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https://issues.apache.org/jira/browse/PIG-2303?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13115014#comment-13115014
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Graham Lea commented on PIG-2303:
---------------------------------
>From the log file:
{noformat}
Pig Stack Trace
---------------
ERROR 1022: Type mismatch merging schema prefix. Field Schema: double. Other
Field Schema: firstMonth: chararray
org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1000: Error during
parsing. Type mismatch merging schema prefix. Field Schema: double. Other Field
Schema: firstMonth: chararray
at org.apache.pig.PigServer$Graph.parseQuery(PigServer.java:1618)
at org.apache.pig.PigServer$Graph.registerQuery(PigServer.java:1562)
at org.apache.pig.PigServer.registerQuery(PigServer.java:534)
at
org.apache.pig.tools.grunt.GruntParser.processPig(GruntParser.java:871)
at
org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:388)
at
org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:168)
at
org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:144)
at org.apache.pig.tools.grunt.Grunt.run(Grunt.java:76)
at org.apache.pig.Main.run(Main.java:455)
at org.apache.pig.Main.main(Main.java:107)
Caused by: org.apache.pig.impl.logicalLayer.parser.ParseException: Problems in
merging user defined schema
at
org.apache.pig.impl.logicalLayer.parser.QueryParser.Parse(QueryParser.java:853)
at
org.apache.pig.impl.logicalLayer.LogicalPlanBuilder.parse(LogicalPlanBuilder.java:63)
at org.apache.pig.PigServer$Graph.parseQuery(PigServer.java:1612)
... 9 more
Caused by: org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1016:
Problems in merging user defined schema
at
org.apache.pig.impl.logicalLayer.LOForEach.getSchema(LOForEach.java:337)
at
org.apache.pig.impl.logicalLayer.parser.QueryParser.Parse(QueryParser.java:851)
... 11 more
Caused by: org.apache.pig.impl.logicalLayer.schema.SchemaMergeException: ERROR
1022: Type mismatch merging schema prefix. Field Schema: double. Other Field
Schema: firstMonth: chararray
at
org.apache.pig.impl.logicalLayer.schema.Schema$FieldSchema.mergePrefixFieldSchema(Schema.java:550)
at
org.apache.pig.impl.logicalLayer.schema.Schema$FieldSchema.mergePrefixFieldSchema(Schema.java:474)
at
org.apache.pig.impl.logicalLayer.LOForEach.getSchema(LOForEach.java:332)
... 12 more
================================================================================
{noformat}
> Documentation says the MAX function can be used on chararray, but it can't
> --------------------------------------------------------------------------
>
> Key: PIG-2303
> URL: https://issues.apache.org/jira/browse/PIG-2303
> Project: Pig
> Issue Type: Bug
> Components: documentation
> Reporter: Graham Lea
> Priority: Trivial
> Labels: documentation
>
> Here: http://pig.apache.org/docs/r0.9.0/func.html#max
> It says MIN/Max can be used on chararray, but the result of those functions
> is always a double.
> Had to search through the Pig Javadoc to find that I should use
> StringMin/StringMax instead.
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