ABAP Select data from SAP table TXW_FI_HD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TXW_FI_HD 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_FI_HD. 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_FI_HD 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_FI_HD TYPE STANDARD TABLE OF TXW_FI_HD,
      WA_TXW_FI_HD TYPE TXW_FI_HD,
      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_FI_HD> TYPE TXW_FI_HD.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TXW_FI_HD
*  INTO TABLE @DATA(IT_TXW_FI_HD2).
*--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_FI_HD INDEX 1 INTO DATA(WA_TXW_FI_HD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TXW_FI_HD>-MANDT = 1.
<TXW_FI_HD>-BUKRS = 1.
<TXW_FI_HD>-BELNR = 1.
<TXW_FI_HD>-GJAHR = 1.
<TXW_FI_HD>-MONAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TXW_FI_HD-BLART, sy-vline,
  WA_TXW_FI_HD-BUDAT, sy-vline,
  WA_TXW_FI_HD-BLDAT, sy-vline,
  WA_TXW_FI_HD-BVORG, sy-vline,
  WA_TXW_FI_HD-WWERT, sy-vline,
  WA_TXW_FI_HD-XBLNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TXW_FI_HD 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_FI_HD 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_FI_HD INTO WA_TXW_FI_HD.


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

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

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

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

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

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

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

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

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

*Conversion exit GJAHR, internal->external for field GJAHR_CALC
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_TXW_FI_HD-GJAHR_CALC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_FI_HD-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_FI_HD_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
MONAT TYPE STRING,
BLART TYPE STRING,
BUDAT TYPE STRING,
BLDAT TYPE STRING,
BVORG TYPE STRING,
WWERT TYPE STRING,
XBLNR TYPE STRING,
BKTXT TYPE STRING,
WAERS TYPE STRING,
KURSF TYPE STRING,
GLVOR TYPE STRING,
HWAE2 TYPE STRING,
HWAE3 TYPE STRING,
DBBLG TYPE STRING,
DOKID TYPE STRING,
HWAER TYPE STRING,
KZWRS TYPE STRING,
KZKRS TYPE STRING,
STBLG TYPE STRING,
STJAH TYPE STRING,
USNAM TYPE STRING,
XRUEB TYPE STRING,
AWORG TYPE STRING,
AWREF TYPE STRING,
AWSYS TYPE STRING,
AWTYP TYPE STRING,
AWKEY TYPE STRING,
CPUDT TYPE STRING,
TCODE TYPE STRING,
RLDNR TYPE STRING,
LDGRP TYPE STRING,
BSTAT TYPE STRING,
LEDGER TYPE STRING,
VATDATE TYPE STRING,
XMWST TYPE STRING,
XREF1_HD TYPE STRING,
XREF2_HD TYPE STRING,
BELNR_18 TYPE STRING,
GJAHR_CALC TYPE STRING,
MONAT_CALC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TXW_FI_HD_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_FI_HD_STR-MANDT sy-vline 
WA_TXW_FI_HD_STR-BUKRS sy-vline 
WA_TXW_FI_HD_STR-BELNR sy-vline 
WA_TXW_FI_HD_STR-GJAHR sy-vline 
WA_TXW_FI_HD_STR-MONAT sy-vline 
WA_TXW_FI_HD_STR-BLART sy-vline 
WA_TXW_FI_HD_STR-BUDAT sy-vline 
WA_TXW_FI_HD_STR-BLDAT sy-vline 
WA_TXW_FI_HD_STR-BVORG sy-vline 
WA_TXW_FI_HD_STR-WWERT sy-vline 
WA_TXW_FI_HD_STR-XBLNR sy-vline 
WA_TXW_FI_HD_STR-BKTXT sy-vline 
WA_TXW_FI_HD_STR-WAERS sy-vline 
WA_TXW_FI_HD_STR-KURSF sy-vline 
WA_TXW_FI_HD_STR-GLVOR sy-vline 
WA_TXW_FI_HD_STR-HWAE2 sy-vline 
WA_TXW_FI_HD_STR-HWAE3 sy-vline 
WA_TXW_FI_HD_STR-DBBLG sy-vline 
WA_TXW_FI_HD_STR-DOKID sy-vline 
WA_TXW_FI_HD_STR-HWAER sy-vline 
WA_TXW_FI_HD_STR-KZWRS sy-vline 
WA_TXW_FI_HD_STR-KZKRS sy-vline 
WA_TXW_FI_HD_STR-STBLG sy-vline 
WA_TXW_FI_HD_STR-STJAH sy-vline 
WA_TXW_FI_HD_STR-USNAM sy-vline 
WA_TXW_FI_HD_STR-XRUEB sy-vline 
WA_TXW_FI_HD_STR-AWORG sy-vline 
WA_TXW_FI_HD_STR-AWREF sy-vline 
WA_TXW_FI_HD_STR-AWSYS sy-vline 
WA_TXW_FI_HD_STR-AWTYP sy-vline 
WA_TXW_FI_HD_STR-AWKEY sy-vline 
WA_TXW_FI_HD_STR-CPUDT sy-vline 
WA_TXW_FI_HD_STR-TCODE sy-vline 
WA_TXW_FI_HD_STR-RLDNR sy-vline 
WA_TXW_FI_HD_STR-LDGRP sy-vline 
WA_TXW_FI_HD_STR-BSTAT sy-vline 
WA_TXW_FI_HD_STR-LEDGER sy-vline 
WA_TXW_FI_HD_STR-VATDATE sy-vline 
WA_TXW_FI_HD_STR-XMWST sy-vline 
WA_TXW_FI_HD_STR-XREF1_HD sy-vline 
WA_TXW_FI_HD_STR-XREF2_HD sy-vline 
WA_TXW_FI_HD_STR-BELNR_18 sy-vline 
WA_TXW_FI_HD_STR-GJAHR_CALC sy-vline 
WA_TXW_FI_HD_STR-MONAT_CALC sy-vline      INTO ld_text SEPARATED BY SPACE.

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