[IGNITE-13727] Calcite bug. Assertion on UNION with DISTINCT.

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 2.9
• Component/s: sql
• Labels: calcite
• Assignee: Konstantin Orlov
• Reporter: Evgeny Stanilovsky
• Created: 18/Nov/20 14:19
• Updated: 18/Feb/21 15:36
• Resolved: 18/Feb/21 15:36

Description

SELECT distinct(name) FROM Orders UNION SELECT name from Account

breaks Calcite with assertion:

java.lang.AssertionError: traits=IGNITE.[].any.one-way, distributionhash[0]
	at org.apache.calcite.rel.core.Exchange.<init>(Exchange.java:62)
	at org.apache.calcite.rel.core.Exchange.<init>(Exchange.java:71)
	at org.apache.ignite.internal.processors.query.calcite.rel.IgniteTrimExchange.<init>(IgniteTrimExchange.java:49)
	at SC.apply(Unknown Source)
	at org.apache.ignite.internal.processors.query.calcite.externalize.RelJson$RelFactory.apply(RelJson.java:115)
	at org.apache.ignite.internal.processors.query.calcite.externalize.RelJsonReader.readRel(RelJsonReader.java:111)
	at org.apache.ignite.internal.processors.query.calcite.externalize.RelJsonReader.readRels(RelJsonReader.java:103)
	at org.apache.ignite.internal.processors.query.calcite.externalize.RelJsonReader.read(RelJsonReader.java:92)
	at org.apache.ignite.internal.processors.query.calcite.externalize.RelJsonReader.fromJson(RelJsonReader.java:77)
	at org.apache.ignite.internal.processors.query.calcite.exec.ExecutionServiceImpl.prepareFragment(ExecutionServiceImpl.java:522)
	at org.apache.ignite.internal.processors.query.calcite.prepare.QueryPlanCacheImpl.queryPlan(QueryPlanCacheImpl.java:84)
	at org.apache.ignite.internal.processors.query.calcite.exec.ExecutionServiceImpl.onMessage(ExecutionServiceImpl.java:860)
	at org.apache.ignite.internal.processors.query.calcite.exec.ExecutionServiceImpl.lambda$init$1(ExecutionServiceImpl.java:435)
	at org.apache.ignite.internal.processors.query.calcite.message.MessageServiceImpl.onMessageInternal(MessageServiceImpl.java:276)
	at org.apache.ignite.internal.processors.query.calcite.message.MessageServiceImpl.lambda$onMessage$0(MessageServiceImpl.java:256)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)

appropriate plan:

IgniteReduceAggregate(rowType=[RecordType(JavaType(class java.lang.String) NAME)], group=[{0}]): rowcount = 110.0, cumulative cost = 6140.0, id = 244
  IgniteExchange(distribution=[single]): rowcount = 110.0, cumulative cost = 6030.0, id = 243
    IgniteMapAggregate(group=[{0}]): rowcount = 110.0, cumulative cost = 4710.0, id = 242
      IgniteUnionAll(all=[true]): rowcount = 1100.0, cumulative cost = 4600.0, id = 241
        IgniteTrimExchange(distribution=[hash[0]]): rowcount = 100.0, cumulative cost = 2500.0, id = 240
          IgniteReduceAggregate(rowType=[RecordType(JavaType(class java.lang.String) NAME)], group=[{0}]): rowcount = 100.0, cumulative cost = 2400.0, id = 239
            IgniteExchange(distribution=[broadcast]): rowcount = 100.0, cumulative cost = 2300.0, id = 238
              IgniteMapAggregate(group=[{0}]): rowcount = 100.0, cumulative cost = 1100.0, id = 237
                IgniteTableScan(table=[[PUBLIC, ORDERS]], requiredColunms=[{2}]): rowcount = 1000.0, cumulative cost = 1000.0, id = 65
        IgniteTableScan(table=[[PUBLIC, ACCOUNT]], requiredColunms=[{2}]): rowcount = 1000.0, cumulative cost = 1000.0, id = 97

Issue Links

• duplicates: IGNITE-13817 Calcite bug. Select count assertionError
• is fixed by: IGNITE-13817 Calcite bug. Select count assertionError
• is part of: IGNITE-12248 Apache Calcite based query execution engine