ABAP Select data from SAP table VIYCRENT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VIYCRENT
*  INTO TABLE @DATA(IT_VIYCRENT2).
*--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_VIYCRENT INDEX 1 INTO DATA(WA_VIYCRENT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VIYCRENT>-MANDT = 1.
<VIYCRENT>-CAM_PERIOD_GUID = 1.
<VIYCRENT>-SETTL_GUID = 1.
<VIYCRENT>-CAM_RO_GUID = 1.
<VIYCRENT>-CAM_POOL_GUID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VIYCRENT-OCCCNOBJNR, sy-vline,
  WA_VIYCRENT-ROOBJNR, sy-vline,
  WA_VIYCRENT-PTO, sy-vline,
  WA_VIYCRENT-PFROM, sy-vline,
  WA_VIYCRENT-MTOCCUPATION, sy-vline,
  WA_VIYCRENT-CHECKREDDENOM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VIYCRENT 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_VIYCRENT 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_VIYCRENT INTO WA_VIYCRENT.


*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 PTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_VIYCRENT-PTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIYCRENT-PTO.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit REDAT, internal->external for field VALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_VIYCRENT-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIYCRENT-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_VIYCRENT_STR, 
MANDT TYPE STRING,
CAM_PERIOD_GUID TYPE STRING,
SETTL_GUID TYPE STRING,
CAM_RO_GUID TYPE STRING,
CAM_POOL_GUID TYPE STRING,
OCCCNOBJNR TYPE STRING,
ROOBJNR TYPE STRING,
PTO TYPE STRING,
PFROM TYPE STRING,
MTOCCUPATION TYPE STRING,
CHECKREDDENOM TYPE STRING,
PARTNER TYPE STRING,
VALIDFROM TYPE STRING,
VALIDTO TYPE STRING,
POSSDATEFROM TYPE STRING,
POSSDATETO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VIYCRENT_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_VIYCRENT_STR-MANDT sy-vline 
WA_VIYCRENT_STR-CAM_PERIOD_GUID sy-vline 
WA_VIYCRENT_STR-SETTL_GUID sy-vline 
WA_VIYCRENT_STR-CAM_RO_GUID sy-vline 
WA_VIYCRENT_STR-CAM_POOL_GUID sy-vline 
WA_VIYCRENT_STR-OCCCNOBJNR sy-vline 
WA_VIYCRENT_STR-ROOBJNR sy-vline 
WA_VIYCRENT_STR-PTO sy-vline 
WA_VIYCRENT_STR-PFROM sy-vline 
WA_VIYCRENT_STR-MTOCCUPATION sy-vline 
WA_VIYCRENT_STR-CHECKREDDENOM sy-vline 
WA_VIYCRENT_STR-PARTNER sy-vline 
WA_VIYCRENT_STR-VALIDFROM sy-vline 
WA_VIYCRENT_STR-VALIDTO sy-vline 
WA_VIYCRENT_STR-POSSDATEFROM sy-vline 
WA_VIYCRENT_STR-POSSDATETO sy-vline      INTO ld_text SEPARATED BY SPACE.

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