wuchong commented on issue #8901: [FLINK-13003][table-planner-blink] Support Temporal TableFunction Join in blink planner URL: https://github.com/apache/flink/pull/8901#issuecomment-506621197 > Can you describe the rule process of LookupJoin and TemporalTableJoin separately? > And I strongly suggest you change class name of them, because them really make me confused... FOR SYSTEM_TIME AS OF: 1. Logical: `LogicalCorrelate` with `LogicalSnapshot` 2. `LogicalCorrelateToJoinFromTemporalTableRule` 3. FlinkLogical: `LogicalJoin` with `LogicalSnapshot` 4. `StreamExecLookupJoinRule` 5. Physical: `StreamExecLookupJoin` LATERAL udtf(left.proctime): 1. Logical: `LogicalCorrelate` with a `TemporalTableFunction` 2. `LogicalCorrelateToJoinFromTemporalTableFunctionRule` 3. FlinkLogical: `LogicalJoin` with a special join condition `TEMPORAL_JOIN_CONDITION` 4. `StreamExecTemporalJoinRule` 5. Physical: `StreamExecTemporalJoin`
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