[ https://issues.apache.org/jira/browse/CALCITE-4182?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ruben Q L updated CALCITE-4182: ------------------------------- Fix Version/s: 1.26.0 > MV recognition fails when query has constant filter for group by list in mv, > but without group by > ------------------------------------------------------------------------------------------------- > > Key: CALCITE-4182 > URL: https://issues.apache.org/jira/browse/CALCITE-4182 > Project: Calcite > Issue Type: Bug > Reporter: Wang Yanlin > Assignee: Wang Yanlin > Priority: Major > Labels: pull-request-available > Fix For: 1.26.0 > > Time Spent: 1h 10m > Remaining Estimate: 0h > > MV recognition fails when query has constant filter for group by list in mv, > but has no group by itself. > {noformat} > @Test void testConstantFilterInAgg() { > final String mv = "" > + "select \"name\", count(distinct \"deptno\") as cnt\n" > + "from \"emps\" group by \"name\""; > final String query = "" > + "select count(distinct \"deptno\") as cnt\n" > + "from \"emps\" where \"name\" = 'hello'"; > sql(mv, query).ok(); > } > {noformat} > This case fails, however we can see that, we can rewrite the query with mv > like this, suppose *mv* is the name of the table. > {noformat} > select cnt from mv where name = 'hello'; > {noformat} > However, this query has the same semantics with the query in the case, using > this query for mv recognition, the case will success > {noformat} > final String query = "" > + "select cnt from(\n" > + " select \"name\", count(distinct \"deptno\") as cnt " > + " from \"emps\" group by \"name\") t\n" > + "where \"name\" = 'hello'"; > {noformat} > But we cannot force users to only write their queries in this way, so maybe > we need to enhance the mv recognition ability of > {{AggregateOnCalcToAggregateUnifyRule to cover this case.}} -- This message was sent by Atlassian Jira (v8.3.4#803005)