Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/17488#discussion_r109069839
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/FlatMapGroupsWithStateExec.scala
---
@@ -68,6 +68,17 @@ case class FlatMapGroupsWithStateExec(
val encSchemaAttribs = stateEncoder.schema.toAttributes
if (isTimeoutEnabled) encSchemaAttribs :+ timestampTimeoutAttribute
else encSchemaAttribs
}
+ // Converter for translating state Java objects to rows
+ private val stateSerializer = {
+ val encoderSerializer = stateEncoder.namedExpressions
+ if (isTimeoutEnabled) {
+ encoderSerializer :+ Literal(GroupStateImpl.NO_TIMESTAMP)
+ } else {
+ encoderSerializer
+ }
+ }
+ private val stateDeserializer =
stateEncoder.resolveAndBind().deserializer
--- End diff --
Can you comment that this has to happen on the driver so we don't forget
why its here and move it?
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