[jira] [Created] (CALCITE-5109) RelMdAllPredicates support to analyze left-out-join

["Xurenhe (Jira)" <ji...@apache.org>]

Xurenhe created CALCITE-5109:
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             Summary: RelMdAllPredicates support to analyze left-out-join
                 Key: CALCITE-5109
                 URL: https://issues.apache.org/jira/browse/CALCITE-5109
             Project: Calcite
          Issue Type: Wish
          Components: core
            Reporter: Xurenhe


 
{code:java}
select * from
 left_sub_query {left_where_condition}
join {join_type}
 right_sub_query {right_where_condition}
on {on_condition}
where {where_condition}{code}
 

As we know:
 * join_type is {*}left out join{*}:
 ** *left_where_condition* could be pulled to *where_condition*
 ** *right_where_condition* could be pulled to *on_condition*
 * join_type is *right out join:* 
 ** *left_where_condition* could be pulled to *on_condition*
 ** *right_where_condition* could be pulled to *where_condition*

----
There are a large number of star-model in the warehouse. Rewriting query by materialized view is a very effective way to speed up query.
 
I'm expanding [{*}MaterializedViewRule#perform{*}|[https://github.com/apache/calcite/blob/bc23290fe67725282b8e2294723c8a9368f05486/core/src/main/java/org/apache/calcite/rel/rules/materialize/MaterializedViewRule.java#L175]]to support rewriting query when meeting left-out-join, and [{*}RelMdAllPredicates{*}|[https://github.com/apache/calcite/blob/bc23290fe67725282b8e2294723c8a9368f05486/core/src/main/java/org/apache/calcite/rel/metadata/RelMdAllPredicates.java#L193]] didn't support to analyze left-join now.
Could calcite support it? This feature is very important for expanding *MaterializedViewRule#perform*
 



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