imback82 commented on a change in pull request #27444: [SPARK-30614][SQL] The
native ALTER COLUMN syntax should change one property at a time
URL: https://github.com/apache/spark/pull/27444#discussion_r375024492
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/catalyst/analysis/ResolveSessionCatalog.scala
##########
@@ -89,20 +85,23 @@ class ResolveSessionCatalog(
throw new AnalysisException("" +
"ALTER COLUMN ... FIRST | ALTER is only supported with v2
tables.")
}
+
+ val colName = a.column(0)
+ val dataType = a.dataType.getOrElse(v1Table.schema(colName).dataType)
Review comment:
Sure.
I noticed that we are not considering case sensitivities in v2 tables
either:
https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala#L432.
I can do a follow up PR for this if needed.
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