ABAP Select data from SAP table RECP_AO_USAGE_REL_C into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RECP_AO_USAGE_REL_C
*  INTO TABLE @DATA(IT_RECP_AO_USAGE_REL_C2).
*--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_RECP_AO_USAGE_REL_C INDEX 1 INTO DATA(WA_RECP_AO_USAGE_REL_C2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RECP_AO_USAGE_REL_C>-MANDT = 1.
<RECP_AO_USAGE_REL_C>-INTRENOSRC = 1.
<RECP_AO_USAGE_REL_C>-INTRENOTRG = 1.
<RECP_AO_USAGE_REL_C>-VALIDTO = 1.
<RECP_AO_USAGE_REL_C>-VALIDFROM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RECP_AO_USAGE_REL_C-TYPESRC, sy-vline,
  WA_RECP_AO_USAGE_REL_C-TYPETRG, sy-vline,
  WA_RECP_AO_USAGE_REL_C-RELPROP, sy-vline,
  WA_RECP_AO_USAGE_REL_C-OBJNRSRC, sy-vline,
  WA_RECP_AO_USAGE_REL_C-OBJNRTRG, sy-vline,
  WA_RECP_AO_USAGE_REL_C-BUKRS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RECP_AO_USAGE_REL_C 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_RECP_AO_USAGE_REL_C 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_RECP_AO_USAGE_REL_C INTO WA_RECP_AO_USAGE_REL_C.


*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 REDAT, internal->external for field VALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_RECP_AO_USAGE_REL_C-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RECP_AO_USAGE_REL_C-VALIDTO.
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_RECP_AO_USAGE_REL_C_STR, 
MANDT TYPE STRING,
INTRENOSRC TYPE STRING,
INTRENOTRG TYPE STRING,
VALIDTO TYPE STRING,
VALIDFROM TYPE STRING,
TYPESRC TYPE STRING,
TYPETRG TYPE STRING,
RELPROP TYPE STRING,
OBJNRSRC TYPE STRING,
OBJNRTRG TYPE STRING,
BUKRS TYPE STRING,
XDATERANGE TYPE STRING,
XIDENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RECP_AO_USAGE_REL_C_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_RECP_AO_USAGE_REL_C_STR-MANDT sy-vline 
WA_RECP_AO_USAGE_REL_C_STR-INTRENOSRC sy-vline 
WA_RECP_AO_USAGE_REL_C_STR-INTRENOTRG sy-vline 
WA_RECP_AO_USAGE_REL_C_STR-VALIDTO sy-vline 
WA_RECP_AO_USAGE_REL_C_STR-VALIDFROM sy-vline 
WA_RECP_AO_USAGE_REL_C_STR-TYPESRC sy-vline 
WA_RECP_AO_USAGE_REL_C_STR-TYPETRG sy-vline 
WA_RECP_AO_USAGE_REL_C_STR-RELPROP sy-vline 
WA_RECP_AO_USAGE_REL_C_STR-OBJNRSRC sy-vline 
WA_RECP_AO_USAGE_REL_C_STR-OBJNRTRG sy-vline 
WA_RECP_AO_USAGE_REL_C_STR-BUKRS sy-vline 
WA_RECP_AO_USAGE_REL_C_STR-XDATERANGE sy-vline 
WA_RECP_AO_USAGE_REL_C_STR-XIDENT sy-vline      INTO ld_text SEPARATED BY SPACE.

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