ABAP Select data from SAP table /ATL/WT_PAYMENTS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /ATL/WT_PAYMENTS 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 /ATL/WT_PAYMENTS. 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 /ATL/WT_PAYMENTS 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_/ATL/WT_PAYMENTS TYPE STANDARD TABLE OF /ATL/WT_PAYMENTS,
      WA_/ATL/WT_PAYMENTS TYPE /ATL/WT_PAYMENTS,
      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: </ATL/WT_PAYMENTS> TYPE /ATL/WT_PAYMENTS.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /ATL/WT_PAYMENTS
  INTO TABLE IT_/ATL/WT_PAYMENTS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /ATL/WT_PAYMENTS
*  INTO TABLE @DATA(IT_/ATL/WT_PAYMENTS2).
*--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_/ATL/WT_PAYMENTS INDEX 1 INTO DATA(WA_/ATL/WT_PAYMENTS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/ATL/WT_PAYMENTS ASSIGNING </ATL/WT_PAYMENTS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</ATL/WT_PAYMENTS>-SUG = 1.
</ATL/WT_PAYMENTS>-STCEG = 1.
</ATL/WT_PAYMENTS>-LIFNR = 1.
</ATL/WT_PAYMENTS>-NAME1 = 1.
</ATL/WT_PAYMENTS>-STRAS = 1.

ENDLOOP.

LOOP AT IT_/ATL/WT_PAYMENTS INTO WA_/ATL/WT_PAYMENTS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/ATL/WT_PAYMENTS-ORT01, sy-vline,
  WA_/ATL/WT_PAYMENTS-BLDAT, sy-vline,
  WA_/ATL/WT_PAYMENTS-BELNR, sy-vline,
  WA_/ATL/WT_PAYMENTS-BUKRS, sy-vline,
  WA_/ATL/WT_PAYMENTS-GJAHR, sy-vline,
  WA_/ATL/WT_PAYMENTS-BUZEI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/ATL/WT_PAYMENTS 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_/ATL/WT_PAYMENTS 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_/ATL/WT_PAYMENTS INTO WA_/ATL/WT_PAYMENTS.


*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 LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/ATL/WT_PAYMENTS-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ATL/WT_PAYMENTS-LIFNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit AU132, internal->external for field DMBTR#
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_/ATL/WT_PAYMENTS-DMBTR#
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ATL/WT_PAYMENTS-DMBTR#.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field MWSTS#
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_/ATL/WT_PAYMENTS-MWSTS#
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ATL/WT_PAYMENTS-MWSTS#.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field QBSHB#
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_/ATL/WT_PAYMENTS-QBSHB#
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ATL/WT_PAYMENTS-QBSHB#.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field BALANCE
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_/ATL/WT_PAYMENTS-BALANCE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ATL/WT_PAYMENTS-BALANCE.
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_/ATL/WT_PAYMENTS_STR, 
SUG TYPE STRING,
STCEG TYPE STRING,
LIFNR TYPE STRING,
NAME1 TYPE STRING,
STRAS TYPE STRING,
ORT01 TYPE STRING,
BLDAT TYPE STRING,
BELNR TYPE STRING,
BUKRS TYPE STRING,
GJAHR TYPE STRING,
BUZEI TYPE STRING,
BRSCH TYPE STRING,
QLAND TYPE STRING,
HECHZER_MAS TYPE STRING,
BUSAB TYPE STRING,
QSSKZ1 TYPE STRING,
DMBTR# TYPE STRING,
MWSTS# TYPE STRING,
QBSHB# TYPE STRING,
BALANCE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/ATL/WT_PAYMENTS_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_/ATL/WT_PAYMENTS_STR-SUG sy-vline 
WA_/ATL/WT_PAYMENTS_STR-STCEG sy-vline 
WA_/ATL/WT_PAYMENTS_STR-LIFNR sy-vline 
WA_/ATL/WT_PAYMENTS_STR-NAME1 sy-vline 
WA_/ATL/WT_PAYMENTS_STR-STRAS sy-vline 
WA_/ATL/WT_PAYMENTS_STR-ORT01 sy-vline 
WA_/ATL/WT_PAYMENTS_STR-BLDAT sy-vline 
WA_/ATL/WT_PAYMENTS_STR-BELNR sy-vline 
WA_/ATL/WT_PAYMENTS_STR-BUKRS sy-vline 
WA_/ATL/WT_PAYMENTS_STR-GJAHR sy-vline 
WA_/ATL/WT_PAYMENTS_STR-BUZEI sy-vline 
WA_/ATL/WT_PAYMENTS_STR-BRSCH sy-vline 
WA_/ATL/WT_PAYMENTS_STR-QLAND sy-vline 
WA_/ATL/WT_PAYMENTS_STR-HECHZER_MAS sy-vline 
WA_/ATL/WT_PAYMENTS_STR-BUSAB sy-vline 
WA_/ATL/WT_PAYMENTS_STR-QSSKZ1 sy-vline 
WA_/ATL/WT_PAYMENTS_STR-DMBTR# sy-vline 
WA_/ATL/WT_PAYMENTS_STR-MWSTS# sy-vline 
WA_/ATL/WT_PAYMENTS_STR-QBSHB# sy-vline 
WA_/ATL/WT_PAYMENTS_STR-BALANCE sy-vline      INTO ld_text SEPARATED BY SPACE.

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