pengzhiwei created CALCITE-2382:
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Summary: Column not found when subquery join lateral table function
Key: CALCITE-2382
URL: https://issues.apache.org/jira/browse/CALCITE-2382
Project: Calcite
Issue Type: Bug
Components: core
Affects Versions: 1.16.0
Reporter: pengzhiwei
Assignee: Julian Hyde
When use subquery join lateral table function as followed:
{code:java}
select * from ( select 5 as f0 from s.t ) a,lateral
table(s.GenerateStrings(f0)) as t(n, c) where char_length(c) > 3
{code}
'SqlValidatorException: Column 'F0' not found in any table' has thrown out.
I find the reason is that SqlValidatorImpl add the Identifier 's.t' namespace
to the children of tableScope,but not the subquey's namespace,just as the code
show bellow in SqlValidatorImpl#registerFrom:
{code:java}
case IDENTIFIER:
...........
if (tableScope == null) {
tableScope = new TableScope(parentScope, node);
}
tableScope.addChild(newNs, alias, forceNullable);{code}
I think the namespace of JoinScope's left child should be right for the child
of tableScope which was referenced by the table function,just as the code show
bellow in SqlValidatorImpl#registerFrom:
{code:java}
case COLLECTION_TABLE:
....
TableScope tableScope = null;
if(parentScope instanceof JoinScope) {
tableScope = new TableScope(new EmptyScope(this),operand);
JoinScope scope = (JoinScope) parentScope;
SqlValidatorNamespace leftNs = scope.getChildren().get(0);
tableScope.addChild(leftNs,scope.children.get(0).name,forceNullable);
}
....{code}
After this modification,the case upon runs well.
Is there any problem for this modification? Any suggestions is welcomed.Thanks
a lot.
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