== Abstract Syntax Tree ==
LogicalSink(table=[fluss.nexmark.output_a91562716d784baa9fdea2f0074f5d6f], fields=[bidder, bid_count, starttime, endtime])
+- LogicalProject(bidder=[$0], bid_count=[$2], starttime=[SESSION_START($1)], endtime=[SESSION_END($1)])
   +- LogicalAggregate(group=[{0, 1}], bid_count=[COUNT()])
      +- LogicalProject(bidder=[$1], $f1=[$SESSION($5, 10000:INTERVAL SECOND)])
         +- LogicalProject(auction=[$3.auction], bidder=[$3.bidder], price=[$3.price], channel=[$3.channel], url=[$3.url], dateTime=[$5], extra=[$3.extra])
            +- LogicalFilter(condition=[=($0, 2)])
               +- LogicalProject(event_type=[$0], person=[$1], auction=[$2], bid=[$3], dateTime=[$4], rowtime=[$5])
                  +- LogicalWatermarkAssigner(rowtime=[rowtime], watermark=[-($5, 4000:INTERVAL SECOND)])
                     +- LogicalProject(event_type=[$0], person=[$1], auction=[$2], bid=[$3], dateTime=[$4], rowtime=[TO_TIMESTAMP_LTZ($4, 3)])
                        +- LogicalTableScan(table=[[fluss, nexmark, events]])

== Optimized Physical Plan ==
NativeFlussSink(reuseBarrier=[1770])
+- NativeCalc(reuseBarrier=[1769])
   +- NativeColumnarSessionWindowAggregate(reuseBarrier=[1768])
      +- NativeColumnarExchange(reuseBarrier=[1767])
         +- NativeCalc(reuseBarrier=[1766])
            +- NativeFlussSource(table=[nexmark.events], reuseBarrier=[1765])

== Optimized Execution Plan ==
NativeFlussSink
+- NativeCalc
   +- NativeColumnarSessionWindowAggregate
      +- NativeColumnarExchange
         +- NativeCalc
            +- NativeFlussSource(table=[nexmark.events])

== Physical Execution Plan ==
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    "id" : 2133,
    "type" : "Source: native-fluss-source",
    "pact" : "Data Source",
    "contents" : "Source: native-fluss-source",
    "parallelism" : 4
  }, {
    "id" : 2134,
    "type" : "NativeCalcExecNode[1420]",
    "pact" : "Operator",
    "contents" : "[1420]:NativeCalc",
    "parallelism" : 4,
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      "id" : 2133,
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  }, {
    "id" : 2135,
    "type" : "NativeColumnarExchangeExecNode[1421]",
    "pact" : "Operator",
    "contents" : "[1421]:NativeColumnarExchange",
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    "predecessors" : [ {
      "id" : 2134,
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      "side" : "second"
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    "type" : "NativeColumnarSessionWindowAggExecNode[1422]",
    "pact" : "Operator",
    "contents" : "[1422]:NativeColumnarSessionWindowAggregate",
    "parallelism" : 4,
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      "ship_strategy" : "columnar-key-group",
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  }, {
    "id" : 2138,
    "type" : "NativeCalcExecNode[1423]",
    "pact" : "Operator",
    "contents" : "[1423]:NativeCalc",
    "parallelism" : 4,
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  }, {
    "id" : 2141,
    "type" : "native-fluss-append-sink: Writer",
    "pact" : "Operator",
    "contents" : "native-fluss-append-sink: Writer",
    "parallelism" : 4,
    "predecessors" : [ {
      "id" : 2138,
      "ship_strategy" : "FORWARD",
      "side" : "second"
    } ]
  } ]
}