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https://issues.apache.org/jira/browse/CASSANDRA-4459?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13420909#comment-13420909
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Jonathan Ellis commented on CASSANDRA-4459:
-------------------------------------------
casting IntegerType to pig's [32bit] int sounds broken to me. shouldn't we fix
the population script to use int32 as well?
> pig driver casts ints as bytearray
> ----------------------------------
>
> Key: CASSANDRA-4459
> URL: https://issues.apache.org/jira/browse/CASSANDRA-4459
> Project: Cassandra
> Issue Type: Bug
> Environment: C* 1.1.2 embedded in DSE
> Reporter: Cathy Daw
> Assignee: Brandon Williams
> Fix For: 1.1.3
>
> Attachments: 4459.txt
>
>
> we seem to be auto-mapping C* int columns to bytearray in Pig, and farther
> down I can't seem to find a way to cast that to int and do an average.
> {code}
> grunt> cassandra_users = LOAD 'cassandra://cqldb/users' USING
> CassandraStorage();
> grunt> dump cassandra_users;
> (bobhatter,(act,22),(fname,bob),(gender,m),(highSchool,Cal
> High),(lname,hatter),(sat,500),(state,CA),{})
> (alicesmith,(act,27),(fname,alice),(gender,f),(highSchool,Tuscon
> High),(lname,smith),(sat,650),(state,AZ),{})
>
> // notice sat and act columns are bytearray values
> grunt> describe cassandra_users;
> cassandra_users: {key: chararray,act: (name: chararray,value:
> bytearray),fname: (name: chararray,value: chararray),
> gender: (name: chararray,value: chararray),highSchool: (name:
> chararray,value: chararray),lname: (name: chararray,value: chararray),
> sat: (name: chararray,value: bytearray),state: (name: chararray,value:
> chararray),columns: {(name: chararray,value: chararray)}}
> grunt> users_by_state = GROUP cassandra_users BY state;
> grunt> dump users_by_state;
> ((state,AX),{(aoakley,(highSchool,Phoenix
> High),(lname,Oakley),state,(act,22),(sat,500),(gender,m),(fname,Anne),{})})
> ((state,AZ),{(gjames,(highSchool,Tuscon
> High),(lname,James),state,(act,24),(sat,650),(gender,f),(fname,Geronomo),{})})
> ((state,CA),{(philton,(highSchool,Beverly
> High),(lname,Hilton),state,(act,37),(sat,220),(gender,m),(fname,Paris),{}),(jbrown,(highSchool,Cal
> High),(lname,Brown),state,(act,20),(sat,700),(gender,m),(fname,Jerry),{})})
> // Error - use explicit cast
> grunt> user_avg = FOREACH users_by_state GENERATE cassandra_users.state,
> AVG(cassandra_users.sat);
> grunt> dump user_avg;
> 2012-07-22 17:15:04,361 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR
> 1045: Could not infer the matching function for org.apache.pig.builtin.AVG as
> multiple or none of them fit. Please use an explicit cast.
> // Unable to cast as int
> grunt> user_avg = FOREACH users_by_state GENERATE cassandra_users.state,
> AVG((int)cassandra_users.sat);
> grunt> dump user_avg;
> 2012-07-22 17:07:39,217 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR
> 1052: Cannot cast bag with schema sat: bag({name: chararray,value:
> bytearray}) to int
> {code}
> *Seed data in CQL*
> {code}
> CREATE KEYSPACE cqldb with
> strategy_class = 'org.apache.cassandra.locator.SimpleStrategy'
> and strategy_options:replication_factor=3;
> use cqldb;
> CREATE COLUMNFAMILY users (
> KEY text PRIMARY KEY,
> fname text, lname text, gender varchar,
> act int, sat int, highSchool text, state varchar);
> insert into users (KEY, fname, lname, gender, act, sat, highSchool, state)
> values (gjames, Geronomo, James, f, 24, 650, 'Tuscon High', 'AZ');
> insert into users (KEY, fname, lname, gender, act, sat, highSchool, state)
> values (aoakley, Anne, Oakley, m , 22, 500, 'Phoenix High', 'AX');
> insert into users (KEY, fname, lname, gender, act, sat, highSchool, state)
> values (jbrown, Jerry, Brown, m , 20, 700, 'Cal High', 'CA');
> insert into users (KEY, fname, lname, gender, act, sat, highSchool, state)
> values (philton, Paris, Hilton, m , 37, 220, 'Beverly High', 'CA');
> select * from users;
> {code}
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