exposed last optimized query for diagnostics
exposed last optimized query for diagnostics

git-svn-id: 70ea2e2438545e53c1a57116d9bc498ccdd9cff9@1351 d2cdb213-60f8-4f1b-b4b2-f6b941818144

msokolov/lux,coyotesqrl/lux,msokolov/lux