Support Spark & Presto Sql

[melin]

Spark Antlr4 Files:
https://github.com/apache/spark/tree/master/sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser

Presto Antlr4 file:
https://github.com/prestodb/presto/blob/master/presto-parser/src/main/antlr4/com/facebook/presto/sql/parser/SqlBase.g4

[chengchengpei]

I am also interested in spark sql, presto sql too

@melin why there is only one g4 file for presto: https://github.com/prestodb/presto/blob/master/presto-parser/src/main/antlr4/com/facebook/presto/sql/parser/SqlBase.g4 ?

[melin]

Lexical and grammar combined in one file

[mtriff]

I would love to add Spark and Presto to this package, but I won't have time to do so over the next while. If you'd like to submit a pull request with the changes, that would be the fastest way to get this implemented. You can follow the docs on building and testing new grammars here.