pabloem commented on a change in pull request #12427:
URL: https://github.com/apache/beam/pull/12427#discussion_r465923575



##########
File path: sdks/python/apache_beam/testing/benchmarks/nexmark/queries/query2.py
##########
@@ -29,17 +29,15 @@
 from __future__ import absolute_import
 
 import apache_beam as beam
-from apache_beam.testing.benchmarks.nexmark.models import nexmark_model
-from apache_beam.testing.benchmarks.nexmark.nexmark_util import ParseEventFn
-from apache_beam.testing.benchmarks.nexmark.nexmark_util import display
+from apache_beam.testing.benchmarks.nexmark.models import auction_price
+from apache_beam.testing.benchmarks.nexmark.queries import nexmark_query_util
 
 
-def load(raw_events, metadata=None):
+def load(events, metadata=None):

Review comment:
       Perhaps it's not that important, but it looks like these events are 
already parsed (hence the name `events` instead of `raw_events`. Should you 
rename the pcollection in query 1 and query 0?

##########
File path: sdks/python/apache_beam/testing/benchmarks/nexmark/nexmark_util.py
##########
@@ -103,6 +121,107 @@ def process(self, elem):
     yield event
 
 
+class ParseJsonEvnetFn(beam.DoFn):
+  """Parses the raw event info into a Python objects.
+
+  Each event line has the following format:
+
+    person: {id,name,email,credit_card,city, \
+                          state,timestamp,extra}
+    auction: {id,item_name, description,initial_bid, \
+                          
reserve_price,timestamp,expires,seller,category,extra}
+    bid: {auction,bidder,price,timestamp,extra}
+
+  For example:
+
+    {"id":1000,"name":"Peter Jones","emailAddress":"n...@xcat.com",\
+        "creditCard":"7241 7320 9143 4888","city":"Portland","state":"WY",\

Review comment:
       can you improve the formatting of these docs?

##########
File path: sdks/python/apache_beam/testing/benchmarks/nexmark/queries/query2.py
##########
@@ -29,17 +29,15 @@
 from __future__ import absolute_import
 
 import apache_beam as beam
-from apache_beam.testing.benchmarks.nexmark.models import nexmark_model
-from apache_beam.testing.benchmarks.nexmark.nexmark_util import ParseEventFn
-from apache_beam.testing.benchmarks.nexmark.nexmark_util import display
+from apache_beam.testing.benchmarks.nexmark.models import auction_price
+from apache_beam.testing.benchmarks.nexmark.queries import nexmark_query_util
 
 
-def load(raw_events, metadata=None):
+def load(events, metadata=None):
   return (
-      raw_events
-      | 'ParseEventFn' >> beam.ParDo(ParseEventFn())
-      | 'FilterInAuctionsWithSelectedId' >> beam.Filter(
-          lambda event: (
-              isinstance(event, nexmark_model.Auction) and event.id == 
metadata.
-              get('auction_id')))
-      | 'DisplayQuery2' >> beam.Map(display))  # pylint: 
disable=expression-not-assigned
+      events
+      | nexmark_query_util.JustBids()

Review comment:
       The documentation for q2 says `Select auctions by auction id.` - but I 
see you're selecting Bids, and then filtering them by Auction. Should the 
documentation be updated or should you be selecting Auctions and filtering 
those?

##########
File path: sdks/python/apache_beam/testing/benchmarks/nexmark/queries/query1.py
##########
@@ -29,20 +29,16 @@
 
 import apache_beam as beam
 from apache_beam.testing.benchmarks.nexmark.models import nexmark_model
-from apache_beam.testing.benchmarks.nexmark.nexmark_util import ParseEventFn
-from apache_beam.testing.benchmarks.nexmark.nexmark_util import display
+from apache_beam.testing.benchmarks.nexmark.queries import nexmark_query_util
 
 
 def load(raw_events, query_args=None):
   return (
       raw_events
-      | 'ParseEventFn' >> beam.ParDo(ParseEventFn())
-      | 'FilterInBids' >>
-      beam.Filter(lambda event: isinstance(event, nexmark_model.Bid))
+      | nexmark_query_util.JustBids()
       | 'ConvertToEuro' >> beam.Map(
           lambda bid: nexmark_model.Bid(
               bid.auction,
-              bid.bidder, (float(bid.price) * 89) // 100,
-              bid.timestamp,
-              bid.extra))
-      | 'DisplayQuery1' >> beam.Map(display))  # pylint: 
disable=expression-not-assigned
+              bid.bidder, (bid.price * 89) // 100,

Review comment:
       Perhaps create constants for 89 and 100? `EURO_RATE = 0.89` or something 
like that?

##########
File path: sdks/python/apache_beam/testing/benchmarks/nexmark/queries/query9.py
##########
@@ -0,0 +1,29 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+

Review comment:
       Please document query9 at the top




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