Github user AndreSchumacher commented on the pull request:
https://github.com/apache/spark/pull/360#issuecomment-44777089
The changes to SqlParser should not have any function effects. I just had
to reshuffle a few things to make it easier to extend it to a parser that would
support the nested array/map-field expressions, see `NestedSqlParser` in
`ParquetQuerySuite`. Currently that parser is incompatible with Hive
expressions such as `insert into <database_name>.<table_name>` so we need to
revisit that once the syntax is fixed. It's currently there for the tests only.
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