[PIG-2181] Improvement : for error message when describe misses alias

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.9.0
• Fix Version/s: 0.10.0
• Labels: newbie
• Hadoop Flags: Reviewed
• Assignee: Vivek Padmanabhan
• Reporter: Vivek Padmanabhan
• Created: 20/Jul/11 11:35
• Updated: 26/Apr/12 20:33
• Resolved: 05/Aug/11 17:21

Description

In Pig 0.9, if I have a describe without an alias, it throws a NullPointerException like below.

ERROR 2999: Unexpected internal error. null

java.lang.NullPointerException
at org.apache.pig.tools.grunt.GruntParser.processDescribe(GruntParser.java:270)
at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:317)
at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:188)
at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:164)
at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:81)
at org.apache.pig.Main.run(Main.java:553)
at org.apache.pig.Main.main(Main.java:108)

For example;
describe;

This message is of no use from a users perspective. Especially when my script becomes large and I have added couple of describe statements.