gengliangwang commented on a change in pull request #33258:
URL: https://github.com/apache/spark/pull/33258#discussion_r667622706
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/datetimeExpressions.scala
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@@ -200,6 +200,30 @@ case class Now() extends CurrentTimestampLike {
override def prettyName: String = "now"
}
+/**
+ * Returns the current timestamp without time zone at the start of query
evaluation.
+ * There is no code generation since this expression should get constant
folded by the optimizer.
+ */
+// scalastyle:off line.size.limit
+@ExpressionDescription(
+ usage = """
+ _FUNC_() - Returns the current timestamp without time zone at the start of
query evaluation. All calls of localtimestamp within the same query return the
same value.
+
+ _FUNC_ - Returns the current timestamp without time zone at the start of
query evaluation.
Review comment:
Shall we just say "the current local date-time at the session time zone"
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