Hi ,
I faced this issue earlier, but had a work round, which is not going to work provided I use to have the lookup results to be used in ifthenelse logic.
Below are the screenshots, of a test dataflow with output as below. The column BOOKING_DATE_KEY has a lookup_ext function which compares LDATE( In decimal(10,0) ) with FULL_DATE(datetime) of DIM_DATE Dimension.
The query lookup function looks like as below:
lookup_ext([SDDataMartDev.DBO.DIM_DATE,'PRE_LOAD_CACHE','MIN'], [DATE_KEY],[4466],[FULL_DATE,'=',TO_DATE(TO_CHAR(TRAPEZE_BOOKING.LDATE,'YYYYMMDD'),'YYYYMMDD')]) SET ("run_as_separate_process"='no', "output_cols_info"='<?xml version="1.0" encoding="UTF-8"?><output_cols_info><col index="1" expression="no"/>
</output_cols_info>' )
It give me the key of 20120118 in booking_date_key
Now when I try to have ifthenelse logic to populate this lookup value, it gives me the default value of lookup and not the value which we stored in BOOKING_DATE_KEY.
Any Idea how to use lookup value in ifthenelse in same query or subsequent query?