dtenedor commented on code in PR #36778:
URL: https://github.com/apache/spark/pull/36778#discussion_r905247002
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sql/catalyst/src/main/scala/org/apache/spark/sql/connector/catalog/CatalogV2Util.scala:
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@@ -203,6 +203,14 @@ private[sql] object CatalogV2Util {
})
}
+ case update: UpdateColumnDefaultValue =>
+ replace(schema, update.fieldNames, field =>
+ if (update.newDefaultValue().nonEmpty) {
Review Comment:
Good question. The new DEFAULT value string will be non-empty for any DDL
commands that set the default value, such as "ALTER TABLE t ALTER COLUMN c SET
DEFAULT ..." (this is enforced by the parser). On the other hand, commands that
drop the default value such as "ALTER TABLE t ALTER COLUMN c DROP DEFAULT" will
set this string to empty. I added this in a comment here to help explain.
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