Shengsheng Huang created HIVE-3472:
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Summary: Build An Analytical SQL Engine for MapReduce
Key: HIVE-3472
URL: https://issues.apache.org/jira/browse/HIVE-3472
Project: Hive
Issue Type: New Feature
Affects Versions: 0.10.0
Reporter: Shengsheng Huang
While there are continuous efforts in extending Hive’s SQL support (e.g., see
some recent examples such as HIVE-2005 and HIVE-2810), many widely used SQL
constructs are still not supported in HiveQL, such as selecting from multiple
tables, subquery in WHERE clauses, etc.
We propose to build a SQL-92 full compatible engine (for MapReduce based
analytical query processing) as an extension to Hive.
The SQL frontend will co-exist with the HiveQL frontend; consequently, one can
mix SQL and HiveQL statements in their queries (switching between HiveQL mode
and SQL-92 mode using a “hive.ql.mode” parameter before each query statement).
This way useful Hive extensions are still accessible to users.
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