Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/4471#discussion_r132285502
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/runtime/join/ProcTimeNonWindowInnerJoin.scala
---
@@ -0,0 +1,275 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package org.apache.flink.table.runtime.join
+
+import org.apache.flink.api.common.functions.RichFlatJoinFunction
+import org.apache.flink.api.common.state._
+import org.apache.flink.api.common.typeinfo.TypeInformation
+import org.apache.flink.api.java.typeutils.{ResultTypeQueryable,
TupleTypeInfo}
+import org.apache.flink.configuration.Configuration
+import org.apache.flink.streaming.api.functions.co.CoProcessFunction
+import org.apache.flink.table.api.{StreamQueryConfig, Types}
+import org.apache.flink.table.runtime.CRowWrappingMultiOuputCollector
+import org.apache.flink.table.runtime.types.CRow
+import org.apache.flink.types.Row
+import org.apache.flink.util.Collector
+import org.apache.flink.api.java.tuple.{Tuple2 => JTuple2}
+
+/**
+ * Connect data for left stream and right stream. Only use for innerJoin.
+ *
+ * @param joiner join function
+ * @param leftType the input type of left stream
+ * @param rightType the input type of right stream
+ * @param resultType the output type of join
+ * @param queryConfig
+ */
+class ProcTimeNonWindowInnerJoin(
+ joiner: RichFlatJoinFunction[Row, Row, Row],
+ leftType: TypeInformation[Row],
+ rightType: TypeInformation[Row],
+ resultType: TypeInformation[CRow],
+ queryConfig: StreamQueryConfig) extends
+ CoProcessFunction[CRow, CRow, CRow] with ResultTypeQueryable[CRow] {
+
+
+ // state to hold left stream element
+ private var leftState: MapState[Row, JTuple2[Int, Long]] = null
+ // state to hold right stream element
+ private var rightState: MapState[Row, JTuple2[Int, Long]] = null
+ private var cRowWrapper: CRowWrappingMultiOuputCollector = null
+
+ private val minRetentionTime: Long =
queryConfig.getMinIdleStateRetentionTime
+ private val maxRetentionTime: Long =
queryConfig.getMaxIdleStateRetentionTime
+ private val stateCleaningEnabled: Boolean = minRetentionTime > 1
+
+ // state to record last timer of left stream, 0 means no timer
+ private var timerState1: ValueState[Long] = _
--- End diff --
`leftTimer` instead of `timerState1`?
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