cloud-fan commented on a change in pull request #30881:
URL: https://github.com/apache/spark/pull/30881#discussion_r549935749
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/command/tables.scala
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@@ -764,13 +765,13 @@ case class DescribeColumnCommand(
val colName = UnresolvedAttribute(colNameParts).name
val field = {
relation.resolve(colNameParts, resolver).getOrElse {
- throw new AnalysisException(s"Column $colName does not exist")
+ throw QueryCompilationErrors.columnDoesNotExistError(colName)
}
}
if (!field.isInstanceOf[Attribute]) {
// If the field is not an attribute after `resolve`, then it's a nested
field.
- throw new AnalysisException(
- s"DESC TABLE COLUMN command does not support nested data types:
$colName")
+ throw QueryCompilationErrors.commandNotSupportNestedColumnError(
+ "DESC TABLE COLUMN", toPrettySQL(field, removeAlias = true))
Review comment:
We won't hit this branch anymore, as we fail earlier in
`ResolveSessionCatalog`. We can simply use
`assert(field.isInstanceOf[Attribute])`
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