ABAP Select data from SAP table TXW_MM_POS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TXW_MM_POS
*  INTO TABLE @DATA(IT_TXW_MM_POS2).
*--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_TXW_MM_POS INDEX 1 INTO DATA(WA_TXW_MM_POS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TXW_MM_POS>-MANDT = 1.
<TXW_MM_POS>-BUKRS = 1.
<TXW_MM_POS>-GJAHR = 1.
<TXW_MM_POS>-MBLNR = 1.
<TXW_MM_POS>-MJAHR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TXW_MM_POS-ZEILE, sy-vline,
  WA_TXW_MM_POS-MONAT, sy-vline,
  WA_TXW_MM_POS-BWART, sy-vline,
  WA_TXW_MM_POS-MATNR, sy-vline,
  WA_TXW_MM_POS-WERKS, sy-vline,
  WA_TXW_MM_POS-LGORT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TXW_MM_POS 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_TXW_MM_POS 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_TXW_MM_POS INTO WA_TXW_MM_POS.


*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 GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_TXW_MM_POS-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_MM_POS-GJAHR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field ANLN1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_MM_POS-ANLN1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_MM_POS-ANLN1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLN2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_MM_POS-ANLN2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_MM_POS-ANLN2.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

*Conversion exit ABPSN, internal->external for field WBS_POSID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_TXW_MM_POS-WBS_POSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_MM_POS-WBS_POSID.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit CUNIT, internal->external for field ERFME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_TXW_MM_POS-ERFME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_MM_POS-ERFME.
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_TXW_MM_POS_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
GJAHR TYPE STRING,
MBLNR TYPE STRING,
MJAHR TYPE STRING,
ZEILE TYPE STRING,
MONAT TYPE STRING,
BWART TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
SHKZG TYPE STRING,
DMBTR TYPE STRING,
MEINS TYPE STRING,
MENGE TYPE STRING,
BWTAR TYPE STRING,
SAKTO TYPE STRING,
LIFNR TYPE STRING,
KUNNR TYPE STRING,
GSBER TYPE STRING,
ANLN1 TYPE STRING,
ANLN2 TYPE STRING,
AUFNR TYPE STRING,
EMLIF TYPE STRING,
FKBER TYPE STRING,
GRUND TYPE STRING,
KDAUF TYPE STRING,
KDEIN TYPE STRING,
KDPOS TYPE STRING,
KOKRS TYPE STRING,
KOSTL TYPE STRING,
KZBEW TYPE STRING,
NPLNR TYPE STRING,
PARBU TYPE STRING,
PARGB TYPE STRING,
PPRCTR TYPE STRING,
PRCTR TYPE STRING,
PROJN TYPE STRING,
WBS_POSID TYPE STRING,
PS_PSP_PNR TYPE STRING,
SGTXT TYPE STRING,
SHKUM TYPE STRING,
SOBKZ TYPE STRING,
UMMAT TYPE STRING,
UMWRK TYPE STRING,
VPTNR TYPE STRING,
WAERS TYPE STRING,
WEUNB TYPE STRING,
XRUEJ TYPE STRING,
XRUEM TYPE STRING,
BNBTR TYPE STRING,
DMBUM TYPE STRING,
LBKUM TYPE STRING,
SALK3 TYPE STRING,
KZZUG TYPE STRING,
KZVBR TYPE STRING,
ERFMG TYPE STRING,
ERFME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TXW_MM_POS_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_TXW_MM_POS_STR-MANDT sy-vline 
WA_TXW_MM_POS_STR-BUKRS sy-vline 
WA_TXW_MM_POS_STR-GJAHR sy-vline 
WA_TXW_MM_POS_STR-MBLNR sy-vline 
WA_TXW_MM_POS_STR-MJAHR sy-vline 
WA_TXW_MM_POS_STR-ZEILE sy-vline 
WA_TXW_MM_POS_STR-MONAT sy-vline 
WA_TXW_MM_POS_STR-BWART sy-vline 
WA_TXW_MM_POS_STR-MATNR sy-vline 
WA_TXW_MM_POS_STR-WERKS sy-vline 
WA_TXW_MM_POS_STR-LGORT sy-vline 
WA_TXW_MM_POS_STR-CHARG sy-vline 
WA_TXW_MM_POS_STR-EBELN sy-vline 
WA_TXW_MM_POS_STR-EBELP sy-vline 
WA_TXW_MM_POS_STR-SHKZG sy-vline 
WA_TXW_MM_POS_STR-DMBTR sy-vline 
WA_TXW_MM_POS_STR-MEINS sy-vline 
WA_TXW_MM_POS_STR-MENGE sy-vline 
WA_TXW_MM_POS_STR-BWTAR sy-vline 
WA_TXW_MM_POS_STR-SAKTO sy-vline 
WA_TXW_MM_POS_STR-LIFNR sy-vline 
WA_TXW_MM_POS_STR-KUNNR sy-vline 
WA_TXW_MM_POS_STR-GSBER sy-vline 
WA_TXW_MM_POS_STR-ANLN1 sy-vline 
WA_TXW_MM_POS_STR-ANLN2 sy-vline 
WA_TXW_MM_POS_STR-AUFNR sy-vline 
WA_TXW_MM_POS_STR-EMLIF sy-vline 
WA_TXW_MM_POS_STR-FKBER sy-vline 
WA_TXW_MM_POS_STR-GRUND sy-vline 
WA_TXW_MM_POS_STR-KDAUF sy-vline 
WA_TXW_MM_POS_STR-KDEIN sy-vline 
WA_TXW_MM_POS_STR-KDPOS sy-vline 
WA_TXW_MM_POS_STR-KOKRS sy-vline 
WA_TXW_MM_POS_STR-KOSTL sy-vline 
WA_TXW_MM_POS_STR-KZBEW sy-vline 
WA_TXW_MM_POS_STR-NPLNR sy-vline 
WA_TXW_MM_POS_STR-PARBU sy-vline 
WA_TXW_MM_POS_STR-PARGB sy-vline 
WA_TXW_MM_POS_STR-PPRCTR sy-vline 
WA_TXW_MM_POS_STR-PRCTR sy-vline 
WA_TXW_MM_POS_STR-PROJN sy-vline 
WA_TXW_MM_POS_STR-WBS_POSID sy-vline 
WA_TXW_MM_POS_STR-PS_PSP_PNR sy-vline 
WA_TXW_MM_POS_STR-SGTXT sy-vline 
WA_TXW_MM_POS_STR-SHKUM sy-vline 
WA_TXW_MM_POS_STR-SOBKZ sy-vline 
WA_TXW_MM_POS_STR-UMMAT sy-vline 
WA_TXW_MM_POS_STR-UMWRK sy-vline 
WA_TXW_MM_POS_STR-VPTNR sy-vline 
WA_TXW_MM_POS_STR-WAERS sy-vline 
WA_TXW_MM_POS_STR-WEUNB sy-vline 
WA_TXW_MM_POS_STR-XRUEJ sy-vline 
WA_TXW_MM_POS_STR-XRUEM sy-vline 
WA_TXW_MM_POS_STR-BNBTR sy-vline 
WA_TXW_MM_POS_STR-DMBUM sy-vline 
WA_TXW_MM_POS_STR-LBKUM sy-vline 
WA_TXW_MM_POS_STR-SALK3 sy-vline 
WA_TXW_MM_POS_STR-KZZUG sy-vline 
WA_TXW_MM_POS_STR-KZVBR sy-vline 
WA_TXW_MM_POS_STR-ERFMG sy-vline 
WA_TXW_MM_POS_STR-ERFME sy-vline      INTO ld_text SEPARATED BY SPACE.

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