[CALCITE-1524] Add a project to the planner root so that rules know which output fields are used

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.11.0
• Assignee: Julian Hyde
• Reporter: Julian Hyde
• Created: 02/Dec/16 02:05
• Updated: 06/Jan/17 19:29
• Resolved: 02/Dec/16 18:19

Description

Add a project to the planner root so that rules know which output fields are used.

One such rule is SemiJoinRule; it can only apply if it knows that no fields are used from the right-hand input, so it has to match a Project at the root of its pattern.