ABAP Select data from SAP table PAYREQN_REQNITMD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PAYREQN_REQNITMD 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 PAYREQN_REQNITMD. 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 PAYREQN_REQNITMD 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_PAYREQN_REQNITMD TYPE STANDARD TABLE OF PAYREQN_REQNITMD,
      WA_PAYREQN_REQNITMD TYPE PAYREQN_REQNITMD,
      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: <PAYREQN_REQNITMD> TYPE PAYREQN_REQNITMD.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PAYREQN_REQNITMD
*  INTO TABLE @DATA(IT_PAYREQN_REQNITMD2).
*--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_PAYREQN_REQNITMD INDEX 1 INTO DATA(WA_PAYREQN_REQNITMD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PAYREQN_REQNITMD>-MANDT = 1.
<PAYREQN_REQNITMD>-PAYMENTREQUISITIONITEMUUID = 1.
<PAYREQN_REQNITMD>-PAYMENTREQUISITIONUUID = 1.
<PAYREQN_REQNITMD>-COMPANYCODE = 1.
<PAYREQN_REQNITMD>-COUNTRY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PAYREQN_REQNITMD-FISCALYEAR, sy-vline,
  WA_PAYREQN_REQNITMD-ACCOUNTINGDOCUMENT, sy-vline,
  WA_PAYREQN_REQNITMD-ACCOUNTINGDOCUMENTITEM, sy-vline,
  WA_PAYREQN_REQNITMD-ACCOUNTINGDOCUMENTTYPE, sy-vline,
  WA_PAYREQN_REQNITMD-AMOUNTINTRANSACTIONCURRENCY, sy-vline,
  WA_PAYREQN_REQNITMD-REMAININGOPENAMTINDSPCRCY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PAYREQN_REQNITMD 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_PAYREQN_REQNITMD 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_PAYREQN_REQNITMD INTO WA_PAYREQN_REQNITMD.


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

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

*Conversion exit ALPHA, internal->external for field SUPPLIER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PAYREQN_REQNITMD-SUPPLIER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PAYREQN_REQNITMD-SUPPLIER.
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_PAYREQN_REQNITMD_STR, 
MANDT TYPE STRING,
PAYMENTREQUISITIONITEMUUID TYPE STRING,
PAYMENTREQUISITIONUUID TYPE STRING,
COMPANYCODE TYPE STRING,
COUNTRY TYPE STRING,
FISCALYEAR TYPE STRING,
ACCOUNTINGDOCUMENT TYPE STRING,
ACCOUNTINGDOCUMENTITEM TYPE STRING,
ACCOUNTINGDOCUMENTTYPE TYPE STRING,
AMOUNTINTRANSACTIONCURRENCY TYPE STRING,
REMAININGOPENAMTINDSPCRCY TYPE STRING,
PAYTREQEDITABLEAMTINTRANSCRCY TYPE STRING,
PAYMENTREQUESTAMOUNTINPAYTCRCY TYPE STRING,
PAYTREQNAMTINTRANSCRCYFOREDIT TYPE STRING,
CURRENCY TYPE STRING,
NETDUEDATE TYPE STRING,
PAYMENTMETHOD TYPE STRING,
ITEMTYPE TYPE STRING,
SUPPLIER TYPE STRING,
DRAFTENTITYCREATIONDATETIME TYPE STRING,
DRAFTENTITYLASTCHANGEDATETIME TYPE STRING,
DRAFTADMINISTRATIVEDATAUUID TYPE STRING,
DRAFTENTITYOPERATIONCODE TYPE STRING,
HASACTIVEENTITY TYPE STRING,
DRAFTFIELDCHANGES TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PAYREQN_REQNITMD_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_PAYREQN_REQNITMD_STR-MANDT sy-vline 
WA_PAYREQN_REQNITMD_STR-PAYMENTREQUISITIONITEMUUID sy-vline 
WA_PAYREQN_REQNITMD_STR-PAYMENTREQUISITIONUUID sy-vline 
WA_PAYREQN_REQNITMD_STR-COMPANYCODE sy-vline 
WA_PAYREQN_REQNITMD_STR-COUNTRY sy-vline 
WA_PAYREQN_REQNITMD_STR-FISCALYEAR sy-vline 
WA_PAYREQN_REQNITMD_STR-ACCOUNTINGDOCUMENT sy-vline 
WA_PAYREQN_REQNITMD_STR-ACCOUNTINGDOCUMENTITEM sy-vline 
WA_PAYREQN_REQNITMD_STR-ACCOUNTINGDOCUMENTTYPE sy-vline 
WA_PAYREQN_REQNITMD_STR-AMOUNTINTRANSACTIONCURRENCY sy-vline 
WA_PAYREQN_REQNITMD_STR-REMAININGOPENAMTINDSPCRCY sy-vline 
WA_PAYREQN_REQNITMD_STR-PAYTREQEDITABLEAMTINTRANSCRCY sy-vline 
WA_PAYREQN_REQNITMD_STR-PAYMENTREQUESTAMOUNTINPAYTCRCY sy-vline 
WA_PAYREQN_REQNITMD_STR-PAYTREQNAMTINTRANSCRCYFOREDIT sy-vline 
WA_PAYREQN_REQNITMD_STR-CURRENCY sy-vline 
WA_PAYREQN_REQNITMD_STR-NETDUEDATE sy-vline 
WA_PAYREQN_REQNITMD_STR-PAYMENTMETHOD sy-vline 
WA_PAYREQN_REQNITMD_STR-ITEMTYPE sy-vline 
WA_PAYREQN_REQNITMD_STR-SUPPLIER sy-vline 
WA_PAYREQN_REQNITMD_STR-DRAFTENTITYCREATIONDATETIME sy-vline 
WA_PAYREQN_REQNITMD_STR-DRAFTENTITYLASTCHANGEDATETIME sy-vline 
WA_PAYREQN_REQNITMD_STR-DRAFTADMINISTRATIVEDATAUUID sy-vline 
WA_PAYREQN_REQNITMD_STR-DRAFTENTITYOPERATIONCODE sy-vline 
WA_PAYREQN_REQNITMD_STR-HASACTIVEENTITY sy-vline 
WA_PAYREQN_REQNITMD_STR-DRAFTFIELDCHANGES sy-vline      INTO ld_text SEPARATED BY SPACE.

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