== Abstract Syntax Tree ==
LogicalSink(table=[fluss.nexmark.output_0e4387f7b457417ea006515a4f7442fb], fields=[auction, bidder, price, channel, channel_id])
+- LogicalProject(auction=[$0], bidder=[$1], price=[$2], channel=[$3], channel_id=[CASE(=(LOWER($3), _UTF-16LE'apple'), _UTF-16LE'0':VARCHAR(2147483647) CHARACTER SET "UTF-16LE", =(LOWER($3), _UTF-16LE'google'), _UTF-16LE'1':VARCHAR(2147483647) CHARACTER SET "UTF-16LE", =(LOWER($3), _UTF-16LE'facebook'), _UTF-16LE'2':VARCHAR(2147483647) CHARACTER SET "UTF-16LE", =(LOWER($3), _UTF-16LE'baidu'), _UTF-16LE'3':VARCHAR(2147483647) CHARACTER SET "UTF-16LE", REGEXP_EXTRACT($4, _UTF-16LE'(&|^)channel_id=([^&]*)', 2))])
   +- LogicalFilter(condition=[OR(IS NOT NULL(REGEXP_EXTRACT($4, _UTF-16LE'(&|^)channel_id=([^&]*)', 2)), =(LOWER($3), _UTF-16LE'apple'), =(LOWER($3), _UTF-16LE'google'), =(LOWER($3), _UTF-16LE'facebook'), =(LOWER($3), _UTF-16LE'baidu'))])
      +- 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 ==
Sink(table=[fluss.nexmark.output_0e4387f7b457417ea006515a4f7442fb], fields=[auction, bidder, price, channel, channel_id])
+- Calc(select=[bid.auction AS auction, bid.bidder AS bidder, bid.price AS price, bid.channel AS channel, CASE(=(LOWER(bid.channel), _UTF-16LE'apple':VARCHAR(2147483647) CHARACTER SET "UTF-16LE"), _UTF-16LE'0':VARCHAR(2147483647) CHARACTER SET "UTF-16LE", =(LOWER(bid.channel), _UTF-16LE'google':VARCHAR(2147483647) CHARACTER SET "UTF-16LE"), _UTF-16LE'1':VARCHAR(2147483647) CHARACTER SET "UTF-16LE", =(LOWER(bid.channel), _UTF-16LE'facebook':VARCHAR(2147483647) CHARACTER SET "UTF-16LE"), _UTF-16LE'2':VARCHAR(2147483647) CHARACTER SET "UTF-16LE", =(LOWER(bid.channel), _UTF-16LE'baidu':VARCHAR(2147483647) CHARACTER SET "UTF-16LE"), _UTF-16LE'3':VARCHAR(2147483647) CHARACTER SET "UTF-16LE", REGEXP_EXTRACT(bid.url, _UTF-16LE'(&|^)channel_id=([^&]*)', 2)) AS channel_id], where=[AND(=(event_type, 2), OR(IS NOT NULL(REGEXP_EXTRACT(bid.url, _UTF-16LE'(&|^)channel_id=([^&]*)', 2)), =(LOWER(bid.channel), _UTF-16LE'apple':VARCHAR(8) CHARACTER SET "UTF-16LE"), =(LOWER(bid.channel), _UTF-16LE'baidu':VARCHAR(8) CHARACTER SET "UTF-16LE"), =(LOWER(bid.channel), _UTF-16LE'facebook':VARCHAR(8) CHARACTER SET "UTF-16LE"), =(LOWER(bid.channel), _UTF-16LE'google':VARCHAR(8) CHARACTER SET "UTF-16LE")))])
   +- TableSourceScan(table=[[fluss, nexmark, events, project=[event_type, bid, dateTime], watermark=[-(TO_TIMESTAMP_LTZ(dateTime, 3), 4000:INTERVAL SECOND)], watermarkEmitStrategy=[on-periodic], filter=[]]], fields=[event_type, bid, dateTime])

== Optimized Execution Plan ==
Sink(table=[fluss.nexmark.output_0e4387f7b457417ea006515a4f7442fb], fields=[auction, bidder, price, channel, channel_id])
+- Calc(select=[bid.auction AS auction, bid.bidder AS bidder, bid.price AS price, bid.channel AS channel, CASE((LOWER(bid.channel) = 'apple'), '0', (LOWER(bid.channel) = 'google'), '1', (LOWER(bid.channel) = 'facebook'), '2', (LOWER(bid.channel) = 'baidu'), '3', REGEXP_EXTRACT(bid.url, '(&|^)channel_id=([^&]*)', 2)) AS channel_id], where=[((event_type = 2) AND (REGEXP_EXTRACT(bid.url, '(&|^)channel_id=([^&]*)', 2) IS NOT NULL OR (LOWER(bid.channel) = 'apple') OR (LOWER(bid.channel) = 'baidu') OR (LOWER(bid.channel) = 'facebook') OR (LOWER(bid.channel) = 'google')))])
   +- TableSourceScan(table=[[fluss, nexmark, events, project=[event_type, bid, dateTime], watermark=[-(TO_TIMESTAMP_LTZ(dateTime, 3), 4000:INTERVAL SECOND)], watermarkEmitStrategy=[on-periodic], filter=[]]], fields=[event_type, bid, dateTime])

== Physical Execution Plan ==
{
  "nodes" : [ {
    "id" : 4017,
    "type" : "Source: events[2573]",
    "pact" : "Data Source",
    "contents" : "[2573]:TableSourceScan(table=[[fluss, nexmark, events, project=[event_type, bid, dateTime], watermark=[-(TO_TIMESTAMP_LTZ(dateTime, 3), 4000:INTERVAL SECOND)], watermarkEmitStrategy=[on-periodic], filter=[]]], fields=[event_type, bid, dateTime])",
    "parallelism" : 4
  }, {
    "id" : 4018,
    "type" : "Calc[2574]",
    "pact" : "Operator",
    "contents" : "[2574]:Calc(select=[bid.auction AS auction, bid.bidder AS bidder, bid.price AS price, bid.channel AS channel, CASE((LOWER(bid.channel) = 'apple'), '0', (LOWER(bid.channel) = 'google'), '1', (LOWER(bid.channel) = 'facebook'), '2', (LOWER(bid.channel) = 'baidu'), '3', REGEXP_EXTRACT(bid.url, '(&|^)channel_id=([^&]*)', 2)) AS channel_id], where=[((event_type = 2) AND (REGEXP_EXTRACT(bid.url, '(&|^)channel_id=([^&]*)', 2) IS NOT NULL OR (LOWER(bid.channel) = 'apple') OR (LOWER(bid.channel) = 'baidu') OR (LOWER(bid.channel) = 'facebook') OR (LOWER(bid.channel) = 'google')))])",
    "parallelism" : 4,
    "predecessors" : [ {
      "id" : 4017,
      "ship_strategy" : "FORWARD",
      "side" : "second"
    } ]
  }, {
    "id" : 4020,
    "type" : "Sink(nexmark.output_0e4387f7b457417ea006515a4f7442fb): Writer",
    "pact" : "Operator",
    "contents" : "Sink(nexmark.output_0e4387f7b457417ea006515a4f7442fb): Writer",
    "parallelism" : 4,
    "predecessors" : [ {
      "id" : 4018,
      "ship_strategy" : "FORWARD",
      "side" : "second"
    } ]
  } ]
}