ABAP Select data from SAP table TXW_ANLB into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TXW_ANLB 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_ANLB. 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_ANLB 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_ANLB TYPE STANDARD TABLE OF TXW_ANLB,
      WA_TXW_ANLB TYPE TXW_ANLB,
      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_ANLB> TYPE TXW_ANLB.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TXW_ANLB
*  INTO TABLE @DATA(IT_TXW_ANLB2).
*--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_ANLB INDEX 1 INTO DATA(WA_TXW_ANLB2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TXW_ANLB-BDATU, sy-vline,
  WA_TXW_ANLB-ADATU, sy-vline,
  WA_TXW_ANLB-AFABG, sy-vline,
  WA_TXW_ANLB-AFASL, sy-vline,
  WA_TXW_ANLB-ANLGR, sy-vline,
  WA_TXW_ANLB-ANLGR2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TXW_ANLB 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_ANLB 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_ANLB INTO WA_TXW_ANLB.


*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_ANLB-ANLN1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_ANLB-ANLN1.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field ANLGR2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_ANLB-ANLGR2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_ANLB-ANLGR2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field UMJAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_TXW_ANLB-UMJAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_ANLB-UMJAR.
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_ANLB_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
ANLN1 TYPE STRING,
ANLN2 TYPE STRING,
AFABE TYPE STRING,
BDATU TYPE STRING,
ADATU TYPE STRING,
AFABG TYPE STRING,
AFASL TYPE STRING,
ANLGR TYPE STRING,
ANLGR2 TYPE STRING,
NAPRZ TYPE STRING,
NDJAR TYPE STRING,
NDPER TYPE STRING,
NDURJ TYPE STRING,
NDURP TYPE STRING,
SAPRZ TYPE STRING,
SCHRW TYPE STRING,
UMJAR TYPE STRING,
XAFBE TYPE STRING,
ZINBG TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
INVSL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TXW_ANLB_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_ANLB_STR-MANDT sy-vline 
WA_TXW_ANLB_STR-BUKRS sy-vline 
WA_TXW_ANLB_STR-ANLN1 sy-vline 
WA_TXW_ANLB_STR-ANLN2 sy-vline 
WA_TXW_ANLB_STR-AFABE sy-vline 
WA_TXW_ANLB_STR-BDATU sy-vline 
WA_TXW_ANLB_STR-ADATU sy-vline 
WA_TXW_ANLB_STR-AFABG sy-vline 
WA_TXW_ANLB_STR-AFASL sy-vline 
WA_TXW_ANLB_STR-ANLGR sy-vline 
WA_TXW_ANLB_STR-ANLGR2 sy-vline 
WA_TXW_ANLB_STR-NAPRZ sy-vline 
WA_TXW_ANLB_STR-NDJAR sy-vline 
WA_TXW_ANLB_STR-NDPER sy-vline 
WA_TXW_ANLB_STR-NDURJ sy-vline 
WA_TXW_ANLB_STR-NDURP sy-vline 
WA_TXW_ANLB_STR-SAPRZ sy-vline 
WA_TXW_ANLB_STR-SCHRW sy-vline 
WA_TXW_ANLB_STR-UMJAR sy-vline 
WA_TXW_ANLB_STR-XAFBE sy-vline 
WA_TXW_ANLB_STR-ZINBG sy-vline 
WA_TXW_ANLB_STR-ERNAM sy-vline 
WA_TXW_ANLB_STR-ERDAT sy-vline 
WA_TXW_ANLB_STR-INVSL sy-vline      INTO ld_text SEPARATED BY SPACE.

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