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https://issues.apache.org/jira/browse/IGNITE-1886?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15011397#comment-15011397
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Sergi Vladykin commented on IGNITE-1886:
----------------------------------------
This is fixed in newer H2 version.
> NPE in H2 when running query with subselects
> --------------------------------------------
>
> Key: IGNITE-1886
> URL: https://issues.apache.org/jira/browse/IGNITE-1886
> Project: Ignite
> Issue Type: Bug
> Components: cache
> Reporter: Valentin Kulichenko
> Assignee: Sergi Vladykin
> Priority: Critical
> Fix For: 1.5
>
> Attachments: QueryTest.java
>
>
> Test reproducing the issue is attached. NPE is thrown as a result (see below).
> Corresponding user@ thread:
> http://apache-ignite-users.70518.x6.nabble.com/Does-Ignite-support-nested-SQL-Queries-td1714.html
> {noformat}
> Exception in thread "main" javax.cache.CacheException: class
> org.apache.ignite.IgniteException: Failed to parse query: SELECT a.* FROM
> (SELECT CASE WHEN u.id < 100 THEN u.id ELSE ug.id END id FROM
> "UserCache".user u, userorder ug WHERE u.id = ug.usrid) a, (SELECT CASE WHEN
> og.goodid < 5 THEN 100 ELSE og.goodid END id FROM userorder ug,
> "OrderGoodCache".ordergood og WHERE ug.id = og.orderid) b WHERE a.id = b.id
> at
> org.apache.ignite.internal.processors.cache.IgniteCacheProxy.query(IgniteCacheProxy.java:636)
> at
> org.apache.ignite.examples.ExampleNodeStartup.main(ExampleNodeStartup.java:70)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:606)
> at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)
> Caused by: class org.apache.ignite.IgniteException: Failed to parse query:
> SELECT a.* FROM (SELECT CASE WHEN u.id < 100 THEN u.id ELSE ug.id END id FROM
> "UserCache".user u, userorder ug WHERE u.id = ug.usrid) a, (SELECT CASE WHEN
> og.goodid < 5 THEN 100 ELSE og.goodid END id FROM userorder ug,
> "OrderGoodCache".ordergood og WHERE ug.id = og.orderid) b WHERE a.id = b.id
> at
> org.apache.ignite.internal.processors.query.GridQueryProcessor.queryTwoStep(GridQueryProcessor.java:641)
> at
> org.apache.ignite.internal.processors.cache.IgniteCacheProxy.query(IgniteCacheProxy.java:627)
> ... 6 more
> Caused by: class org.apache.ignite.IgniteCheckedException: Failed to parse
> query: SELECT a.* FROM (SELECT CASE WHEN u.id < 100 THEN u.id ELSE ug.id END
> id FROM "UserCache".user u, userorder ug WHERE u.id = ug.usrid) a, (SELECT
> CASE WHEN og.goodid < 5 THEN 100 ELSE og.goodid END id FROM userorder ug,
> "OrderGoodCache".ordergood og WHERE ug.id = og.orderid) b WHERE a.id = b.id
> at
> org.apache.ignite.internal.processors.query.GridQueryProcessor.executeQuery(GridQueryProcessor.java:1510)
> at
> org.apache.ignite.internal.processors.query.GridQueryProcessor.queryTwoStep(GridQueryProcessor.java:634)
> ... 7 more
> Caused by: javax.cache.CacheException: Failed to parse query: SELECT a.* FROM
> (SELECT CASE WHEN u.id < 100 THEN u.id ELSE ug.id END id FROM
> "UserCache".user u, userorder ug WHERE u.id = ug.usrid) a, (SELECT CASE WHEN
> og.goodid < 5 THEN 100 ELSE og.goodid END id FROM userorder ug,
> "OrderGoodCache".ordergood og WHERE ug.id = og.orderid) b WHERE a.id = b.id
> at
> org.apache.ignite.internal.processors.query.h2.IgniteH2Indexing.queryTwoStep(IgniteH2Indexing.java:938)
> at
> org.apache.ignite.internal.processors.query.GridQueryProcessor$4.applyx(GridQueryProcessor.java:636)
> at
> org.apache.ignite.internal.processors.query.GridQueryProcessor$4.applyx(GridQueryProcessor.java:634)
> at
> org.apache.ignite.internal.util.lang.IgniteOutClosureX.apply(IgniteOutClosureX.java:36)
> at
> org.apache.ignite.internal.processors.query.GridQueryProcessor.executeQuery(GridQueryProcessor.java:1492)
> ... 8 more
> Caused by: org.h2.jdbc.JdbcSQLException: General error:
> "java.lang.NullPointerException" [50000-175]
> at org.h2.message.DbException.getJdbcSQLException(DbException.java:332)
> at org.h2.message.DbException.get(DbException.java:161)
> at org.h2.message.DbException.convert(DbException.java:284)
> at org.h2.message.DbException.toSQLException(DbException.java:257)
> at org.h2.message.TraceObject.logAndConvert(TraceObject.java:368)
> at org.h2.jdbc.JdbcConnection.prepareStatement(JdbcConnection.java:270)
> at
> org.apache.ignite.internal.processors.query.h2.IgniteH2Indexing.queryTwoStep(IgniteH2Indexing.java:935)
> ... 12 more
> Caused by: java.lang.NullPointerException
> at org.h2.expression.Function.getCost(Function.java:2391)
> at org.h2.expression.Comparison.getCost(Comparison.java:480)
> at org.h2.expression.ConditionAndOr.optimize(ConditionAndOr.java:133)
> at org.h2.expression.ConditionAndOr.optimize(ConditionAndOr.java:131)
> at org.h2.command.dml.Select.prepare(Select.java:813)
> at org.h2.command.Parser.prepare(Parser.java:220)
> at org.h2.engine.Session.prepare(Session.java:403)
> at org.h2.index.ViewIndex.getCost(ViewIndex.java:159)
> at org.h2.table.TableView.getBestPlanItem(TableView.java:210)
> at org.h2.table.TableFilter.getBestPlanItem(TableFilter.java:184)
> at org.h2.table.Plan.calculateCost(Plan.java:111)
> at org.h2.command.dml.Optimizer.testPlan(Optimizer.java:177)
> at
> org.h2.command.dml.Optimizer.calculateBruteForceAll(Optimizer.java:106)
> at org.h2.command.dml.Optimizer.calculateBestPlan(Optimizer.java:83)
> at org.h2.command.dml.Optimizer.optimize(Optimizer.java:230)
> at org.h2.command.dml.Select.preparePlan(Select.java:933)
> at org.h2.command.dml.Select.prepare(Select.java:834)
> at org.h2.command.Parser.prepareCommand(Parser.java:240)
> at org.h2.engine.Session.prepareLocal(Session.java:436)
> at org.h2.engine.Session.prepareCommand(Session.java:379)
> at org.h2.jdbc.JdbcConnection.prepareCommand(JdbcConnection.java:1138)
> at
> org.h2.jdbc.JdbcPreparedStatement.<init>(JdbcPreparedStatement.java:70)
> at org.h2.jdbc.JdbcConnection.prepareStatement(JdbcConnection.java:267)
> ... 13 more
> {noformat}
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