[
https://issues.apache.org/jira/browse/CALCITE-1182?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15223441#comment-15223441
]
Julian Hyde commented on CALCITE-1182:
--------------------------------------
Makes sense. A unit test would make it clearer.
> Add ProjectRemoveRule to pre-processing program of materialization
> substitution
> -------------------------------------------------------------------------------
>
> Key: CALCITE-1182
> URL: https://issues.apache.org/jira/browse/CALCITE-1182
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: Maryann Xue
> Assignee: Maryann Xue
> Priority: Minor
> Labels: materializedviews, phoenix
>
> In VolcanoPlanner, we apply a simple pre-processing hep program to normalize
> the "target" and "query" rels before materialization substitution. Currently
> this program runs with two rules: FilterProjectTransposeRule and
> ProjectMergeRule.
> We need an extra rule ProjectRemoveRule for the Phoenix use case where a
> secondary index (modeled as materialized views) is defined on a view so the
> materialized view "queryRel" may have an identity projection introduced by
> this view.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
