Shaofeng SHI created KYLIN-918:
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Summary: Calcite throws "java.lang.Float cannot be cast to
java.lang.Double" error while executing SQL
Key: KYLIN-918
URL: https://issues.apache.org/jira/browse/KYLIN-918
Project: Kylin
Issue Type: Bug
Components: Query Engine
Affects Versions: v0.7.3
Reporter: Shaofeng SHI
Assignee: liyang
This is from an eBay internal deployment which deployed with a latest build
from 0.7-staging (0.7.3-SNAPSHOT); User reported that running a SQL which got
such ClassCastException while it has no problem before; The error trace is:
{code}
Caused by: java.lang.ClassCastException: java.lang.Float cannot be cast to
java.lang.Double
at Baz$4.apply(Unknown Source)
at Baz$4.apply(Unknown Source)
at Baz$4.apply(Unknown Source)
at
org.apache.calcite.linq4j.EnumerableDefaults.groupBy_(EnumerableDefaults.java:737)
at
org.apache.calcite.linq4j.EnumerableDefaults.groupBy(EnumerableDefaults.java:677)
at
org.apache.calcite.linq4j.DefaultEnumerable.groupBy(DefaultEnumerable.java:301)
at Baz.bind(Unknown Source)
at
org.apache.calcite.jdbc.CalcitePrepare$CalciteSignature.enumerable(CalcitePrepare.java:281)
at
org.apache.calcite.jdbc.CalciteConnectionImpl.enumerable(CalciteConnectionImpl.java:235)
at
org.apache.calcite.jdbc.CalciteMetaImpl.createIterable(CalciteMetaImpl.java:476)
at
org.apache.calcite.avatica.AvaticaResultSet.execute(AvaticaResultSet.java:184)
at org.apache.calcite.jdbc.CalciteResultSet.execute(CalciteResultSet.java:63)
at org.apache.calcite.jdbc.CalciteResultSet.execute(CalciteResultSet.java:42)
at
org.apache.calcite.avatica.AvaticaConnection$1.execute(AvaticaConnection.java:473)
at
org.apache.calcite.jdbc.CalciteMetaImpl.prepareAndExecute(CalciteMetaImpl.java:508)
at
org.apache.calcite.avatica.AvaticaConnection.prepareAndExecuteInternal(AvaticaConnection.java:477)
at
org.apache.calcite.avatica.AvaticaStatement.executeInternal(AvaticaStatement.java:109)
... 84 more
{code}
The SQL is simple, like
select itemid, sum(column_a) from items group by itemid
I noticed the column "column_a" was declared as "float" in hive; After change
the type to "double" in hive and sync it to Kylin, the same SQL can run
successfully;
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