aokolnychyi commented on code in PR #50593:
URL: https://github.com/apache/spark/pull/50593#discussion_r2044978604
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/ColumnDefinition.scala:
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@@ -203,8 +206,19 @@ case class DefaultValueExpression(child: Expression,
originalSQL: String)
// Convert the default expression to ColumnDefaultValue, which is required
by DS v2 APIs.
def toV2(statement: String, colName: String): ColumnDefaultValue = child
match {
case Literal(value, dataType) =>
- new ColumnDefaultValue(originalSQL, LiteralValue(value, dataType))
+ val literalV2 = LiteralValue(value, dataType)
+ val exprV2 = if (exposeCurrentDefaultAsExprV2) literalV2 else null
+ new ColumnDefaultValue(originalSQL, exprV2, literalV2)
case _ =>
throw QueryCompilationErrors.defaultValueNotConstantError(statement,
colName, originalSQL)
}
}
+
+object DefaultValueExpression {
+ def apply(expr: Expression, originalSQL: String): DefaultValueExpression = {
+ // only expose V2 expressions as current defaults if all Catalyst
expressions are evaluable
+ // Catalyst expressions like CURRENT_USER or CURRENT_DATE will require
special handling
Review Comment:
I will work on this in a separate PR.
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