Hi,
I'm trying to use regular expressions in PIG, but it's failing. Based on the
documentation http://pig.apache.org/docs/r0.12.0/func.html#regex-extract I am
trying this:
[watrous@c0003913 ~]$ pig -x local
which: no hadoop in
(/opt/krb5/sbin/64:/usr/lib64/qt-3.3/bin:/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/sbin:/usr/X11R6/bin:/sbin:/usr/sbin:/usr/bin:/opt/pb/bin:/opt/perf/bin:/bin:/usr/local/bin:/home/watrous/bin:/home/watrous/pig-0.12.0/bin)
2013-12-04 17:15:15,398 [main] INFO org.apache.pig.Main - Apache Pig version
0.12.0 (r1529718) compiled Oct 07 2013, 12:20:14
2013-12-04 17:15:15,398 [main] INFO org.apache.pig.Main - Logging error
messages to: /home/watrous/pig_1386177315394.log
2013-12-04 17:15:15,425 [main] INFO org.apache.pig.impl.util.Utils - Default
bootup file /home/watrous/.pigbootup not found
2013-12-04 17:15:15,599 [main] INFO
org.apache.pig.backend.hadoop.executionengine.HExecutionEngine - Connecting to
hadoop file system at: file:///
grunt> REGEX_EXTRACT('192.168.1.5:8020', '(.*):(.*)', 1);
2013-12-04 17:16:59,753 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR
1200: <line 1> Cannot expand macro 'REGEX_EXTRACT'. Reason: Macro must be
defined before expansion.
Details at logfile: /home/watrous/pig_1386177315394.log
Here's the relevant bit from the log file:
Pig Stack Trace
---------------
ERROR 1200: <line 1> Cannot expand macro 'REGEX_EXTRACT'. Reason: Macro must be
defined before expansion.
Failed to parse: <line 1> Cannot expand macro 'REGEX_EXTRACT'. Reason: Macro
must be defined before expansion.
at org.apache.pig.parser.PigMacro.macroInline(PigMacro.java:455)
at
org.apache.pig.parser.QueryParserDriver.inlineMacro(QueryParserDriver.java:298)
at
org.apache.pig.parser.QueryParserDriver.expandMacro(QueryParserDriver.java:287)
at
org.apache.pig.parser.QueryParserDriver.parse(QueryParserDriver.java:180)
at org.apache.pig.PigServer$Graph.validateQuery(PigServer.java:1648)
at org.apache.pig.PigServer$Graph.registerQuery(PigServer.java:1621)
at org.apache.pig.PigServer.registerQuery(PigServer.java:575)
at
org.apache.pig.tools.grunt.GruntParser.processPig(GruntParser.java:1093)
at
org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:501)
at
org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:198)
at
org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:173)
at org.apache.pig.tools.grunt.Grunt.run(Grunt.java:69)
at org.apache.pig.Main.run(Main.java:541)
at org.apache.pig.Main.main(Main.java:156)
I attempted to define the macro (following this tutorial
http://aws.amazon.com/articles/2729). However, piggybank.jar doesn't define
org.apache.pig.piggybank.evaluation.string.EXTRACT, so I located the most
likely file in the current version of the jar.
grunt> register /home/watrous/pig-0.12.0/contrib/piggybank/java/piggybank.jar
grunt> DEFINE REGEX_EXTRACT
org.apache.pig.piggybank.evaluation.string.RegexExtract;
grunt> REGEX_EXTRACT('192.168.1.5:8020', '(.*):(.*)', 1);
2013-12-04 17:23:20,383 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR
1200: <line 3> Cannot expand macro 'REGEX_EXTRACT'. Reason: Macro must be
defined before expansion.
Details at logfile: /home/watrous/pig_1386177315394.log
I get the same stack trace with the only change being a reference to <line 3>
instead of <line 1>.
Any idea how I can get this working?
Daniel
