== Abstract Syntax Tree ==
LogicalSink(table=[fluss.nexmark.output_07200e095b3a4bc8a77f4ff286567a8d], 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=[1682])
+- NativeCalc(reuseBarrier=[1681])
   +- NativeColumnarSessionWindowAggregate(reuseBarrier=[1680])
      +- NativeColumnarExchange(reuseBarrier=[1679])
         +- NativeCalc(reuseBarrier=[1678])
            +- NativeFlussSource(table=[nexmark.events], reuseBarrier=[1677])

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

== Physical Execution Plan ==
{
  "nodes" : [ {
    "id" : 2031,
    "type" : "Source: native-fluss-source",
    "pact" : "Data Source",
    "contents" : "Source: native-fluss-source",
    "parallelism" : 4
  }, {
    "id" : 2032,
    "type" : "NativeCalcExecNode[1358]",
    "pact" : "Operator",
    "contents" : "[1358]:NativeCalc",
    "parallelism" : 4,
    "predecessors" : [ {
      "id" : 2031,
      "ship_strategy" : "FORWARD",
      "side" : "second"
    } ]
  }, {
    "id" : 2033,
    "type" : "NativeColumnarExchangeExecNode[1359]",
    "pact" : "Operator",
    "contents" : "[1359]:NativeColumnarExchange",
    "parallelism" : 4,
    "predecessors" : [ {
      "id" : 2032,
      "ship_strategy" : "FORWARD",
      "side" : "second"
    } ]
  }, {
    "id" : 2035,
    "type" : "NativeColumnarSessionWindowAggExecNode[1360]",
    "pact" : "Operator",
    "contents" : "[1360]:NativeColumnarSessionWindowAggregate",
    "parallelism" : 4,
    "predecessors" : [ {
      "id" : 2033,
      "ship_strategy" : "columnar-key-group",
      "side" : "second"
    } ]
  }, {
    "id" : 2036,
    "type" : "NativeCalcExecNode[1361]",
    "pact" : "Operator",
    "contents" : "[1361]:NativeCalc",
    "parallelism" : 4,
    "predecessors" : [ {
      "id" : 2035,
      "ship_strategy" : "FORWARD",
      "side" : "second"
    } ]
  }, {
    "id" : 2039,
    "type" : "native-fluss-append-sink: Writer",
    "pact" : "Operator",
    "contents" : "native-fluss-append-sink: Writer",
    "parallelism" : 4,
    "predecessors" : [ {
      "id" : 2036,
      "ship_strategy" : "FORWARD",
      "side" : "second"
    } ]
  } ]
}