cloud-fan commented on code in PR #45822:
URL: https://github.com/apache/spark/pull/45822#discussion_r1548924394
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/datetimeExpressions.scala:
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@@ -1235,11 +1235,13 @@ object TryToTimestampExpressionBuilder extends
ExpressionBuilder {
override def build(funcName: String, expressions: Seq[Expression]):
Expression = {
val numArgs = expressions.length
if (numArgs == 1 || numArgs == 2) {
- ParseToTimestamp(
+ // The expression ParseToTimestamp will throw an SparkUpgradeException
if the input is invalid
+ // even when failOnError is false. We need to catch the exception and
return null.
+ TryEval(ParseToTimestamp(
Review Comment:
so we need to maintain 3 behaviors:
1. `try_to_timestamp` never fails
2. `to_timestamp` ansi mode always fail with invalid input
3. `to_timestamp` non-ansi mode only fails with `SparkUpgradeException`
Do I understand it correctly?
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