ABAP Select data from SAP table TXW_CO2POS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TXW_CO2POS 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_CO2POS. 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_CO2POS 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_CO2POS TYPE STANDARD TABLE OF TXW_CO2POS,
      WA_TXW_CO2POS TYPE TXW_CO2POS,
      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_CO2POS> TYPE TXW_CO2POS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TXW_CO2POS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TXW_CO2POS
  INTO TABLE IT_TXW_CO2POS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TXW_CO2POS
*  INTO TABLE @DATA(IT_TXW_CO2POS2).
*--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_CO2POS INDEX 1 INTO DATA(WA_TXW_CO2POS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TXW_CO2POS ASSIGNING <TXW_CO2POS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TXW_CO2POS>-MANDT = 1.
<TXW_CO2POS>-KOKRS = 1.
<TXW_CO2POS>-BELNR = 1.
<TXW_CO2POS>-BUZEI = 1.
<TXW_CO2POS>-PERIO = 1.

ENDLOOP.

LOOP AT IT_TXW_CO2POS INTO WA_TXW_CO2POS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TXW_CO2POS-GJAHR, sy-vline,
  WA_TXW_CO2POS-KSTAR, sy-vline,
  WA_TXW_CO2POS-HRKFT, sy-vline,
  WA_TXW_CO2POS-VRGNG, sy-vline,
  WA_TXW_CO2POS-BUKRS, sy-vline,
  WA_TXW_CO2POS-GSBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TXW_CO2POS 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_CO2POS 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_CO2POS INTO WA_TXW_CO2POS.


*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 BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_CO2POS-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_CO2POS-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_TXW_CO2POS-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_CO2POS-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KSTAR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_CO2POS-KSTAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_CO2POS-KSTAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit BEKNZ, internal->external for field BEKNZ
CALL FUNCTION 'CONVERSION_EXIT_BEKNZ_OUTPUT'
  EXPORTING
    input =                      WA_TXW_CO2POS-BEKNZ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_CO2POS-BEKNZ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit REFBT, internal->external for field RBEST
CALL FUNCTION 'CONVERSION_EXIT_REFBT_OUTPUT'
  EXPORTING
    input =                      WA_TXW_CO2POS-RBEST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_CO2POS-RBEST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBUND
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_CO2POS-VBUND
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_CO2POS-VBUND.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PKSTAR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_CO2POS-PKSTAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_CO2POS-PKSTAR.
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_CO2POS_STR, 
MANDT TYPE STRING,
KOKRS TYPE STRING,
BELNR TYPE STRING,
BUZEI TYPE STRING,
PERIO TYPE STRING,
GJAHR TYPE STRING,
KSTAR TYPE STRING,
HRKFT TYPE STRING,
VRGNG TYPE STRING,
BUKRS TYPE STRING,
GSBER TYPE STRING,
BEKNZ TYPE STRING,
WKGBTR TYPE STRING,
OBJNR TYPE STRING,
OBJNRT TYPE STRING,
FKBER TYPE STRING,
RBEST TYPE STRING,
REFBZ TYPE STRING,
SGTXT TYPE STRING,
USPOB TYPE STRING,
USPOBT TYPE STRING,
VBUND TYPE STRING,
WERKS TYPE STRING,
PARGB TYPE STRING,
PAROB1 TYPE STRING,
PAROB1T TYPE STRING,
PBUKRS TYPE STRING,
PFKBER TYPE STRING,
PKSTAR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TXW_CO2POS_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_CO2POS_STR-MANDT sy-vline 
WA_TXW_CO2POS_STR-KOKRS sy-vline 
WA_TXW_CO2POS_STR-BELNR sy-vline 
WA_TXW_CO2POS_STR-BUZEI sy-vline 
WA_TXW_CO2POS_STR-PERIO sy-vline 
WA_TXW_CO2POS_STR-GJAHR sy-vline 
WA_TXW_CO2POS_STR-KSTAR sy-vline 
WA_TXW_CO2POS_STR-HRKFT sy-vline 
WA_TXW_CO2POS_STR-VRGNG sy-vline 
WA_TXW_CO2POS_STR-BUKRS sy-vline 
WA_TXW_CO2POS_STR-GSBER sy-vline 
WA_TXW_CO2POS_STR-BEKNZ sy-vline 
WA_TXW_CO2POS_STR-WKGBTR sy-vline 
WA_TXW_CO2POS_STR-OBJNR sy-vline 
WA_TXW_CO2POS_STR-OBJNRT sy-vline 
WA_TXW_CO2POS_STR-FKBER sy-vline 
WA_TXW_CO2POS_STR-RBEST sy-vline 
WA_TXW_CO2POS_STR-REFBZ sy-vline 
WA_TXW_CO2POS_STR-SGTXT sy-vline 
WA_TXW_CO2POS_STR-USPOB sy-vline 
WA_TXW_CO2POS_STR-USPOBT sy-vline 
WA_TXW_CO2POS_STR-VBUND sy-vline 
WA_TXW_CO2POS_STR-WERKS sy-vline 
WA_TXW_CO2POS_STR-PARGB sy-vline 
WA_TXW_CO2POS_STR-PAROB1 sy-vline 
WA_TXW_CO2POS_STR-PAROB1T sy-vline 
WA_TXW_CO2POS_STR-PBUKRS sy-vline 
WA_TXW_CO2POS_STR-PFKBER sy-vline 
WA_TXW_CO2POS_STR-PKSTAR sy-vline      INTO ld_text SEPARATED BY SPACE.

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