ABAP Select data from SAP table ETXDCH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ETXDCH
*  INTO TABLE @DATA(IT_ETXDCH2).
*--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_ETXDCH INDEX 1 INTO DATA(WA_ETXDCH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ETXDCH>-MANDT = 1.
<ETXDCH>-DOCNR = 1.
<ETXDCH>-AWTYP = 1.
<ETXDCH>-AWREF = 1.
<ETXDCH>-AWORG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ETXDCH-AWSYS, sy-vline,
  WA_ETXDCH-DOCSTATUS, sy-vline,
  WA_ETXDCH-DOCSTATUSCHANGED, sy-vline,
  WA_ETXDCH-CREATEDON, sy-vline,
  WA_ETXDCH-CREATEDBY, sy-vline,
  WA_ETXDCH-TID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ETXDCH 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_ETXDCH 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_ETXDCH INTO WA_ETXDCH.


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

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

*Conversion exit ALPHA, internal->external for field SYST_NAME
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ETXDCH-SYST_NAME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ETXDCH-SYST_NAME.
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_ETXDCH_STR, 
MANDT TYPE STRING,
DOCNR TYPE STRING,
AWTYP TYPE STRING,
AWREF TYPE STRING,
AWORG TYPE STRING,
AWSYS TYPE STRING,
DOCSTATUS TYPE STRING,
DOCSTATUSCHANGED TYPE STRING,
CREATEDON TYPE STRING,
CREATEDBY TYPE STRING,
TID TYPE STRING,
GLTAX TYPE STRING,
TXDEF TYPE STRING,
DEFAULT_REASON TYPE STRING,
INCON TYPE STRING,
EXCON TYPE STRING,
UFLAG TYPE STRING,
UDATE TYPE STRING,
USNAM TYPE STRING,
SYST_NAME TYPE STRING,
CLIENT TYPE STRING,
COMP_CODE TYPE STRING,
DOC_NUMBER TYPE STRING,
CURRENCY TYPE STRING,
CURR_DEC TYPE STRING,
TXJCD_L1 TYPE STRING,
TXJCD_L2 TYPE STRING,
TXJCD_L3 TYPE STRING,
TXJCD_L4 TYPE STRING,
TAX_PER_ITEM TYPE STRING,
NR_LINE_ITEMS TYPE STRING,
IS_UJCS_ACTIVE TYPE STRING,
API_VERSION TYPE STRING,
GL_CURRENCY TYPE STRING,
GL_CURR_DEC TYPE STRING,
REP_DATE TYPE STRING,
RATEDEC TYPE STRING,
XEXTN TYPE STRING,
INTERF_VERSION TYPE STRING,
TAX_PROCEDURE TYPE STRING,
ERRCODE TYPE STRING,
ERROR_LINE TYPE STRING,
ERRMSG TYPE STRING,
REC_STATUS TYPE STRING,
FEED_COUNT TYPE STRING,
_DATAAGING TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ETXDCH_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_ETXDCH_STR-MANDT sy-vline 
WA_ETXDCH_STR-DOCNR sy-vline 
WA_ETXDCH_STR-AWTYP sy-vline 
WA_ETXDCH_STR-AWREF sy-vline 
WA_ETXDCH_STR-AWORG sy-vline 
WA_ETXDCH_STR-AWSYS sy-vline 
WA_ETXDCH_STR-DOCSTATUS sy-vline 
WA_ETXDCH_STR-DOCSTATUSCHANGED sy-vline 
WA_ETXDCH_STR-CREATEDON sy-vline 
WA_ETXDCH_STR-CREATEDBY sy-vline 
WA_ETXDCH_STR-TID sy-vline 
WA_ETXDCH_STR-GLTAX sy-vline 
WA_ETXDCH_STR-TXDEF sy-vline 
WA_ETXDCH_STR-DEFAULT_REASON sy-vline 
WA_ETXDCH_STR-INCON sy-vline 
WA_ETXDCH_STR-EXCON sy-vline 
WA_ETXDCH_STR-UFLAG sy-vline 
WA_ETXDCH_STR-UDATE sy-vline 
WA_ETXDCH_STR-USNAM sy-vline 
WA_ETXDCH_STR-SYST_NAME sy-vline 
WA_ETXDCH_STR-CLIENT sy-vline 
WA_ETXDCH_STR-COMP_CODE sy-vline 
WA_ETXDCH_STR-DOC_NUMBER sy-vline 
WA_ETXDCH_STR-CURRENCY sy-vline 
WA_ETXDCH_STR-CURR_DEC sy-vline 
WA_ETXDCH_STR-TXJCD_L1 sy-vline 
WA_ETXDCH_STR-TXJCD_L2 sy-vline 
WA_ETXDCH_STR-TXJCD_L3 sy-vline 
WA_ETXDCH_STR-TXJCD_L4 sy-vline 
WA_ETXDCH_STR-TAX_PER_ITEM sy-vline 
WA_ETXDCH_STR-NR_LINE_ITEMS sy-vline 
WA_ETXDCH_STR-IS_UJCS_ACTIVE sy-vline 
WA_ETXDCH_STR-API_VERSION sy-vline 
WA_ETXDCH_STR-GL_CURRENCY sy-vline 
WA_ETXDCH_STR-GL_CURR_DEC sy-vline 
WA_ETXDCH_STR-REP_DATE sy-vline 
WA_ETXDCH_STR-RATEDEC sy-vline 
WA_ETXDCH_STR-XEXTN sy-vline 
WA_ETXDCH_STR-INTERF_VERSION sy-vline 
WA_ETXDCH_STR-TAX_PROCEDURE sy-vline 
WA_ETXDCH_STR-ERRCODE sy-vline 
WA_ETXDCH_STR-ERROR_LINE sy-vline 
WA_ETXDCH_STR-ERRMSG sy-vline 
WA_ETXDCH_STR-REC_STATUS sy-vline 
WA_ETXDCH_STR-FEED_COUNT sy-vline 
WA_ETXDCH_STR-_DATAAGING sy-vline      INTO ld_text SEPARATED BY SPACE.

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