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https://issues.apache.org/jira/browse/FLINK-9715?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16635719#comment-16635719
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ASF GitHub Bot commented on FLINK-9715:
---------------------------------------
pnowojski commented on a change in pull request #6776: [FLINK-9715][table]
Support temporal join with event time
URL: https://github.com/apache/flink/pull/6776#discussion_r221622010
##########
File path:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/runtime/join/TemporalProcessTimeJoin.scala
##########
@@ -20,24 +20,24 @@ package org.apache.flink.table.runtime.join
import org.apache.flink.api.common.functions.FlatJoinFunction
import org.apache.flink.api.common.state.{ValueState, ValueStateDescriptor}
import org.apache.flink.api.common.typeinfo.TypeInformation
-import org.apache.flink.configuration.Configuration
-import org.apache.flink.streaming.api.functions.co.CoProcessFunction
+import org.apache.flink.streaming.api.operators.{AbstractStreamOperator,
TimestampedCollector, TwoInputStreamOperator}
+import org.apache.flink.streaming.runtime.streamrecord.StreamRecord
import org.apache.flink.table.api.StreamQueryConfig
import org.apache.flink.table.codegen.Compiler
import org.apache.flink.table.runtime.CRowWrappingCollector
import org.apache.flink.table.runtime.types.CRow
import org.apache.flink.table.typeutils.TypeCheckUtils._
import org.apache.flink.table.util.Logging
import org.apache.flink.types.Row
-import org.apache.flink.util.Collector
-class TemporalJoin(
+class TemporalProcessTimeJoin(
leftType: TypeInformation[Row],
rightType: TypeInformation[Row],
genJoinFuncName: String,
genJoinFuncCode: String,
queryConfig: StreamQueryConfig)
- extends CoProcessFunction[CRow, CRow, CRow]
+ extends AbstractStreamOperator[CRow]
Review comment:
The problem is that we need custom timestamp handling in `onEvenTime`
callbacks. As we discussed, modifying `CoProcessFunction` to suite our needs
would make it more complicated for other users.
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> Support versioned joins with event time
> ---------------------------------------
>
> Key: FLINK-9715
> URL: https://issues.apache.org/jira/browse/FLINK-9715
> Project: Flink
> Issue Type: Sub-task
> Components: Table API & SQL
> Affects Versions: 1.5.0
> Reporter: Piotr Nowojski
> Assignee: Piotr Nowojski
> Priority: Major
> Labels: pull-request-available
>
> Queries like:
> {code:java}
> SELECT
> o.amount * r.rate
> FROM
> Orders AS o,
> LATERAL TABLE (Rates(o.rowtime)) AS r
> WHERE o.currency = r.currency{code}
> should work with event time
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