Re: SparkSQL: What is the cost of DataFrame.registerTempTable(String)? Can I have multiple tables referencing to the same DataFrame?

Its super cheap. Its just a hashtable stored on the driver. Yes you can have more than one name for the same DF. On Wed, Oct 28, 2015 at 6:17 PM, Anfernee Xu wrote: > Hi, > > I just want to understand the cost of DataFrame.registerTempTable(String), > is it just a

SparkSQL: What is the cost of DataFrame.registerTempTable(String)? Can I have multiple tables referencing to the same DataFrame?

Hi, I just want to understand the cost of DataFrame.registerTempTable(String), is it just a trivial operation(like creating a object reference) in master(Driver) JVM? And Can I have multiple tables with different name referencing to the same DataFrame? Thanks -- --Anfernee