[rplst8]

Isn't Redshift also based on PostgreSQL? Edit: it is: https://en.wikipedia.org/wiki/Amazon_Redshift and RDS supports many different RDBMS flavors: https://en.wikipedia.org/wiki/Amazon_Relational_Database_Ser...

[heneryville]

Redshift is based on PestgreSQL, but is vastly different. Redshift is a columnar store, and can't do things like create indexes. http://docs.aws.amazon.com/redshift/latest/dg/c_SQL_commands...