[HIVE-10286] SARGs: Type Safety via PredicateLeaf.type

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.2.0, 1.3.0
• Fix Version/s: 1.3.0, 2.0.0
• Component/s: File Formats, Serializers/Deserializers
• Assignee: Prasanth Jayachandran
• Reporter: Gopal Vijayaraghavan
• Created: 09/Apr/15 21:56
• Updated: 05/Jun/15 21:50
• Resolved: 01/May/15 19:08

Description

The Sargs impl today converts the statsObj to the type of the predicate object before doing any comparisons.

To satisfy the PPD requirements, the conversion has to be coerced to the type specified in PredicateLeaf.type.

The type conversions in Hive are standard and have a fixed promotion order.

Therefore the PredicateLeaf has to do type changes which match the exact order of type coercions offered by the FilterOperator.

Issue Links

• breaks: HIVE-10819 SearchArgumentImpl for Timestamp is broken by HIVE-10286
• is required by: HIVE-10556 ORC PPD schema on read related changes
• supercedes: HIVE-10221 PPD: Support Integer literals for ORC
• links to: https://reviews.apache.org/r/33598/