jin xing created CALCITE-3214:
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Summary: Add UnionToUnionRule for materialization matching
Key: CALCITE-3214
URL: https://issues.apache.org/jira/browse/CALCITE-3214
Project: Calcite
Issue Type: Bug
Components: core
Reporter: jin xing
Below materialization matching fails now
{code:java}
@Test public void testDEV() {
String sql0 = "select * from \"emps\" where \"empid\" < 300";
String sql1 = "select * from \"emps\" where \"empid\" > 200";
checkMaterialize(sql0 + " union all " + sql1, sql1 + " union all " + sql0);
}
{code}
This issue proposes to add a rule for union matching
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