== Abstract Syntax Tree ==
LogicalSink(table=[fluss.nexmark.output_2b7c956ae1984331bbfc25939f791511], 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=[2072])
+- NativeCalc(reuseBarrier=[2071])
   +- NativeColumnarSessionWindowAggregate(reuseBarrier=[2070])
      +- NativeColumnarExchange(reuseBarrier=[2069])
         +- NativeCalc(reuseBarrier=[2068])
            +- NativeFlussSource(table=[nexmark.events], reuseBarrier=[2067])

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

== Physical Execution Plan ==
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    "pact" : "Data Source",
    "contents" : "Source: native-fluss-source",
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    "type" : "NativeCalcExecNode[1692]",
    "pact" : "Operator",
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    "contents" : "[1694]:NativeColumnarSessionWindowAggregate",
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    "type" : "NativeCalcExecNode[1695]",
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  }, {
    "id" : 2413,
    "type" : "native-fluss-append-sink: Writer",
    "pact" : "Operator",
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