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https://issues.apache.org/jira/browse/FLINK-16108?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jark Wu reassigned FLINK-16108:
-------------------------------
Assignee: Jark Wu
> StreamSQLExample is failed if running in blink planner
> ------------------------------------------------------
>
> Key: FLINK-16108
> URL: https://issues.apache.org/jira/browse/FLINK-16108
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / Planner
> Reporter: Jark Wu
> Assignee: Jark Wu
> Priority: Critical
> Fix For: 1.10.1
>
>
> {{StreamSQLExample}} in flink-example will fail if the specified planner is
> blink planner. Exception is as following:
> {code}
> Exception in thread "main" org.apache.flink.table.api.ValidationException:
> Field types of query result and registered TableSink do not match.
> Query schema: [user: BIGINT, product: STRING, amount: INT]
> Sink schema: [amount: INT, product: STRING, user: BIGINT]
> at
> org.apache.flink.table.planner.sinks.TableSinkUtils$.validateSchemaAndApplyImplicitCast(TableSinkUtils.scala:96)
> at
> org.apache.flink.table.planner.delegation.PlannerBase.translateToRel(PlannerBase.scala:229)
> at
> org.apache.flink.table.planner.delegation.PlannerBase$$anonfun$1.apply(PlannerBase.scala:150)
> at
> org.apache.flink.table.planner.delegation.PlannerBase$$anonfun$1.apply(PlannerBase.scala:150)
> at
> scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
> at
> scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
> at scala.collection.Iterator$class.foreach(Iterator.scala:891)
> at scala.collection.AbstractIterator.foreach(Iterator.scala:1334)
> at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
> at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
> at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
> at scala.collection.AbstractTraversable.map(Traversable.scala:104)
> at
> org.apache.flink.table.planner.delegation.PlannerBase.translate(PlannerBase.scala:150)
> at
> org.apache.flink.table.api.java.internal.StreamTableEnvironmentImpl.toDataStream(StreamTableEnvironmentImpl.java:361)
> at
> org.apache.flink.table.api.java.internal.StreamTableEnvironmentImpl.toAppendStream(StreamTableEnvironmentImpl.java:269)
> at
> org.apache.flink.table.api.java.internal.StreamTableEnvironmentImpl.toAppendStream(StreamTableEnvironmentImpl.java:260)
> at
> org.apache.flink.table.examples.java.StreamSQLExample.main(StreamSQLExample.java:90)
> Process finished with exit code 1
> {code}
> That's because blink planner will also validate the sink schema even if it is
> come from {{toAppendStream()}}. However, the
> {{TableSinkUtils#inferSinkPhysicalDataType}} should derive sink schema from
> query schema when the requested type is POJO [1], because fields order of
> POJO is not deterministic.
> [1]:
> https://github.com/apache/flink/blob/master/flink-table/flink-table-planner-blink/src/main/scala/org/apache/flink/table/planner/sinks/TableSinkUtils.scala#L237
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