ABAP Select data from SAP table TXW_S_ANEP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TXW_S_ANEP 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_S_ANEP. 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_S_ANEP 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_S_ANEP TYPE STANDARD TABLE OF TXW_S_ANEP,
      WA_TXW_S_ANEP TYPE TXW_S_ANEP,
      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_S_ANEP> TYPE TXW_S_ANEP.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TXW_S_ANEP
*  INTO TABLE @DATA(IT_TXW_S_ANEP2).
*--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_S_ANEP INDEX 1 INTO DATA(WA_TXW_S_ANEP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TXW_S_ANEP>-TXW_MANDT = 1.
<TXW_S_ANEP>-TXW_BUKRS = 1.
<TXW_S_ANEP>-TXW_ANLN1 = 1.
<TXW_S_ANEP>-TXW_ANLN2 = 1.
<TXW_S_ANEP>-TXW_GJAHR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TXW_S_ANEP-TXW_LNRAN, sy-vline,
  WA_TXW_S_ANEP-TXW_AFABE, sy-vline,
  WA_TXW_S_ANEP-TXW_ZUJHR, sy-vline,
  WA_TXW_S_ANEP-TXW_ZUCOD, sy-vline,
  WA_TXW_S_ANEP-MANDT, sy-vline,
  WA_TXW_S_ANEP-BUKRS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TXW_S_ANEP 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_S_ANEP 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_S_ANEP INTO WA_TXW_S_ANEP.


*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 TXW_ANLN1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_S_ANEP-TXW_ANLN1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_S_ANEP-TXW_ANLN1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TXW_ANLN2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_S_ANEP-TXW_ANLN2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_S_ANEP-TXW_ANLN2.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field ANLN1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_S_ANEP-ANLN1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_S_ANEP-ANLN1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLN2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_S_ANEP-ANLN2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_S_ANEP-ANLN2.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_S_ANEP-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_S_ANEP-BELNR.
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_S_ANEP_STR, 
TXW_MANDT TYPE STRING,
TXW_BUKRS TYPE STRING,
TXW_ANLN1 TYPE STRING,
TXW_ANLN2 TYPE STRING,
TXW_GJAHR TYPE STRING,
TXW_LNRAN TYPE STRING,
TXW_AFABE TYPE STRING,
TXW_ZUJHR TYPE STRING,
TXW_ZUCOD TYPE STRING,
MANDT TYPE STRING,
BUKRS TYPE STRING,
ANLN1 TYPE STRING,
ANLN2 TYPE STRING,
GJAHR TYPE STRING,
LNRAN TYPE STRING,
MONAT TYPE STRING,
AFABE TYPE STRING,
ZUJHR TYPE STRING,
ANBTR TYPE STRING,
BWASL TYPE STRING,
BZDAT TYPE STRING,
NAFAB TYPE STRING,
SAFAB TYPE STRING,
ZINSB TYPE STRING,
AWSYS TYPE STRING,
AWTYP TYPE STRING,
AWKEY TYPE STRING,
ZUCOD TYPE STRING,
BELNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TXW_S_ANEP_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_S_ANEP_STR-TXW_MANDT sy-vline 
WA_TXW_S_ANEP_STR-TXW_BUKRS sy-vline 
WA_TXW_S_ANEP_STR-TXW_ANLN1 sy-vline 
WA_TXW_S_ANEP_STR-TXW_ANLN2 sy-vline 
WA_TXW_S_ANEP_STR-TXW_GJAHR sy-vline 
WA_TXW_S_ANEP_STR-TXW_LNRAN sy-vline 
WA_TXW_S_ANEP_STR-TXW_AFABE sy-vline 
WA_TXW_S_ANEP_STR-TXW_ZUJHR sy-vline 
WA_TXW_S_ANEP_STR-TXW_ZUCOD sy-vline 
WA_TXW_S_ANEP_STR-MANDT sy-vline 
WA_TXW_S_ANEP_STR-BUKRS sy-vline 
WA_TXW_S_ANEP_STR-ANLN1 sy-vline 
WA_TXW_S_ANEP_STR-ANLN2 sy-vline 
WA_TXW_S_ANEP_STR-GJAHR sy-vline 
WA_TXW_S_ANEP_STR-LNRAN sy-vline 
WA_TXW_S_ANEP_STR-MONAT sy-vline 
WA_TXW_S_ANEP_STR-AFABE sy-vline 
WA_TXW_S_ANEP_STR-ZUJHR sy-vline 
WA_TXW_S_ANEP_STR-ANBTR sy-vline 
WA_TXW_S_ANEP_STR-BWASL sy-vline 
WA_TXW_S_ANEP_STR-BZDAT sy-vline 
WA_TXW_S_ANEP_STR-NAFAB sy-vline 
WA_TXW_S_ANEP_STR-SAFAB sy-vline 
WA_TXW_S_ANEP_STR-ZINSB sy-vline 
WA_TXW_S_ANEP_STR-AWSYS sy-vline 
WA_TXW_S_ANEP_STR-AWTYP sy-vline 
WA_TXW_S_ANEP_STR-AWKEY sy-vline 
WA_TXW_S_ANEP_STR-ZUCOD sy-vline 
WA_TXW_S_ANEP_STR-BELNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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