[ https://issues.apache.org/jira/browse/CALCITE-6193?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Mou Wu updated CALCITE-6193: ---------------------------- Summary: SubstitutionVisitor stop trying incorrect subtree because wrong parent relationship when replace query (was: SubstitutionVisitor stop trying incorrect subtree because wrong parent relationship when attempt) > SubstitutionVisitor stop trying incorrect subtree because wrong parent > relationship when replace query > ------------------------------------------------------------------------------------------------------ > > Key: CALCITE-6193 > URL: https://issues.apache.org/jira/browse/CALCITE-6193 > Project: Calcite > Issue Type: Bug > Reporter: Mou Wu > Assignee: Mou Wu > Priority: Major > > {code:java} > @Test void testStopTryIncorrectSubtree() { > final String mv = "" > + "select \"empid\", \"deptno\"\n" > + "from \"emps\"\n" > + "where \"salary\" > 1000\n" > + "group by \"empid\", \"deptno\""; > final String query = "" > + "select t1.\"deptno\"\n" > + "from (\n" > + "select \"deptno\"\n" > + "from \"emps\"\n" > + "where \"salary\" > 1000\n" > + "union all\n" > + "select \"deptno\"\n" > + "from \"emps\"\n" > + "where \"salary\" > 1000\n" > + "group by \"deptno\"\n" > + ") as t1 inner join (\n" > + "select \"deptno\"\n" > + "from \"emps\"\n" > + "where \"salary\" > 1000\n" > + "group by \"deptno\"\n" > + ") as t2 on t1.\"deptno\" = t2.\"deptno\"\n"; > sql(mv, query) > .checkingThatResultContains("" > + "LogicalCalc(expr#0..1=[{inputs}], deptno=[$t0])\n" > + " LogicalJoin(condition=[=($0, $1)], joinType=[inner])\n" > + " LogicalUnion(all=[true])\n" > + " LogicalCalc(expr#0..4=[{inputs}], expr#5=[1000], > expr#6=[>($t3, $t5)], deptno=[$t1], $condition=[$t6])\n" > + " LogicalTableScan(table=[[hr, emps]])\n" > + " LogicalAggregate(group=[{1}])\n" > + " EnumerableTableScan(table=[[hr, MV0]])\n" > + " LogicalAggregate(group=[{1}])\n" > + " EnumerableTableScan(table=[[hr, MV0]])" > ).ok(); > }{code} > The test case above will fail because the second mv0 not be matched. > The root cause is that SubstitutionVisitor replace child nodes with > targetDescendant node itself, not a deep-copy replica, so they may share the > same node and the same parent node, so the incorrect parent relationship may > occur, it will make stopTrying be wrong. -- This message was sent by Atlassian Jira (v8.20.10#820010)