[CALCITE-787] Star table wrongly assigned to materialized view

• Type: Task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.4.0-incubating, 1.3.0-incubating
• Fix Version/s: 1.4.0-incubating
• Component/s: core
• Assignee: Julian Hyde
• Reporter: Amogh Margoor
• Created: 06/Jul/15 06:01
• Updated: 01/Sep/15 03:02
• Resolved: 17/Jul/15 00:12

Description

cc: vrajat

CalciteMaterializer tries to rewrite query relnode with the star table in schema (the first one that fits). Utility function used is RelOptMaterialization::tryUseStar. Utility function should return null when it cannot rewrite relnode using star table, but instead it is returning the same relnode back. This is causing MV being assigned star table even when it is not required.