Github user zsxwing commented on a diff in the pull request:
https://github.com/apache/spark/pull/15949#discussion_r89017665
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/datetimeExpressions.scala
---
@@ -72,6 +72,28 @@ case class CurrentTimestamp() extends LeafExpression
with CodegenFallback {
}
/**
+ * Expression representing the current batch time, which is used by
StreamExecution to
+ * 1. prevent optimizer from pushing this expression below a stateful
operator
+ * 2. allow IncrementalExecution to substitute this expression with a
Literal(timestamp)
+ *
+ * There is no code generation since this expression should be replaced
with a literal.
+ */
+@ExpressionDescription(
+ usage = "_FUNC_() - Returns the current timestamp at the start of batch
evaluation.")
+case class CurrentBatchTimestamp(timestamp: Long) extends LeafExpression
--- End diff --
nit: `Long` -> `SQLTimestamp`
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org
For additional commands, e-mail: reviews-h...@spark.apache.org
