[
https://issues.apache.org/jira/browse/IGNITE-4338?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Alexander Paschenko updated IGNITE-4338:
----------------------------------------
Description:
Inspired by IGNITE-4334.
Suppose we have two caches, one partitioned and one replicated. The following
operation fails:
{code:java}
ignite.cache("replicated").query(new SqlFieldsQuery("select _key, _val from
\"partitioned\".SomeType")).getAll();
{code}
Exception is as follows:
{noformat}
Exception in thread "main" javax.cache.CacheException: Queries running on
replicated cache should not contain JOINs with partitioned tables
[rCache=replicated, pCache=partitioned]
at
org.apache.ignite.internal.processors.query.h2.twostep.GridReduceQueryExecutor.stableDataNodes(GridReduceQueryExecutor.java:432)
at
org.apache.ignite.internal.processors.query.h2.twostep.GridReduceQueryExecutor.query(GridReduceQueryExecutor.java:529)
at
org.apache.ignite.internal.processors.query.h2.IgniteH2Indexing$5.iterator(IgniteH2Indexing.java:1119)
at
org.apache.ignite.internal.processors.cache.QueryCursorImpl.iterator(QueryCursorImpl.java:98)
at
org.apache.ignite.internal.processors.cache.QueryCursorImpl.getAll(QueryCursorImpl.java:117)
...
{noformat}
The reason is that during query analysis
({{org.apache.ignite.internal.processors.query.h2.IgniteH2Indexing#queryTwoStep}})
we always deem leftmost cache (the one that the {{query}} method was called
on) as participating in the query which is clearly not true in the above
example. Then we add to the query the schema it actually used (it's the cache
named *partitioned* in this case), and resulting two-step query looks as if its
SQL contained {{JOIN}} on *partitioned* and *replicated* caches which we don't
support for now.
Will consult Sergi about what to do next. According to Vlad, this should not
affect the release in any way and thus won't be fixed in 1.8.
> Cross-schema SQL SELECT on partitioned cache fails for no good reason
> ---------------------------------------------------------------------
>
> Key: IGNITE-4338
> URL: https://issues.apache.org/jira/browse/IGNITE-4338
> Project: Ignite
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.8
> Reporter: Alexander Paschenko
> Fix For: 2.0
>
>
> Inspired by IGNITE-4334.
> Suppose we have two caches, one partitioned and one replicated. The following
> operation fails:
> {code:java}
> ignite.cache("replicated").query(new SqlFieldsQuery("select _key, _val from
> \"partitioned\".SomeType")).getAll();
> {code}
> Exception is as follows:
> {noformat}
> Exception in thread "main" javax.cache.CacheException: Queries running on
> replicated cache should not contain JOINs with partitioned tables
> [rCache=replicated, pCache=partitioned]
> at
> org.apache.ignite.internal.processors.query.h2.twostep.GridReduceQueryExecutor.stableDataNodes(GridReduceQueryExecutor.java:432)
> at
> org.apache.ignite.internal.processors.query.h2.twostep.GridReduceQueryExecutor.query(GridReduceQueryExecutor.java:529)
> at
> org.apache.ignite.internal.processors.query.h2.IgniteH2Indexing$5.iterator(IgniteH2Indexing.java:1119)
> at
> org.apache.ignite.internal.processors.cache.QueryCursorImpl.iterator(QueryCursorImpl.java:98)
> at
> org.apache.ignite.internal.processors.cache.QueryCursorImpl.getAll(QueryCursorImpl.java:117)
> ...
> {noformat}
> The reason is that during query analysis
> ({{org.apache.ignite.internal.processors.query.h2.IgniteH2Indexing#queryTwoStep}})
> we always deem leftmost cache (the one that the {{query}} method was called
> on) as participating in the query which is clearly not true in the above
> example. Then we add to the query the schema it actually used (it's the cache
> named *partitioned* in this case), and resulting two-step query looks as if
> its SQL contained {{JOIN}} on *partitioned* and *replicated* caches which we
> don't support for now.
> Will consult Sergi about what to do next. According to Vlad, this should not
> affect the release in any way and thus won't be fixed in 1.8.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
