improved the syntax of TGFs
improved the syntax of TGFs

alabid/blinkdb,sjyk/sampleclean,lzshlzsh/shark,alabid/blinkdb,amplab/shark,sjyk/sampleclean,sameeragarwal/blinkdb,mapr/shark,sameeragarwal/blinkdb,amplab/shark,mattyb149/blinkdb,amplab/shark,lzshlzsh/shark,lzshlzsh/shark,mattyb149/blinkdb,sameeragarwal/blinkdb,mapr/shark,mapr/shark,sjyk/sampleclean,mattyb149/blinkdb,alabid/blinkdb