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https://issues.apache.org/jira/browse/CALCITE-3115?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16912928#comment-16912928
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Danny Chan commented on CALCITE-3115:
-------------------------------------
Reviewing now ..
> Cannot add JdbcRules which have different JdbcConvention to same
> VolcanoPlanner's RuleSet.
> ------------------------------------------------------------------------------------------
>
> Key: CALCITE-3115
> URL: https://issues.apache.org/jira/browse/CALCITE-3115
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.19.0
> Reporter: TANG Wen-hui
> Assignee: Igor Guzenko
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.21.0
>
> Time Spent: 2h 20m
> Remaining Estimate: 0h
>
> When we use Calcite via JDBC to run a sql which involves two difference jdbc
> schema:
> {code:java}
> select * from (select "a",max("b") as max_b, sum("c") as sum_c from
> "test"."temp" where "d" > 10 or "b" <> 'hello' group by "a", "e", "f" having
> "a" > 100 and max("b") < 20 limit 10) t union select "a", "b","c" from
> "test2"."temp2" group by "a","b","c"
> {code}
> the sql get a plan like that:
> {code:java}
> EnumerableUnion(all=[false])
> JdbcToEnumerableConverter
> JdbcProject(a=[$0], MAX_B=[$3], SUM_C=[$4])
> JdbcSort(fetch=[10])
> JdbcFilter(condition=[<(CAST($3):BIGINT, 20)])
> JdbcAggregate(group=[{0, 4, 5}], MAX_B=[MAX($1)], SUM_C=[SUM($2)])
> JdbcFilter(condition=[AND(OR(>($3, 10), <>($1, 'hello')), >($0,
> 100))])
> JdbcTableScan(table=[[test, temp]])
> EnumerableAggregate(group=[{0, 1, 2}])
> JdbcToEnumerableConverter
> JdbcTableScan(table=[[test2, temp2]])
> {code}
> And the EnumerableAggregate for table test2.temp2 cannot be converted to
> JdbcAggregate.
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