[CALCITE-918] createProject in RelOptUtil should uniquify field names

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.4.0-incubating
• Fix Version/s: 1.5.0
• Assignee: Jesus Camacho Rodriguez
• Reporter: Jesus Camacho Rodriguez
• Created: 12/Oct/15 16:58
• Updated: 10/Nov/15 08:02
• Resolved: 13/Oct/15 09:29

Description

The method

 
public static RelNode createProject(
      final RelFactories.ProjectFactory factory,
      final RelNode child, final List<Integer> posList)

in RelOptUtil should uniquify fields before creating the Project operator. Otherwise, we might end up hitting an assertion in the Project constructor. This behavior was observed using the AggregateProjectMergeRule rule.

Issue Links

• links to: PR 147