ABAP Select data from SAP table RPCP01Q0_ALLOWANCE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RPCP01Q0_ALLOWANCE 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 RPCP01Q0_ALLOWANCE. 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 RPCP01Q0_ALLOWANCE 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_RPCP01Q0_ALLOWANCE TYPE STANDARD TABLE OF RPCP01Q0_ALLOWANCE,
      WA_RPCP01Q0_ALLOWANCE TYPE RPCP01Q0_ALLOWANCE,
      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: <RPCP01Q0_ALLOWANCE> TYPE RPCP01Q0_ALLOWANCE.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RPCP01Q0_ALLOWANCE.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RPCP01Q0_ALLOWANCE
  INTO TABLE IT_RPCP01Q0_ALLOWANCE.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RPCP01Q0_ALLOWANCE
*  INTO TABLE @DATA(IT_RPCP01Q0_ALLOWANCE2).
*--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_RPCP01Q0_ALLOWANCE INDEX 1 INTO DATA(WA_RPCP01Q0_ALLOWANCE2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RPCP01Q0_ALLOWANCE ASSIGNING <RPCP01Q0_ALLOWANCE>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RPCP01Q0_ALLOWANCE>-BUKRS = 1.
<RPCP01Q0_ALLOWANCE>-ABKRS = 1.
<RPCP01Q0_ALLOWANCE>-PERNR = 1.
<RPCP01Q0_ALLOWANCE>-ABNUM = 1.
<RPCP01Q0_ALLOWANCE>-BRNUM = 1.

ENDLOOP.

LOOP AT IT_RPCP01Q0_ALLOWANCE INTO WA_RPCP01Q0_ALLOWANCE.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RPCP01Q0_ALLOWANCE-BEGDT, sy-vline,
  WA_RPCP01Q0_ALLOWANCE-ENDDA, sy-vline,
  WA_RPCP01Q0_ALLOWANCE-CNAME, sy-vline,
  WA_RPCP01Q0_ALLOWANCE-LGART, sy-vline,
  WA_RPCP01Q0_ALLOWANCE-LGTXT, sy-vline,
  WA_RPCP01Q0_ALLOWANCE-BETRG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RPCP01Q0_ALLOWANCE 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_RPCP01Q0_ALLOWANCE 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_RPCP01Q0_ALLOWANCE INTO WA_RPCP01Q0_ALLOWANCE.


*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_RPCP01Q0_ALLOWANCE_STR, 
BUKRS TYPE STRING,
ABKRS TYPE STRING,
PERNR TYPE STRING,
ABNUM TYPE STRING,
BRNUM TYPE STRING,
BEGDT TYPE STRING,
ENDDA TYPE STRING,
CNAME TYPE STRING,
LGART TYPE STRING,
LGTXT TYPE STRING,
BETRG TYPE STRING,
ATYPE TYPE STRING,
TYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RPCP01Q0_ALLOWANCE_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_RPCP01Q0_ALLOWANCE_STR-BUKRS sy-vline 
WA_RPCP01Q0_ALLOWANCE_STR-ABKRS sy-vline 
WA_RPCP01Q0_ALLOWANCE_STR-PERNR sy-vline 
WA_RPCP01Q0_ALLOWANCE_STR-ABNUM sy-vline 
WA_RPCP01Q0_ALLOWANCE_STR-BRNUM sy-vline 
WA_RPCP01Q0_ALLOWANCE_STR-BEGDT sy-vline 
WA_RPCP01Q0_ALLOWANCE_STR-ENDDA sy-vline 
WA_RPCP01Q0_ALLOWANCE_STR-CNAME sy-vline 
WA_RPCP01Q0_ALLOWANCE_STR-LGART sy-vline 
WA_RPCP01Q0_ALLOWANCE_STR-LGTXT sy-vline 
WA_RPCP01Q0_ALLOWANCE_STR-BETRG sy-vline 
WA_RPCP01Q0_ALLOWANCE_STR-ATYPE sy-vline 
WA_RPCP01Q0_ALLOWANCE_STR-TYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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