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https://issues.apache.org/jira/browse/CALCITE-4198?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
ASF GitHub Bot updated CALCITE-4198:
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Labels: pull-request-available (was: )
> Query contains AVG function, materialized view contains SUM and COUNT
> functions, and materialized recognition fails
> -------------------------------------------------------------------------------------------------------------------
>
> Key: CALCITE-4198
> URL: https://issues.apache.org/jira/browse/CALCITE-4198
> Project: Calcite
> Issue Type: Wish
> Reporter: xzh_dz
> Assignee: zhishui
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> There is a semantic equivalent case, which should be able to materialize and
> identify successfully, materialized view can express the calculation logic of
> query,but failed. This case can be reproduced as below.
> {code:java}
> // MaterializedViewSubstitutionVisitorTest
> @Test void testAvgMvMatch() {
> sql(
> "select \"empid\", sum(\"salary\"), count(\"salary\") from \"emps\"
> where \"empid\" > 10 group by \"empid\"",
> "select \"empid\", avg(\"salary\") from \"emps\" where \"empid\" > 10
> group by \"empid\"")
> .ok();
> }
> {code}
> The error message：
> {code:java}
> java.lang.AssertionError: Materialized view failed to be matched by optimized
> results:java.lang.AssertionError: Materialized view failed to be matched by
> optimized results: at
> org.apache.calcite.test.AbstractMaterializedViewTest.checkMaterialize(AbstractMaterializedViewTest.java:112)
> at
> org.apache.calcite.test.AbstractMaterializedViewTest.access$000(AbstractMaterializedViewTest.java:64)
> at
> org.apache.calcite.test.AbstractMaterializedViewTest$Sql.ok(AbstractMaterializedViewTest.java:227)
> at java.lang.invoke.MethodHandle.invokeWithArguments(MethodHandle.java:627)
> at
> org.apache.calcite.util.ImmutableBeans.lambda$makeDef$3(ImmutableBeans.java:275)
> at
> org.apache.calcite.util.ImmutableBeans$BeanImpl.invoke(ImmutableBeans.java:446)
> at com.sun.proxy.$Proxy12.ok(Unknown Source) at
> org.apache.calcite.test.MaterializedViewSubstitutionVisitorTest.testAvgMvMatch(MaterializedViewSubstitutionVisitorTest.java:101)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> {code}
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