Jinfeng Ni created DRILL-1355:
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Summary: Drill may miss using storage engine specific rules in
optimizer.
Key: DRILL-1355
URL: https://issues.apache.org/jira/browse/DRILL-1355
Project: Apache Drill
Issue Type: Bug
Reporter: Jinfeng Ni
Assignee: Jinfeng Ni
Currently, Drill implementation uses a static variable for the rulesets used by
optimizer. Once the rule set variable is initialized, it will not be updated,
even if there is new storage plugin added or registered.
This will cause problems:
1) In HBase unit test, if there is no hbase storage plugin configured when run
the unit test, the Hbase test suit will add a new HBase plugin on-the-fly.
However, the optimizer's ruleset has been initialized. This will essentially
disable the hbase specific rule (currently the HBasePushFilterIntoScanRule).
2) If user starts a Drillbit, runs some queries, then adds a new storage
plugin, the rules specific for this new plugin will not be added to optimizer,
since the optimizer's ruleset has already been initialized. That means query
refers to the new plug may not have those rules executed. This may lead to less
efficient query execution plan.
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