ABAP Select data from SAP table PAYREQN_S_REQN_HISTORY into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PAYREQN_S_REQN_HISTORY 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_S_REQN_HISTORY. 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_S_REQN_HISTORY 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_S_REQN_HISTORY TYPE STANDARD TABLE OF PAYREQN_S_REQN_HISTORY,
      WA_PAYREQN_S_REQN_HISTORY TYPE PAYREQN_S_REQN_HISTORY,
      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_S_REQN_HISTORY> TYPE PAYREQN_S_REQN_HISTORY.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PAYREQN_S_REQN_HISTORY
*  INTO TABLE @DATA(IT_PAYREQN_S_REQN_HISTORY2).
*--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_S_REQN_HISTORY INDEX 1 INTO DATA(WA_PAYREQN_S_REQN_HISTORY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PAYREQN_S_REQN_HISTORY>-PAYMENTREQUISITIONHISTORYUUID = 1.
<PAYREQN_S_REQN_HISTORY>-PAYMENTREQUISITIONUUID = 1.
<PAYREQN_S_REQN_HISTORY>-PAYMENTREQUISITIONSTRATEGYUUID = 1.
<PAYREQN_S_REQN_HISTORY>-PAYMENTREQNPAYMENTITEMUUID = 1.
<PAYREQN_S_REQN_HISTORY>-PAYMENTREQUISITIONACTION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PAYREQN_S_REQN_HISTORY-SYSTEMMESSAGETYPE, sy-vline,
  WA_PAYREQN_S_REQN_HISTORY-SYSTEMMESSAGECLASS, sy-vline,
  WA_PAYREQN_S_REQN_HISTORY-SYSTEMMESSAGENUMBER, sy-vline,
  WA_PAYREQN_S_REQN_HISTORY-SYSTEMMESSAGEVARIABLE1, sy-vline,
  WA_PAYREQN_S_REQN_HISTORY-SYSTEMMESSAGEVARIABLE2, sy-vline,
  WA_PAYREQN_S_REQN_HISTORY-SYSTEMMESSAGEVARIABLE3, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PAYREQN_S_REQN_HISTORY 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_S_REQN_HISTORY 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_S_REQN_HISTORY INTO WA_PAYREQN_S_REQN_HISTORY.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_PAYREQN_S_REQN_HISTORY_STR, 
PAYMENTREQUISITIONHISTORYUUID TYPE STRING,
PAYMENTREQUISITIONUUID TYPE STRING,
PAYMENTREQUISITIONSTRATEGYUUID TYPE STRING,
PAYMENTREQNPAYMENTITEMUUID TYPE STRING,
PAYMENTREQUISITIONACTION TYPE STRING,
SYSTEMMESSAGETYPE TYPE STRING,
SYSTEMMESSAGECLASS TYPE STRING,
SYSTEMMESSAGENUMBER TYPE STRING,
SYSTEMMESSAGEVARIABLE1 TYPE STRING,
SYSTEMMESSAGEVARIABLE2 TYPE STRING,
SYSTEMMESSAGEVARIABLE3 TYPE STRING,
SYSTEMMESSAGEVARIABLE4 TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATETIME TYPE STRING,
CHANGEDONDATETIME TYPE STRING,
HISTORYDATETIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PAYREQN_S_REQN_HISTORY_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_S_REQN_HISTORY_STR-PAYMENTREQUISITIONHISTORYUUID sy-vline 
WA_PAYREQN_S_REQN_HISTORY_STR-PAYMENTREQUISITIONUUID sy-vline 
WA_PAYREQN_S_REQN_HISTORY_STR-PAYMENTREQUISITIONSTRATEGYUUID sy-vline 
WA_PAYREQN_S_REQN_HISTORY_STR-PAYMENTREQNPAYMENTITEMUUID sy-vline 
WA_PAYREQN_S_REQN_HISTORY_STR-PAYMENTREQUISITIONACTION sy-vline 
WA_PAYREQN_S_REQN_HISTORY_STR-SYSTEMMESSAGETYPE sy-vline 
WA_PAYREQN_S_REQN_HISTORY_STR-SYSTEMMESSAGECLASS sy-vline 
WA_PAYREQN_S_REQN_HISTORY_STR-SYSTEMMESSAGENUMBER sy-vline 
WA_PAYREQN_S_REQN_HISTORY_STR-SYSTEMMESSAGEVARIABLE1 sy-vline 
WA_PAYREQN_S_REQN_HISTORY_STR-SYSTEMMESSAGEVARIABLE2 sy-vline 
WA_PAYREQN_S_REQN_HISTORY_STR-SYSTEMMESSAGEVARIABLE3 sy-vline 
WA_PAYREQN_S_REQN_HISTORY_STR-SYSTEMMESSAGEVARIABLE4 sy-vline 
WA_PAYREQN_S_REQN_HISTORY_STR-CREATEDBYUSER sy-vline 
WA_PAYREQN_S_REQN_HISTORY_STR-CREATIONDATETIME sy-vline 
WA_PAYREQN_S_REQN_HISTORY_STR-CHANGEDONDATETIME sy-vline 
WA_PAYREQN_S_REQN_HISTORY_STR-HISTORYDATETIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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