 GJAHR, internal->external for field SAISJ
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MCEKPOWWS-SAISJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCEKPOWWS-SAISJ.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit EAN11, internal->external for field SEAN11
CALL FUNCTION 'CONVERSION_EXIT_EAN11_OUTPUT'
  EXPORTING
    input =                      WA_MCEKPOWWS-SEAN11
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCEKPOWWS-SEAN11.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ATINN, internal->external for field ATINM1
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_MCEKPOWWS-ATINM1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCEKPOWWS-ATINM1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ATINN, internal->external for field ATINM2
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_MCEKPOWWS-ATINM2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCEKPOWWS-ATINM2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ATINN, internal->external for field ATINM3
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_MCEKPOWWS-ATINM3
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCEKPOWWS-ATINM3.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit MATN1, internal->external for field ADDI1
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MCEKPOWWS-ADDI1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCEKPOWWS-ADDI1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field ADDI2
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MCEKPOWWS-ADDI2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCEKPOWWS-ADDI2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field ADDI3
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MCEKPOWWS-ADDI3
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCEKPOWWS-ADDI3.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field ASORT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MCEKPOWWS-ASORT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCEKPOWWS-ASORT.
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_MCEKPOWWS_STR, 
VKORG TYPE STRING,
VTWEG TYPE STRING,
BZIRK TYPE STRING,
DISPO TYPE STRING,
BTRKZ TYPE STRING,
ABTNR TYPE STRING,
WGRU2 TYPE STRING,
WGRU1 TYPE STRING,
PRDHA TYPE STRING,
MERK1 TYPE STRING,
MERK2 TYPE STRING,
MERK3 TYPE STRING,
AKTYP TYPE STRING,
AKTHE TYPE STRING,
PLGTP TYPE STRING,
SAISO TYPE STRING,
SAISJ TYPE STRING,
BWVOR TYPE STRING,
BWSCL TYPE STRING,
SERVG TYPE STRING,
WRKGR2 TYPE STRING,
WRKGR1 TYPE STRING,
MTART TYPE STRING,
WMAKG TYPE STRING,
RLIFNR TYPE STRING,
LAND1 TYPE STRING,
RLTSNR TYPE STRING,
RKOLIF TYPE STRING,
RIDNLF TYPE STRING,
EKORG TYPE STRING,
EKSGB TYPE STRING,
EKGRP TYPE STRING,
SMATKL TYPE STRING,
SEAN11 TYPE STRING,
IDNLF TYPE STRING,
KOLIF TYPE STRING,
ATINM1 TYPE STRING,
ATINM2 TYPE STRING,
ATINM3 TYPE STRING,
ULEKGRP TYPE STRING,
ULEKORG TYPE STRING,
ULVKORG TYPE STRING,
ULVTWEG TYPE STRING,
ULBZIRK TYPE STRING,
ULBTRKZ TYPE STRING,
STRNR TYPE STRING,
ATTYP TYPE STRING,
SSTUF TYPE STRING,
BVLMNG TYPE STRING,
BVLGEO TYPE STRING,
BVLGVO TYPE STRING,
BVLGVP TYPE STRING,
BVLGEW TYPE STRING,
BVLVOL TYPE STRING,
VKWRT TYPE STRING,
VKWRA TYPE STRING,
ABELN TYPE STRING,
WKUNNR TYPE STRING,
AUREL TYPE STRING,
RPLREL TYPE STRING,
ADDMNG TYPE STRING,
ADDANZ TYPE STRING,
ADDTIM TYPE STRING,
ADDKMW TYPE STRING,
ADDKAL TYPE STRING,
ADDIAPPL TYPE STRING,
ADDI1 TYPE STRING,
ADDI2 TYPE STRING,
ADDI3 TYPE STRING,
BWVORG TYPE STRING,
FILGRP TYPE STRING,
PSWAE TYPE STRING,
PLMHT TYPE STRING,
ASORT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCEKPOWWS_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_MCEKPOWWS_STR-VKORG sy-vline 
WA_MCEKPOWWS_STR-VTWEG sy-vline 
WA_MCEKPOWWS_STR-BZIRK sy-vline 
WA_MCEKPOWWS_STR-DISPO sy-vline 
WA_MCEKPOWWS_STR-BTRKZ sy-vline 
WA_MCEKPOWWS_STR-ABTNR sy-vline 
WA_MCEKPOWWS_STR-WGRU2 sy-vline 
WA_MCEKPOWWS_STR-WGRU1 sy-vline 
WA_MCEKPOWWS_STR-PRDHA sy-vline 
WA_MCEKPOWWS_STR-MERK1 sy-vline 
WA_MCEKPOWWS_STR-MERK2 sy-vline 
WA_MCEKPOWWS_STR-MERK3 sy-vline 
WA_MCEKPOWWS_STR-AKTYP sy-vline 
WA_MCEKPOWWS_STR-AKTHE sy-vline 
WA_MCEKPOWWS_STR-PLGTP sy-vline 
WA_MCEKPOWWS_STR-SAISO sy-vline 
WA_MCEKPOWWS_STR-SAISJ sy-vline 
WA_MCEKPOWWS_STR-BWVOR sy-vline 
WA_MCEKPOWWS_STR-BWSCL sy-vline 
WA_MCEKPOWWS_STR-SERVG sy-vline 
WA_MCEKPOWWS_STR-WRKGR2 sy-vline 
WA_MCEKPOWWS_STR-WRKGR1 sy-vline 
WA_MCEKPOWWS_STR-MTART sy-vline 
WA_MCEKPOWWS_STR-WMAKG sy-vline 
WA_MCEKPOWWS_STR-RLIFNR sy-vline 
WA_MCEKPOWWS_STR-LAND1 sy-vline 
WA_MCEKPOWWS_STR-RLTSNR sy-vline 
WA_MCEKPOWWS_STR-RKOLIF sy-vline 
WA_MCEKPOWWS_STR-RIDNLF sy-vline 
WA_MCEKPOWWS_STR-EKORG sy-vline 
WA_MCEKPOWWS_STR-EKSGB sy-vline 
WA_MCEKPOWWS_STR-EKGRP sy-vline 
WA_MCEKPOWWS_STR-SMATKL sy-vline 
WA_MCEKPOWWS_STR-SEAN11 sy-vline 
WA_MCEKPOWWS_STR-IDNLF sy-vline 
WA_MCEKPOWWS_STR-KOLIF sy-vline 
WA_MCEKPOWWS_STR-ATINM1 sy-vline 
WA_MCEKPOWWS_STR-ATINM2 sy-vline 
WA_MCEKPOWWS_STR-ATINM3 sy-vline 
WA_MCEKPOWWS_STR-ULEKGRP sy-vline 
WA_MCEKPOWWS_STR-ULEKORG sy-vline 
WA_MCEKPOWWS_STR-ULVKORG sy-vline 
WA_MCEKPOWWS_STR-ULVTWEG sy-vline 
WA_MCEKPOWWS_STR-ULBZIRK sy-vline 
WA_MCEKPOWWS_STR-ULBTRKZ sy-vline 
WA_MCEKPOWWS_STR-STRNR sy-vline 
WA_MCEKPOWWS_STR-ATTYP sy-vline 
WA_MCEKPOWWS_STR-SSTUF sy-vline 
WA_MCEKPOWWS_STR-BVLMNG sy-vline 
WA_MCEKPOWWS_STR-BVLGEO sy-vline 
WA_MCEKPOWWS_STR-BVLGVO sy-vline 
WA_MCEKPOWWS_STR-BVLGVP sy-vline 
WA_MCEKPOWWS_STR-BVLGEW sy-vline 
WA_MCEKPOWWS_STR-BVLVOL sy-vline 
WA_MCEKPOWWS_STR-VKWRT sy-vline 
WA_MCEKPOWWS_STR-VKWRA sy-vline 
WA_MCEKPOWWS_STR-ABELN sy-vline 
WA_MCEKPOWWS_STR-WKUNNR sy-vline 
WA_MCEKPOWWS_STR-AUREL sy-vline 
WA_MCEKPOWWS_STR-RPLREL sy-vline 
WA_MCEKPOWWS_STR-ADDMNG sy-vline 
WA_MCEKPOWWS_STR-ADDANZ sy-vline 
WA_MCEKPOWWS_STR-ADDTIM sy-vline 
WA_MCEKPOWWS_STR-ADDKMW sy-vline 
WA_MCEKPOWWS_STR-ADDKAL sy-vline 
WA_MCEKPOWWS_STR-ADDIAPPL sy-vline 
WA_MCEKPOWWS_STR-ADDI1 sy-vline 
WA_MCEKPOWWS_STR-ADDI2 sy-vline 
WA_MCEKPOWWS_STR-ADDI3 sy-vline 
WA_MCEKPOWWS_STR-BWVORG sy-vline 
WA_MCEKPOWWS_STR-FILGRP sy-vline 
WA_MCEKPOWWS_STR-PSWAE sy-vline 
WA_MCEKPOWWS_STR-PLMHT sy-vline 
WA_MCEKPOWWS_STR-ASORT sy-vline      INTO ld_text SEPARATED BY SPACE.

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