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Posted to issues@calcite.apache.org by "zhishui (Jira)" <ji...@apache.org> on 2020/08/29 13:43:00 UTC
[jira] [Commented] (CALCITE-4198) Query contains AVG function,
materialized view contains SUM and COUNT functions, and materialized
recognition fails
[ https://issues.apache.org/jira/browse/CALCITE-4198?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17186979#comment-17186979 ]
zhishui commented on CALCITE-4198:
----------------------------------
could assign to me, I think I have a solution to how to resolve it
> 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
> Priority: Major
>
> 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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