godfreyhe commented on a change in pull request #14663:
URL: https://github.com/apache/flink/pull/14663#discussion_r558185519
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File path:
flink-table/flink-table-planner-blink/src/main/java/org/apache/flink/table/planner/plan/nodes/exec/common/CommonExecLookupJoin.java
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@@ -0,0 +1,445 @@
+package org.apache.flink.table.planner.plan.nodes.exec.common;
+
+import org.apache.flink.api.common.functions.FlatMapFunction;
+import org.apache.flink.api.common.typeinfo.TypeInformation;
+import org.apache.flink.api.dag.Transformation;
+import org.apache.flink.api.java.typeutils.RowTypeInfo;
+import org.apache.flink.streaming.api.datastream.AsyncDataStream;
+import org.apache.flink.streaming.api.functions.ProcessFunction;
+import org.apache.flink.streaming.api.functions.async.AsyncFunction;
+import org.apache.flink.streaming.api.operators.ProcessOperator;
+import org.apache.flink.streaming.api.operators.SimpleOperatorFactory;
+import org.apache.flink.streaming.api.operators.StreamOperatorFactory;
+import org.apache.flink.streaming.api.operators.async.AsyncWaitOperatorFactory;
+import org.apache.flink.streaming.api.transformations.OneInputTransformation;
+import org.apache.flink.table.api.TableConfig;
+import org.apache.flink.table.api.TableException;
+import org.apache.flink.table.api.config.ExecutionConfigOptions;
+import org.apache.flink.table.catalog.DataTypeFactory;
+import org.apache.flink.table.connector.source.LookupTableSource;
+import org.apache.flink.table.data.RowData;
+import org.apache.flink.table.data.conversion.DataStructureConverter;
+import org.apache.flink.table.data.conversion.DataStructureConverters;
+import org.apache.flink.table.functions.AsyncTableFunction;
+import org.apache.flink.table.functions.TableFunction;
+import org.apache.flink.table.functions.UserDefinedFunction;
+import org.apache.flink.table.planner.calcite.FlinkTypeFactory;
+import org.apache.flink.table.planner.codegen.CodeGeneratorContext;
+import org.apache.flink.table.planner.codegen.LookupJoinCodeGenerator;
+import org.apache.flink.table.planner.delegation.PlannerBase;
+import org.apache.flink.table.planner.plan.nodes.exec.ExecEdge;
+import org.apache.flink.table.planner.plan.nodes.exec.ExecNode;
+import org.apache.flink.table.planner.plan.nodes.exec.ExecNodeBase;
+import org.apache.flink.table.planner.plan.schema.LegacyTableSourceTable;
+import org.apache.flink.table.planner.plan.schema.TableSourceTable;
+import org.apache.flink.table.planner.plan.utils.LookupJoinUtil;
+import org.apache.flink.table.planner.utils.JavaScalaConversionUtil;
+import org.apache.flink.table.planner.utils.ShortcutUtils;
+import org.apache.flink.table.runtime.collector.TableFunctionCollector;
+import org.apache.flink.table.runtime.collector.TableFunctionResultFuture;
+import org.apache.flink.table.runtime.generated.GeneratedCollector;
+import org.apache.flink.table.runtime.generated.GeneratedFunction;
+import org.apache.flink.table.runtime.generated.GeneratedResultFuture;
+import org.apache.flink.table.runtime.operators.join.FlinkJoinType;
+import
org.apache.flink.table.runtime.operators.join.lookup.AsyncLookupJoinRunner;
+import
org.apache.flink.table.runtime.operators.join.lookup.AsyncLookupJoinWithCalcRunner;
+import org.apache.flink.table.runtime.operators.join.lookup.LookupJoinRunner;
+import
org.apache.flink.table.runtime.operators.join.lookup.LookupJoinWithCalcRunner;
+import org.apache.flink.table.runtime.types.TypeInfoDataTypeConverter;
+import org.apache.flink.table.runtime.typeutils.InternalSerializers;
+import org.apache.flink.table.runtime.typeutils.InternalTypeInfo;
+import org.apache.flink.table.sources.LookupableTableSource;
+import org.apache.flink.table.sources.TableSource;
+import org.apache.flink.table.types.logical.LogicalType;
+import org.apache.flink.table.types.logical.RowType;
+
+import org.apache.calcite.plan.RelOptTable;
+import org.apache.calcite.rex.RexNode;
+import org.apache.calcite.rex.RexProgram;
+import org.apache.calcite.tools.RelBuilder;
+import org.apache.commons.lang3.StringUtils;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+
+import scala.Option;
+
+/**
+ * Base {@link ExecNode} for temporal table join which shares most methods.
+ *
+ * <p>For a lookup join query:
+ *
+ * <pre>
+ * SELECT T.id, T.content, D.age
+ * FROM T JOIN userTable FOR SYSTEM_TIME AS OF T.proctime AS D
+ * ON T.content = concat(D.name, '!') AND D.age = 11 AND T.id = D.id
+ * WHERE D.name LIKE 'Jack%'
+ * </pre>
+ *
+ * <p>The LookupJoin physical node encapsulates the following RelNode tree:
+ *
+ * <pre>
+ * Join (l.name = r.name)
+ * / \
+ * RelNode Calc (concat(name, "!") as name, name LIKE 'Jack%')
+ * |
+ * DimTable (lookup-keys: age=11, id=l.id)
+ * (age, id, name)
+ * </pre>
+ *
+ * <ul>
+ * <li>lookupKeys: [$0=11, $1=l.id] ($0 and $1 is the indexes of age and id
in dim table)
+ * <li>calcOnTemporalTable: calc on temporal table rows before join
+ * <li>joinCondition: join condition on temporal table rows after calc
+ * </ul>
+ *
+ * <p>The workflow of lookup join:
+ *
+ * <p>1) lookup records dimension table using the lookup-keys <br>
+ * 2) project & filter on the lookup-ed records <br>
+ * 3) join left input record and lookup-ed records <br>
+ * 4) only outputs the rows which match to the condition <br>
+ */
+public abstract class CommonExecLookupJoin extends ExecNodeBase<RowData> {
Review comment:
nit: there are a lot of warnings because many classes lack type parameter
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