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https://issues.apache.org/jira/browse/IGNITE-1232?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15206656#comment-15206656
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Artem Shutak commented on IGNITE-1232:
--------------------------------------
I've investigated the failure of the assert and found minimal query to
reproduce.
{code}
select rootOrderId
from (
select rootOrderId from "part".CustOrder
union all
select rootOrderId from "part".ReplaceOrder
) co
{code}
At the same time, test for union-ubquery works as well.
To properly fix it, I need more understanding in {{GridH2CollocationModel}},
especially what is the right tree of {{GridH2CollocationModel}} objects in case
of inner union?
I see at least 2 possible trees:
1.
GridH2CollocationModel_1(upper=null) -
represents all query
|---GridH2CollocationModel_2(upper=GridH2CollocationModel_1, ) -
represents union query (unions list here)
|---GridH2CollocationModel_3 -
represents left union query
|---GridH2CollocationModel_4 -
represents right union query
2.
GridH2CollocationModel_1(upper=null) -
represents all query (unions list here)
|---GridH2CollocationModel_2 -
represents left union query
|---GridH2CollocationModel_3 -
represents right union query
>From current implementation I see that we want to achieve the second tree, but
>it looks like wrong and we should have the first one.
> Support distributed SQL JOIN
> -----------------------------
>
> Key: IGNITE-1232
> URL: https://issues.apache.org/jira/browse/IGNITE-1232
> Project: Ignite
> Issue Type: Improvement
> Reporter: Sergi Vladykin
> Assignee: Sergi Vladykin
> Fix For: 1.6
>
>
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