spark_remove_table_if_exists accepts sc, not DBI conn
spark_remove_table_if_exists accepts sc, not DBI conn

rstudio/sparklyr,kevinykuo/sparklyr,rstudio/sparklyr,kevinykuo/sparklyr,kevinykuo/sparklyr,kevinykuo/sparklyr,rstudio/sparklyr,rstudio/sparklyr