xiong duan created CALCITE-6899:
-----------------------------------

             Summary: Mismatch of Trait information results in a missing 
conversion exception
                 Key: CALCITE-6899
                 URL: https://issues.apache.org/jira/browse/CALCITE-6899
             Project: Calcite
          Issue Type: Bug
            Reporter: xiong duan


The unit test in RelOptRulesTest:
{code:java}
@Test void testEnumerableFilterRule() {
  final String sql = "select ename from emp where sal > all (select comm from 
emp)";
  sql(sql)
      .withVolcanoPlanner(false, p -> {
        p.addRelTraitDef(RelDistributionTraitDef.INSTANCE);
        p.addRule(CoreRules.FILTER_SUB_QUERY_TO_CORRELATE);
        p.addRule(EnumerableRules.ENUMERABLE_FILTER_RULE);
        p.addRule(EnumerableRules.ENUMERABLE_PROJECT_RULE);
        p.addRule(EnumerableRules.ENUMERABLE_TABLE_SCAN_RULE);
        p.addRule(EnumerableRules.ENUMERABLE_JOIN_RULE);
        p.addRule(EnumerableRules.ENUMERABLE_AGGREGATE_RULE);
      }).check();
} {code}
It throws an exception:
{code:java}
There are not enough rules to produce a node with desired properties: 
convention=ENUMERABLE, dist=any.
Missing conversion is LogicalFilter[convention: NONE -> ENUMERABLE]
There is 1 empty subset: rel#39:RelSubset#1.ENUMERABLE.broadcast, the relevant 
part of the original plan is as follows
14:LogicalFilter(condition=[NOT(<= SOME($5, {
LogicalProject(COMM=[$6])
  LogicalTableScan(table=[[CATALOG, SALES, EMP]])
}))])
  8:LogicalTableScan(subset=[rel#13:RelSubset#0.NONE.any], table=[[CATALOG, 
SALES, EMP]]) {code}



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