add a couple more spark-sql functions
add a couple more spark-sql functions

kul/flambo,arzig/flambo,gorillalabs/sparkling,cswaroop/sparkling,cswaroop/sparkling,gorillalabs/sparkling,antonoal/sparkling,antonoal/sparkling,jbtv/sparkling,chrisbetz/sparkling,gorillalabs/sparkling,cswaroop/sparkling,chetmancini/flambo,cswaroop/sparkling,anujsrc/flambo,jbtv/sparkling,antonoal/sparkling,gorillalabs/sparkling,yieldbot/flambo,chrisbetz/sparkling,chrisbetz/sparkling,senor-hadoop/flambo,jbtv/sparkling,antonoal/sparkling,QAston/flambo,gorillalabs/sparkling,jbtv/sparkling,chrisbetz/sparkling