[SPARK-14910] Native DDL Command Support for Describe Function in Non-identifier Format

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Resolved
• Affects Version/s: 2.0.0
• Component/s: SQL
• Target Version/s: 2.0.0
• Assignee: Xiao Li
• Reporter: Xiao Li
• Created: 26/Apr/16 01:58
• Updated: 26/Apr/16 17:30
• Resolved: 26/Apr/16 17:30

Description

The existing `Describe Function` only support the function name in `identifier`. This is different from what Hive behaves. That is why many test cases `udf_abc` in `HiveCompatibilitySuite` do not pass. For example,

• udf_not.q
• udf_bitwise_not.q

We need to support the command of `Describe Function` whose function names are in the following formats that are not natively supported:

• `STRING` (e.g., `'func1'`)
• `comparisonOperator` (e.g,. `<`)
• `arithmeticOperator` (e.g., `+`)
• `predicateOperator` (e.g., `or`)

Issue Links

• blocks: SPARK-14802 Disable Passing to Hive the queries that can't be parsed
• links to: [Github] Pull Request #12679 (gatorsmile)