RE: Query of 100 mil rows with multiple parameters

SSC Guru

Points: 186127

March 3, 2014 at 1:57 am

A significant number of implicit conversions are interfering with optimisation of this query. Here's a few recommendations to start with:

Cast @YearFrom and @YearTo to same datatype as BRFCLSeaWeekHis.Year

Cast @QuoteType to same datatype as BRFCLSeaWeekHis.QuoteType

Temp table #TradeLanes: cast PortFrom and PortTo to same datatype as BRFCLSeaWeekHis.PortFrom and BRFCLSeaWeekHis.PortTo

Temp table #Incoterms: cast Code to same datatype as BRFCLSeaWeekHis.IncotermCode

Get these done, run the query again and post the execution plan.

^{“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw}

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