ABAP Select data from SAP table TXW_BUF_FI into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TXW_BUF_FI 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_BUF_FI. 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_BUF_FI 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_BUF_FI TYPE STANDARD TABLE OF TXW_BUF_FI,
      WA_TXW_BUF_FI TYPE TXW_BUF_FI,
      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_BUF_FI> TYPE TXW_BUF_FI.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TXW_BUF_FI
*  INTO TABLE @DATA(IT_TXW_BUF_FI2).
*--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_BUF_FI INDEX 1 INTO DATA(WA_TXW_BUF_FI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TXW_BUF_FI>-BUKRS = 1.
<TXW_BUF_FI>-BELNR = 1.
<TXW_BUF_FI>-BLART = 1.
<TXW_BUF_FI>-MONAT = 1.
<TXW_BUF_FI>-WAERS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TXW_BUF_FI-HWAE2, sy-vline,
  WA_TXW_BUF_FI-HWAE3, sy-vline,
  WA_TXW_BUF_FI-HWAER, sy-vline,
  WA_TXW_BUF_FI-AWTYP, sy-vline,
  WA_TXW_BUF_FI-AWKEY, sy-vline,
  WA_TXW_BUF_FI-AWSYS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TXW_BUF_FI 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_BUF_FI 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_BUF_FI INTO WA_TXW_BUF_FI.


*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_BUF_FI-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_BUF_FI-BELNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit GJAHR, internal->external for field GJAHR_CALC
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_TXW_BUF_FI-GJAHR_CALC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_BUF_FI-GJAHR_CALC.
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_BUF_FI_STR, 
BUKRS TYPE STRING,
BELNR TYPE STRING,
BLART TYPE STRING,
MONAT TYPE STRING,
WAERS TYPE STRING,
HWAE2 TYPE STRING,
HWAE3 TYPE STRING,
HWAER TYPE STRING,
AWTYP TYPE STRING,
AWKEY TYPE STRING,
AWSYS TYPE STRING,
CPUDT TYPE STRING,
BSTAT TYPE STRING,
GLVOR TYPE STRING,
RLDNR TYPE STRING,
LDGRP TYPE STRING,
LEDGER TYPE STRING,
GJAHR TYPE STRING,
GJAHR_CALC TYPE STRING,
MONAT_CALC TYPE STRING,
XBLNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TXW_BUF_FI_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_BUF_FI_STR-BUKRS sy-vline 
WA_TXW_BUF_FI_STR-BELNR sy-vline 
WA_TXW_BUF_FI_STR-BLART sy-vline 
WA_TXW_BUF_FI_STR-MONAT sy-vline 
WA_TXW_BUF_FI_STR-WAERS sy-vline 
WA_TXW_BUF_FI_STR-HWAE2 sy-vline 
WA_TXW_BUF_FI_STR-HWAE3 sy-vline 
WA_TXW_BUF_FI_STR-HWAER sy-vline 
WA_TXW_BUF_FI_STR-AWTYP sy-vline 
WA_TXW_BUF_FI_STR-AWKEY sy-vline 
WA_TXW_BUF_FI_STR-AWSYS sy-vline 
WA_TXW_BUF_FI_STR-CPUDT sy-vline 
WA_TXW_BUF_FI_STR-BSTAT sy-vline 
WA_TXW_BUF_FI_STR-GLVOR sy-vline 
WA_TXW_BUF_FI_STR-RLDNR sy-vline 
WA_TXW_BUF_FI_STR-LDGRP sy-vline 
WA_TXW_BUF_FI_STR-LEDGER sy-vline 
WA_TXW_BUF_FI_STR-GJAHR sy-vline 
WA_TXW_BUF_FI_STR-GJAHR_CALC sy-vline 
WA_TXW_BUF_FI_STR-MONAT_CALC sy-vline 
WA_TXW_BUF_FI_STR-XBLNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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