panbingkun commented on code in PR #44900:
URL: https://github.com/apache/spark/pull/44900#discussion_r1467508723
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/ParseMode.scala:
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@@ -47,12 +47,17 @@ object ParseMode extends Logging {
/**
* Returns the parse mode from the given string.
*/
- def fromString(mode: String): ParseMode = mode.toUpperCase(Locale.ROOT)
match {
- case PermissiveMode.name => PermissiveMode
- case DropMalformedMode.name => DropMalformedMode
- case FailFastMode.name => FailFastMode
- case _ =>
- logWarning(s"$mode is not a valid parse mode. Using
${PermissiveMode.name}.")
- PermissiveMode
+ def fromString(mode: String): ParseMode = Option(mode).map {
+ v => v.toUpperCase(Locale.ROOT) match {
+ case PermissiveMode.name => PermissiveMode
+ case DropMalformedMode.name => DropMalformedMode
+ case FailFastMode.name => FailFastMode
+ case _ =>
+ logWarning(s"$v is not a valid parse mode. Using
${PermissiveMode.name}.")
+ PermissiveMode
+ }
+ }.getOrElse {
+ logWarning(s"mode is null and not a valid parse mode. Using
${PermissiveMode.name}.")
+ PermissiveMode
Review Comment:
Two options:
1.If the `mode` is null, it will fall back to `PermissiveMode`, just like
setting a non-null error value for the `mode`.
2.If `mode` is null, we throw a user-friendly error prompt instead of a
`NullPointerException`.
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