[CALCITE-3643] Prevent matching JoinCommuteRule when both inputs are the same

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.22.0
• Component/s: core
• Assignee: Vladimir Sitnikov
• Reporter: Vladimir Sitnikov
• Created: 29/Dec/19 10:51
• Updated: 30/Dec/19 07:01
• Resolved: 29/Dec/19 10:54

Description

The conditions like =($0, $1) and =($1, $1) are equivalent, however adding that permutation increases search space and it gains nothing.