ABAP Select data from SAP table TXW_EIKP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TXW_EIKP 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_EIKP. 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_EIKP 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_EIKP TYPE STANDARD TABLE OF TXW_EIKP,
      WA_TXW_EIKP TYPE TXW_EIKP,
      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_EIKP> TYPE TXW_EIKP.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TXW_EIKP
*  INTO TABLE @DATA(IT_TXW_EIKP2).
*--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_EIKP INDEX 1 INTO DATA(WA_TXW_EIKP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TXW_EIKP>-MANDT = 1.
<TXW_EIKP>-EXNUM = 1.
<TXW_EIKP>-ALAND = 1.
<TXW_EIKP>-EXPVZ = 1.
<TXW_EIKP>-ZOLLA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TXW_EIKP-ZOLLB, sy-vline,
  WA_TXW_EIKP-ZOLL1, sy-vline,
  WA_TXW_EIKP-ZOLL2, sy-vline,
  WA_TXW_EIKP-ZOLL3, sy-vline,
  WA_TXW_EIKP-ZOLL4, sy-vline,
  WA_TXW_EIKP-ZOLL5, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TXW_EIKP 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_EIKP 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_EIKP INTO WA_TXW_EIKP.


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

*Conversion exit ALPHA, internal->external for field REFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_EIKP-REFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_EIKP-REFNR.
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_EIKP_STR, 
MANDT TYPE STRING,
EXNUM TYPE STRING,
ALAND TYPE STRING,
EXPVZ TYPE STRING,
ZOLLA TYPE STRING,
ZOLLB TYPE STRING,
ZOLL1 TYPE STRING,
ZOLL2 TYPE STRING,
ZOLL3 TYPE STRING,
ZOLL4 TYPE STRING,
ZOLL5 TYPE STRING,
ZOLL6 TYPE STRING,
KZGBE TYPE STRING,
KZABE TYPE STRING,
STGBE TYPE STRING,
STABE TYPE STRING,
CONTA TYPE STRING,
GRWCU TYPE STRING,
IEVER TYPE STRING,
SEGAL TYPE STRING,
WZOCU TYPE STRING,
PRONU TYPE STRING,
PRODA TYPE STRING,
VORPA TYPE STRING,
VORDA TYPE STRING,
VORNU TYPE STRING,
BEHOE TYPE STRING,
KENNU TYPE STRING,
VOISO TYPE STRING,
PREFPACOD TYPE STRING,
PREFA TYPE STRING,
PREFN TYPE STRING,
PREDU TYPE STRING,
PRISO TYPE STRING,
PRHOE TYPE STRING,
PRUEL TYPE STRING,
NACAR TYPE STRING,
NACNU TYPE STRING,
NACDA TYPE STRING,
NAISO TYPE STRING,
NAHOE TYPE STRING,
NAUEL TYPE STRING,
TEXT1 TYPE STRING,
TEXT2 TYPE STRING,
TEXT3 TYPE STRING,
EXDAR TYPE STRING,
EXDAA TYPE STRING,
EXDAB TYPE STRING,
EXDTA TYPE STRING,
EXDT2 TYPE STRING,
EXDTB TYPE STRING,
EXDPA TYPE STRING,
EXPRE TYPE STRING,
EXDT5 TYPE STRING,
LADEL TYPE STRING,
AUSFU TYPE STRING,
EIOKW TYPE STRING,
AUSOK TYPE STRING,
LAZL1 TYPE STRING,
LAZL2 TYPE STRING,
LAZL3 TYPE STRING,
LAZL4 TYPE STRING,
LAZL5 TYPE STRING,
LAZL6 TYPE STRING,
AZOLL TYPE STRING,
AHBAS TYPE STRING,
REFNR TYPE STRING,
MABSD TYPE STRING,
BFMAR TYPE STRING,
CUDCL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TXW_EIKP_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_EIKP_STR-MANDT sy-vline 
WA_TXW_EIKP_STR-EXNUM sy-vline 
WA_TXW_EIKP_STR-ALAND sy-vline 
WA_TXW_EIKP_STR-EXPVZ sy-vline 
WA_TXW_EIKP_STR-ZOLLA sy-vline 
WA_TXW_EIKP_STR-ZOLLB sy-vline 
WA_TXW_EIKP_STR-ZOLL1 sy-vline 
WA_TXW_EIKP_STR-ZOLL2 sy-vline 
WA_TXW_EIKP_STR-ZOLL3 sy-vline 
WA_TXW_EIKP_STR-ZOLL4 sy-vline 
WA_TXW_EIKP_STR-ZOLL5 sy-vline 
WA_TXW_EIKP_STR-ZOLL6 sy-vline 
WA_TXW_EIKP_STR-KZGBE sy-vline 
WA_TXW_EIKP_STR-KZABE sy-vline 
WA_TXW_EIKP_STR-STGBE sy-vline 
WA_TXW_EIKP_STR-STABE sy-vline 
WA_TXW_EIKP_STR-CONTA sy-vline 
WA_TXW_EIKP_STR-GRWCU sy-vline 
WA_TXW_EIKP_STR-IEVER sy-vline 
WA_TXW_EIKP_STR-SEGAL sy-vline 
WA_TXW_EIKP_STR-WZOCU sy-vline 
WA_TXW_EIKP_STR-PRONU sy-vline 
WA_TXW_EIKP_STR-PRODA sy-vline 
WA_TXW_EIKP_STR-VORPA sy-vline 
WA_TXW_EIKP_STR-VORDA sy-vline 
WA_TXW_EIKP_STR-VORNU sy-vline 
WA_TXW_EIKP_STR-BEHOE sy-vline 
WA_TXW_EIKP_STR-KENNU sy-vline 
WA_TXW_EIKP_STR-VOISO sy-vline 
WA_TXW_EIKP_STR-PREFPACOD sy-vline 
WA_TXW_EIKP_STR-PREFA sy-vline 
WA_TXW_EIKP_STR-PREFN sy-vline 
WA_TXW_EIKP_STR-PREDU sy-vline 
WA_TXW_EIKP_STR-PRISO sy-vline 
WA_TXW_EIKP_STR-PRHOE sy-vline 
WA_TXW_EIKP_STR-PRUEL sy-vline 
WA_TXW_EIKP_STR-NACAR sy-vline 
WA_TXW_EIKP_STR-NACNU sy-vline 
WA_TXW_EIKP_STR-NACDA sy-vline 
WA_TXW_EIKP_STR-NAISO sy-vline 
WA_TXW_EIKP_STR-NAHOE sy-vline 
WA_TXW_EIKP_STR-NAUEL sy-vline 
WA_TXW_EIKP_STR-TEXT1 sy-vline 
WA_TXW_EIKP_STR-TEXT2 sy-vline 
WA_TXW_EIKP_STR-TEXT3 sy-vline 
WA_TXW_EIKP_STR-EXDAR sy-vline 
WA_TXW_EIKP_STR-EXDAA sy-vline 
WA_TXW_EIKP_STR-EXDAB sy-vline 
WA_TXW_EIKP_STR-EXDTA sy-vline 
WA_TXW_EIKP_STR-EXDT2 sy-vline 
WA_TXW_EIKP_STR-EXDTB sy-vline 
WA_TXW_EIKP_STR-EXDPA sy-vline 
WA_TXW_EIKP_STR-EXPRE sy-vline 
WA_TXW_EIKP_STR-EXDT5 sy-vline 
WA_TXW_EIKP_STR-LADEL sy-vline 
WA_TXW_EIKP_STR-AUSFU sy-vline 
WA_TXW_EIKP_STR-EIOKW sy-vline 
WA_TXW_EIKP_STR-AUSOK sy-vline 
WA_TXW_EIKP_STR-LAZL1 sy-vline 
WA_TXW_EIKP_STR-LAZL2 sy-vline 
WA_TXW_EIKP_STR-LAZL3 sy-vline 
WA_TXW_EIKP_STR-LAZL4 sy-vline 
WA_TXW_EIKP_STR-LAZL5 sy-vline 
WA_TXW_EIKP_STR-LAZL6 sy-vline 
WA_TXW_EIKP_STR-AZOLL sy-vline 
WA_TXW_EIKP_STR-AHBAS sy-vline 
WA_TXW_EIKP_STR-REFNR sy-vline 
WA_TXW_EIKP_STR-MABSD sy-vline 
WA_TXW_EIKP_STR-BFMAR sy-vline 
WA_TXW_EIKP_STR-CUDCL sy-vline      INTO ld_text SEPARATED BY SPACE.

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