[DRILL-3009] Reduce the IN list threshold to take advantage of Values operator

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.0.0
• Component/s: Query Planning & Optimization
• Assignee: Aman Sinha
• Reporter: Aman Sinha
• Created: 10/May/15 00:46
• Updated: 13/May/15 07:24
• Resolved: 13/May/15 07:24

Description

The IN-list threshold is currently set to 200 (it was bumped up from 20 previously since Drill did not have the Values operator). Now that Drill can support large IN lists through the Values operator, we should drop the threshold back and in fact lower it to 10.

For lists below this threshold, Calcite will build a binary tree of OR's. Above this threshold, it will create a ValuesRel .