ABAP Select data from SAP table TXW_AS_PRV into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TXW_AS_PRV 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_AS_PRV. 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_AS_PRV 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_AS_PRV TYPE STANDARD TABLE OF TXW_AS_PRV,
      WA_TXW_AS_PRV TYPE TXW_AS_PRV,
      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_AS_PRV> TYPE TXW_AS_PRV.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TXW_AS_PRV
*  INTO TABLE @DATA(IT_TXW_AS_PRV2).
*--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_AS_PRV INDEX 1 INTO DATA(WA_TXW_AS_PRV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TXW_AS_PRV>-MANDT = 1.
<TXW_AS_PRV>-BUKRS = 1.
<TXW_AS_PRV>-ANLN1 = 1.
<TXW_AS_PRV>-ANLN2 = 1.
<TXW_AS_PRV>-GJAHR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TXW_AS_PRV-MONAT, sy-vline,
  WA_TXW_AS_PRV-LNRAN, sy-vline,
  WA_TXW_AS_PRV-AFABE, sy-vline,
  WA_TXW_AS_PRV-ZUJHR, sy-vline,
  WA_TXW_AS_PRV-ZUCOD, sy-vline,
  WA_TXW_AS_PRV-ERLBT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TXW_AS_PRV 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_AS_PRV 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_AS_PRV INTO WA_TXW_AS_PRV.


*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 ANLN1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_AS_PRV-ANLN1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_AS_PRV-ANLN1.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field AWSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_AS_PRV-AWSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_AS_PRV-AWSYS.
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_AS_PRV_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
ANLN1 TYPE STRING,
ANLN2 TYPE STRING,
GJAHR TYPE STRING,
MONAT TYPE STRING,
LNRAN TYPE STRING,
AFABE TYPE STRING,
ZUJHR TYPE STRING,
ZUCOD TYPE STRING,
ERLBT TYPE STRING,
INVZL TYPE STRING,
INVZV TYPE STRING,
MAFAL TYPE STRING,
MAFAV TYPE STRING,
NAFAL TYPE STRING,
NAFAV TYPE STRING,
SANWV TYPE STRING,
VERKO TYPE STRING,
AWSYS TYPE STRING,
AWTYP TYPE STRING,
AWKEY TYPE STRING,
SAFAV TYPE STRING,
AAFAV TYPE STRING,
SAFAL TYPE STRING,
AAFAL TYPE STRING,
AUFNL TYPE STRING,
AUFNV TYPE STRING,
AUFWL TYPE STRING,
AUFWV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TXW_AS_PRV_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_AS_PRV_STR-MANDT sy-vline 
WA_TXW_AS_PRV_STR-BUKRS sy-vline 
WA_TXW_AS_PRV_STR-ANLN1 sy-vline 
WA_TXW_AS_PRV_STR-ANLN2 sy-vline 
WA_TXW_AS_PRV_STR-GJAHR sy-vline 
WA_TXW_AS_PRV_STR-MONAT sy-vline 
WA_TXW_AS_PRV_STR-LNRAN sy-vline 
WA_TXW_AS_PRV_STR-AFABE sy-vline 
WA_TXW_AS_PRV_STR-ZUJHR sy-vline 
WA_TXW_AS_PRV_STR-ZUCOD sy-vline 
WA_TXW_AS_PRV_STR-ERLBT sy-vline 
WA_TXW_AS_PRV_STR-INVZL sy-vline 
WA_TXW_AS_PRV_STR-INVZV sy-vline 
WA_TXW_AS_PRV_STR-MAFAL sy-vline 
WA_TXW_AS_PRV_STR-MAFAV sy-vline 
WA_TXW_AS_PRV_STR-NAFAL sy-vline 
WA_TXW_AS_PRV_STR-NAFAV sy-vline 
WA_TXW_AS_PRV_STR-SANWV sy-vline 
WA_TXW_AS_PRV_STR-VERKO sy-vline 
WA_TXW_AS_PRV_STR-AWSYS sy-vline 
WA_TXW_AS_PRV_STR-AWTYP sy-vline 
WA_TXW_AS_PRV_STR-AWKEY sy-vline 
WA_TXW_AS_PRV_STR-SAFAV sy-vline 
WA_TXW_AS_PRV_STR-AAFAV sy-vline 
WA_TXW_AS_PRV_STR-SAFAL sy-vline 
WA_TXW_AS_PRV_STR-AAFAL sy-vline 
WA_TXW_AS_PRV_STR-AUFNL sy-vline 
WA_TXW_AS_PRV_STR-AUFNV sy-vline 
WA_TXW_AS_PRV_STR-AUFWL sy-vline 
WA_TXW_AS_PRV_STR-AUFWV sy-vline      INTO ld_text SEPARATED BY SPACE.

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