ABAP Select data from SAP table BWE_0PM_MAINTPOS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BWE_0PM_MAINTPOS 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 BWE_0PM_MAINTPOS. 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 BWE_0PM_MAINTPOS 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_BWE_0PM_MAINTPOS TYPE STANDARD TABLE OF BWE_0PM_MAINTPOS,
      WA_BWE_0PM_MAINTPOS TYPE BWE_0PM_MAINTPOS,
      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: <BWE_0PM_MAINTPOS> TYPE BWE_0PM_MAINTPOS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_BWE_0PM_MAINTPOS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM BWE_0PM_MAINTPOS
  INTO TABLE IT_BWE_0PM_MAINTPOS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BWE_0PM_MAINTPOS
*  INTO TABLE @DATA(IT_BWE_0PM_MAINTPOS2).
*--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_BWE_0PM_MAINTPOS INDEX 1 INTO DATA(WA_BWE_0PM_MAINTPOS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_BWE_0PM_MAINTPOS ASSIGNING <BWE_0PM_MAINTPOS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BWE_0PM_MAINTPOS>-ABCKZ = 1.
<BWE_0PM_MAINTPOS>-BUKRS = 1.
<BWE_0PM_MAINTPOS>-KOSTL = 1.
<BWE_0PM_MAINTPOS>-KOKRS = 1.
<BWE_0PM_MAINTPOS>-STORT = 1.

ENDLOOP.

LOOP AT IT_BWE_0PM_MAINTPOS INTO WA_BWE_0PM_MAINTPOS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BWE_0PM_MAINTPOS-SWERK, sy-vline,
  WA_BWE_0PM_MAINTPOS-MSGRP, sy-vline,
  WA_BWE_0PM_MAINTPOS-IWERK, sy-vline,
  WA_BWE_0PM_MAINTPOS-BEBER, sy-vline,
  WA_BWE_0PM_MAINTPOS-WPGRP, sy-vline,
  WA_BWE_0PM_MAINTPOS-GSBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BWE_0PM_MAINTPOS 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_BWE_0PM_MAINTPOS 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_BWE_0PM_MAINTPOS INTO WA_BWE_0PM_MAINTPOS.


*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 KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BWE_0PM_MAINTPOS-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWE_0PM_MAINTPOS-KOSTL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PROID
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_BWE_0PM_MAINTPOS-PROID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWE_0PM_MAINTPOS-PROID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EQUNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BWE_0PM_MAINTPOS-EQUNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWE_0PM_MAINTPOS-EQUNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TPLNR, internal->external for field TPLNR
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_BWE_0PM_MAINTPOS-TPLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWE_0PM_MAINTPOS-TPLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field BAUTL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_BWE_0PM_MAINTPOS-BAUTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWE_0PM_MAINTPOS-BAUTL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WAPOS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BWE_0PM_MAINTPOS-WAPOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWE_0PM_MAINTPOS-WAPOS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WARPL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BWE_0PM_MAINTPOS-WARPL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWE_0PM_MAINTPOS-WARPL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PLNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BWE_0PM_MAINTPOS-PLNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWE_0PM_MAINTPOS-PLNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PLNAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BWE_0PM_MAINTPOS-PLNAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWE_0PM_MAINTPOS-PLNAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BWE_0PM_MAINTPOS-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWE_0PM_MAINTPOS-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field POSID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_BWE_0PM_MAINTPOS-POSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWE_0PM_MAINTPOS-POSID.
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_BWE_0PM_MAINTPOS_STR, 
ABCKZ TYPE STRING,
BUKRS TYPE STRING,
KOSTL TYPE STRING,
KOKRS TYPE STRING,
STORT TYPE STRING,
SWERK TYPE STRING,
MSGRP TYPE STRING,
IWERK TYPE STRING,
BEBER TYPE STRING,
WPGRP TYPE STRING,
GSBER TYPE STRING,
VAPLZ TYPE STRING,
VAWRK TYPE STRING,
PROID TYPE STRING,
EQUNR TYPE STRING,
TPLNR TYPE STRING,
BAUTL TYPE STRING,
AUART TYPE STRING,
ILART TYPE STRING,
WAPOS TYPE STRING,
WARPL TYPE STRING,
WPPOS TYPE STRING,
WSTRA TYPE STRING,
PLNTY TYPE STRING,
PLNNR TYPE STRING,
PLNAL TYPE STRING,
MITYP TYPE STRING,
AUFNR TYPE STRING,
POSID TYPE STRING,
ERSDT TYPE STRING,
AEDAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BWE_0PM_MAINTPOS_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_BWE_0PM_MAINTPOS_STR-ABCKZ sy-vline 
WA_BWE_0PM_MAINTPOS_STR-BUKRS sy-vline 
WA_BWE_0PM_MAINTPOS_STR-KOSTL sy-vline 
WA_BWE_0PM_MAINTPOS_STR-KOKRS sy-vline 
WA_BWE_0PM_MAINTPOS_STR-STORT sy-vline 
WA_BWE_0PM_MAINTPOS_STR-SWERK sy-vline 
WA_BWE_0PM_MAINTPOS_STR-MSGRP sy-vline 
WA_BWE_0PM_MAINTPOS_STR-IWERK sy-vline 
WA_BWE_0PM_MAINTPOS_STR-BEBER sy-vline 
WA_BWE_0PM_MAINTPOS_STR-WPGRP sy-vline 
WA_BWE_0PM_MAINTPOS_STR-GSBER sy-vline 
WA_BWE_0PM_MAINTPOS_STR-VAPLZ sy-vline 
WA_BWE_0PM_MAINTPOS_STR-VAWRK sy-vline 
WA_BWE_0PM_MAINTPOS_STR-PROID sy-vline 
WA_BWE_0PM_MAINTPOS_STR-EQUNR sy-vline 
WA_BWE_0PM_MAINTPOS_STR-TPLNR sy-vline 
WA_BWE_0PM_MAINTPOS_STR-BAUTL sy-vline 
WA_BWE_0PM_MAINTPOS_STR-AUART sy-vline 
WA_BWE_0PM_MAINTPOS_STR-ILART sy-vline 
WA_BWE_0PM_MAINTPOS_STR-WAPOS sy-vline 
WA_BWE_0PM_MAINTPOS_STR-WARPL sy-vline 
WA_BWE_0PM_MAINTPOS_STR-WPPOS sy-vline 
WA_BWE_0PM_MAINTPOS_STR-WSTRA sy-vline 
WA_BWE_0PM_MAINTPOS_STR-PLNTY sy-vline 
WA_BWE_0PM_MAINTPOS_STR-PLNNR sy-vline 
WA_BWE_0PM_MAINTPOS_STR-PLNAL sy-vline 
WA_BWE_0PM_MAINTPOS_STR-MITYP sy-vline 
WA_BWE_0PM_MAINTPOS_STR-AUFNR sy-vline 
WA_BWE_0PM_MAINTPOS_STR-POSID sy-vline 
WA_BWE_0PM_MAINTPOS_STR-ERSDT sy-vline 
WA_BWE_0PM_MAINTPOS_STR-AEDAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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