dtenedor commented on code in PR #40710:
URL: https://github.com/apache/spark/pull/40710#discussion_r1161011837
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/ResolveDefaultColumns.scala:
##########
@@ -91,6 +90,25 @@ case class ResolveDefaultColumns(catalog: SessionCatalog)
extends Rule[LogicalPl
}
}
+ /**
+ * Checks if a logical plan is an INSERT INTO command where the inserted
data comes from a SELECT
+ * list, with possible other unary operators like sorting and/or alias(es)
in between.
+ */
+ private def insertsFromProject(i: InsertIntoStatement): Option[Project] = {
+ var node = i.query
+ def matches(node: LogicalPlan): Boolean = node match {
+ case _: GlobalLimit | _: LocalLimit | _: Offset | _: SubqueryAlias | _:
Sort => true
+ case _ => false
+ }
+ while (matches(node)) {
+ node = node.children.head
Review Comment:
Good question, I added a test for this:
```
insert into t2 (i, s) select default, default from t1 inner join t1 using
(i, s);
> true, 42L, "abc",
> true, 42L, "abc"
```
We want the `default` resolution to cover the topmost `select` list before
the join, but not any below, per the specification. For example, this should
not work:
```
insert into t2 (i, s) select i, s from (
select default as i, default as s from t1)
inner join t1
using (i, s);
```
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