AssHero commented on code in PR #4260:
URL: https://github.com/apache/arrow-datafusion/pull/4260#discussion_r1027022413
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datafusion/sql/src/planner.rs:
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@@ -1124,6 +1126,39 @@ impl<'a, S: ContextProvider> SqlToRel<'a, S> {
// process `from` clause
let plans = self.plan_from_tables(select.from, ctes,
outer_query_schema)?;
let empty_from = matches!(plans.first(),
Some(LogicalPlan::EmptyRelation(_)));
+ // build from schema for unqualifier column ambiguous check
+ // we should get only one field for this unqualifier column from
schema.
+ let from_schema = {
Review Comment:
> Maybe as a follow up PR we could factor this out into a function (as
`select_to_plan` is already quite long)
Thanks! @alamb I'll propose a follow up PR to handle this.
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