[DRILL-698] Register scan-specific optimization rules using register() in RelNode interface.

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Fix Version/s: Future
• Component/s: Query Planning & Optimization
• Assignee: Unassigned
• Reporter: Jinfeng Ni
• Created: 12/May/14 16:04
• Updated: 01/Oct/15 16:37

Description

Currently, drill will get all the storage-engine-specific rules in StoragePluginRegistry, and register all the rules (HBase, Hive, etc) with the optimizer planner. This means even the query only refers a Hive table, the optimizer may still have rule for other storage-engine.

In stead, we should register the storage-engine-specific rules using interface RelNode's register() method, when we know a scan is for one particular storage-engine. This will avoid the issue that optimizer has more than necessary rules in its rule queue.