linhongliu-db commented on a change in pull request #32959:
URL: https://github.com/apache/spark/pull/32959#discussion_r664343346
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala
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@@ -224,12 +224,12 @@ object DateTimeUtils {
* value. The return type is [[Option]] in order to distinguish between 0L
and null. The following
* formats are allowed:
*
- * `yyyy`
- * `yyyy-[m]m`
- * `yyyy-[m]m-[d]d`
- * `yyyy-[m]m-[d]d `
- * `yyyy-[m]m-[d]d [h]h:[m]m:[s]s.[ms][ms][ms][us][us][us][zone_id]`
- * `yyyy-[m]m-[d]dT[h]h:[m]m:[s]s.[ms][ms][ms][us][us][us][zone_id]`
+ * `[+-]y*`
+ * `[+-]y*-[m]m`
+ * `[+-]y*-[m]m-[d]d`
+ * `[+-]y*-[m]m-[d]d `
+ * `[+-]y*-[m]m-[d]d [h]h:[m]m:[s]s.[ms][ms][ms][us][us][us][zone_id]`
+ * `[+-]y*-[m]m-[d]dT[h]h:[m]m:[s]s.[ms][ms][ms][us][us][us][zone_id]`
* `[h]h:[m]m:[s]s.[ms][ms][ms][us][us][us][zone_id]`
Review comment:
I see. good catch.
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