If you store immediately after the CROSS, it works. If you do another FOREACH/GENERATE, etc. it does not.
On Wed, Dec 4, 2013 at 1:41 PM, Pradeep Gollakota <[email protected]>wrote: > I tried to following script (not exactly the same) and it worked correctly > for me. > > businesses = LOAD 'dataset' using PigStorage(',') AS (a, b, c, > business_id: chararray, lat: double, lng: double); > locations = FOREACH businesses GENERATE business_id, lat, lng; > STORE locations INTO 'locations.tsv'; > locations2 = LOAD 'locations.tsv' AS (business_id, lat, long); > loc_com = CROSS locations2, locations; > dump loc_com; > > I’m wondering your problem has something to do with the way that the > JsonStorage works. Another thing you can try is to load ‘locations.tsv’ > twice and do a self-cross on that. > > > On Wed, Dec 4, 2013 at 1:21 PM, Russell Jurney <[email protected] > >wrote: > > > I have this bug that is killing me, where I can't self-join/cross a > dataset > > with itself. Its blocking my work :( > > > > The script is like this: > > > > businesses = LOAD > > 'yelp_phoenix_academic_dataset/yelp_academic_dataset_business.json' using > > com.twitter.elephantbird.pig.load.JsonLoader() as json:map[]; > > > > /* {open=true, neighborhoods={}, review_count=14, stars=4.0, name=Drybar, > > business_id=LcAamvosJu0bcPgEVF-9sQ, state=AZ, full_address=3172 E > Camelback > > Rd > > Phoenix, AZ85018, categories={(Hair Salons),(Hair Stylists),(Beauty & > > Spas)}, longitude=-112.0131927, latitude=33.5107772, type=business, > > city=Phoenix} */ > > locations = FOREACH businesses GENERATE $0#'business_id' AS business_id, > > $0#'longitude' AS longitude, > > $0#'latitude' AS latitude; > > STORE locations INTO 'yelp_phoenix_academic_dataset/locations.tsv'; > > locations_2 = LOAD 'yelp_phoenix_academic_dataset/locations.tsv' AS > > (business_id:chararray, longitude:double, latitude:double); > > location_comparisons = CROSS locations_2, locations; > > > > distances = FOREACH businesses GENERATE locations.business_id AS > > business_id_1, > > locations_2.business_id AS > > business_id_2, > > > udfs.haversine(locations.longitude, > > > locations.latitude, > > > > locations_2.longitude, > > > > locations_2.latitude) AS distance; > > STORE distances INTO 'yelp_phoenix_academic_dataset/distances.tsv'; > > > > > > I have also tried converting this to a self-join using JOIN BY '1', and > > also locations_2 = locations, and I get the same error: > > > > *org.apache.pig.backend.executionengine.ExecException: ERROR 0: Scalar > has > > more than one row in the output. 1st : > > (rncjoVoEFUJGCUoC1JgnUA,-112.241596,33.581867), 2nd > > :(0FNFSzCFP_rGUoJx8W7tJg,-112.105933,33.604054)* > > > > at org.apache.pig.impl.builtin.ReadScalars.exec(ReadScalars.java:111) > > > > at > > > > > org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POUserFunc.getNext(POUserFunc.java:336) > > > > at > > > > > org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POUserFunc.getNext(POUserFunc.java:438) > > > > at > > > > > org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator.getNext(PhysicalOperator.java:347) > > > > at > > > > > org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.processPlan(POForEach.java:378) > > > > at > > > > > org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.getNext(POForEach.java:298) > > > > at > > > > > org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.runPipeline(PigGenericMapBase.java:283) > > > > at > > > > > org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.map(PigGenericMapBase.java:278) > > > > at > > > > > org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.map(PigGenericMapBase.java:64) > > > > at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144) > > > > at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:764) > > > > at org.apache.hadoop.mapred.MapTask.run(MapTask.java:370) > > > > at > org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:212) > > > > This makes no sense! What am I to do? I can't self-join :( > > -- > > Russell Jurney twitter.com/rjurney [email protected] > > datasyndrome.com > > > -- Russell Jurney twitter.com/rjurney [email protected] datasyndrome.com
