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Posted to issues@flink.apache.org by GitBox <gi...@apache.org> on 2019/06/28 06:38:57 UTC

[GitHub] [flink] wuchong commented on issue #8901: [FLINK-13003][table-planner-blink] Support Temporal TableFunction Join in blink planner

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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