viirya commented on code in PR #50792:
URL: https://github.com/apache/spark/pull/50792#discussion_r2078009535
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/connector/catalog/CatalogV2Util.scala:
##########
@@ -598,10 +598,28 @@ private[sql] object CatalogV2Util {
// data unchanged and let the data reader to return "exist
default" for missing
// columns.
val existingDefault = Literal(default.getValue.value(),
default.getValue.dataType()).sql
-
f.withExistenceDefaultValue(existingDefault).withCurrentDefaultValue(default.getSql)
+
f.withExistenceDefaultValue(existingDefault).withCurrentDefaultValue(toSql(defaultValue))
}.getOrElse(f)
}
+ private def toSql(defaultValue: DefaultValue): String = {
+ if (defaultValue.getExpression != null) {
Review Comment:
Based on `DefaultValue` document, it uses expression first and fallbacks to
SQL string if the expression cannot be converted.
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