ABAP Select data from SAP table TXW_RC_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_RC_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_RC_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_RC_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_RC_POS TYPE STANDARD TABLE OF TXW_RC_POS,
      WA_TXW_RC_POS TYPE TXW_RC_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_RC_POS> TYPE TXW_RC_POS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TXW_RC_POS
*  INTO TABLE @DATA(IT_TXW_RC_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_RC_POS INDEX 1 INTO DATA(WA_TXW_RC_POS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TXW_RC_POS>-RCLNT = 1.
<TXW_RC_POS>-DOCNR = 1.
<TXW_RC_POS>-DOCLN = 1.
<TXW_RC_POS>-POPER = 1.
<TXW_RC_POS>-RYEAR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TXW_RC_POS-RBUKRS, sy-vline,
  WA_TXW_RC_POS-RACCT, sy-vline,
  WA_TXW_RC_POS-RBUSA, sy-vline,
  WA_TXW_RC_POS-RFAREA, sy-vline,
  WA_TXW_RC_POS-SBUKRS, sy-vline,
  WA_TXW_RC_POS-SACCT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TXW_RC_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_RC_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_RC_POS INTO WA_TXW_RC_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 ALPHA, internal->external for field DOCNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_RC_POS-DOCNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_RC_POS-DOCNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field SACCT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_RC_POS-SACCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_RC_POS-SACCT.
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_RC_POS_STR, 
RCLNT TYPE STRING,
DOCNR TYPE STRING,
DOCLN TYPE STRING,
POPER TYPE STRING,
RYEAR TYPE STRING,
RBUKRS TYPE STRING,
RACCT TYPE STRING,
RBUSA TYPE STRING,
RFAREA TYPE STRING,
SBUKRS TYPE STRING,
SACCT TYPE STRING,
SBUSA TYPE STRING,
SFAREA TYPE STRING,
KOKRS TYPE STRING,
RTCUR TYPE STRING,
TSL TYPE STRING,
HSL TYPE STRING,
BVORG TYPE STRING,
AWTYP TYPE STRING,
AWKEY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TXW_RC_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_RC_POS_STR-RCLNT sy-vline 
WA_TXW_RC_POS_STR-DOCNR sy-vline 
WA_TXW_RC_POS_STR-DOCLN sy-vline 
WA_TXW_RC_POS_STR-POPER sy-vline 
WA_TXW_RC_POS_STR-RYEAR sy-vline 
WA_TXW_RC_POS_STR-RBUKRS sy-vline 
WA_TXW_RC_POS_STR-RACCT sy-vline 
WA_TXW_RC_POS_STR-RBUSA sy-vline 
WA_TXW_RC_POS_STR-RFAREA sy-vline 
WA_TXW_RC_POS_STR-SBUKRS sy-vline 
WA_TXW_RC_POS_STR-SACCT sy-vline 
WA_TXW_RC_POS_STR-SBUSA sy-vline 
WA_TXW_RC_POS_STR-SFAREA sy-vline 
WA_TXW_RC_POS_STR-KOKRS sy-vline 
WA_TXW_RC_POS_STR-RTCUR sy-vline 
WA_TXW_RC_POS_STR-TSL sy-vline 
WA_TXW_RC_POS_STR-HSL sy-vline 
WA_TXW_RC_POS_STR-BVORG sy-vline 
WA_TXW_RC_POS_STR-AWTYP sy-vline 
WA_TXW_RC_POS_STR-AWKEY sy-vline      INTO ld_text SEPARATED BY SPACE.

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