[teiid-issues] [JBoss JIRA] (TEIID-5751) Please add optimization support for foreign keys in materialized tables
Christoph John (Jira)
issues at jboss.org
Sun May 26 09:39:00 EDT 2019
Christoph John created TEIID-5751:
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Summary: Please add optimization support for foreign keys in materialized tables
Key: TEIID-5751
URL: https://issues.jboss.org/browse/TEIID-5751
Project: Teiid
Issue Type: Enhancement
Components: Query Engine
Affects Versions: 12.2
Reporter: Christoph John
Assignee: Steven Hawkins
The issues came up in the following discussion
https://developer.jboss.org/message/989502#989502
> 1a) Are the constraints (indexes, foreign keys) now used to optimize queries in materialized tables or not?
Pk, Unique Key, and Indexes on the view will result in the creation of an index on the materialization target table and are fully utilized in planning decisions. Things are a little more complicated with foreign keys. {color:red}Currently they are not propagated onto the generated materialization target table metadata, so they are only considered in pre-planner activities, such as rewrite, before the view reference is replaced with the materialization target - but there aren't meaningful optimizations being made at that time based upon foreign key. There are couple of narrow situations where that information would be useful{color}, so it probably should be added.
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