[CALCITE-3792] Remove the generic type declaration of method RelOptCluster#getMetadataQuery

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.22.0
• Fix Version/s: 1.22.0
• Component/s: core
• Labels: pull-request-available
• Assignee: Danny Chen
• Reporter: Danny Chen
• Created: 13/Feb/20 06:46
• Updated: 06/Mar/20 04:35
• Resolved: 14/Feb/20 01:12

Description

The type inference of Scala code 'val mq = cluster.getMetadataQuery' is failed during compile time, if we have that generic type declaration for the Java method.

Remove the type declaration makes the Scala code more user friendly and straight-forward.

Issue Links

• is related to: CALCITE-3446 Make RelMetadataQuery extensible
• links to: GitHub Pull Request #1802