问题
Is it possible to make joins between two tables from two different Presto catalogs? Assume I have a product table in MySQL and another table sales_order in hive; can I join them? If yes, then how can I specify the catalog for MySQL and what would my query look like?
回答1:
EDIT: Since v0.76 Presto adds a MySQL connector and a PostgreSQL connector.
For now, prestodb is not capable to connect to a relational database like mysql. More info in presto FAQ:
Does Presto connect to MySQL / PostgreSQL / Oracle?
Not yet. We have a basic JDBC connector in development. Note that this is for connecting to an external JDBC database. Presto already includes a JDBC driver that allows Java applications to connect to Presto.
来源：https://stackoverflow.com/questions/21166694/how-to-connect-a-presto-database-to-mysql