imback82 commented on a change in pull request #30881:
URL: https://github.com/apache/spark/pull/30881#discussion_r549906670
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/catalyst/analysis/ResolveSessionCatalog.scala
##########
@@ -235,8 +236,17 @@ class ResolveSessionCatalog(
case DescribeRelation(ResolvedV1TableOrViewIdentifier(ident),
partitionSpec, isExtended) =>
DescribeTableCommand(ident.asTableIdentifier, partitionSpec, isExtended)
- case DescribeColumn(ResolvedV1TableOrViewIdentifier(ident), colNameParts,
isExtended) =>
- DescribeColumnCommand(ident.asTableIdentifier, colNameParts, isExtended)
+ case DescribeColumn(ResolvedV1TableOrViewIdentifier(ident), column,
isExtended) =>
+ column match {
+ case u: UnresolvedAttribute =>
+ // For views, the column will not be resolved by `ResolveReferences`
because
+ // `ResolvedView` stores only the identifier.
+ DescribeColumnCommand(ident.asTableIdentifier, u.nameParts,
isExtended)
Review comment:
The comment was confusing since `DescribeColumnCommand` resolves the
column again. I updated to separate view and table matching to make the
intention clear. Thanks.
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