Pig 0.9 error message not useful as compared to 0.8 in case of group by
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Key: PIG-2288
URL: https://issues.apache.org/jira/browse/PIG-2288
Project: Pig
Issue Type: Improvement
Affects Versions: 0.9.0
Reporter: Vivek Padmanabhan
Another instance of change in error message from 0.8 to 0.9.This time in group
by statement. In 0.8 the error message is proper while 0.9 returns NullPointer
A = LOAD 'i1' as (f1:chararray,f2:chararray);
B = GROUP B by f1;
C = foreach B generate group as f1, COUNT(A);
dump C;
Error message from 0.8
ERROR org.apache.pig.tools.grunt.Grunt - ERROR 1000: Error during parsing.
Unrecognized alias B
Error message from 0.9
org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1000: Error during
parsing. null
at org.apache.pig.PigServer$Graph.parseQuery(PigServer.java:1652)
at org.apache.pig.PigServer$Graph.registerQuery(PigServer.java:1597)
at org.apache.pig.PigServer.registerQuery(PigServer.java:583)
at
org.apache.pig.tools.grunt.GruntParser.processPig(GruntParser.java:942)
at
org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:386)
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)
Caused by: Failed to parse: null
at
org.apache.pig.parser.QueryParserDriver.parse(QueryParserDriver.java:180)
at org.apache.pig.PigServer$Graph.parseQuery(PigServer.java:1644)
... 9 more
Caused by: java.lang.NullPointerException
at
org.apache.pig.parser.LogicalPlanGenerator.alias_col_ref(LogicalPlanGenerator.java:12990)
at
org.apache.pig.parser.LogicalPlanGenerator.col_ref(LogicalPlanGenerator.java:12854)
at
org.apache.pig.parser.LogicalPlanGenerator.projectable_expr(LogicalPlanGenerator.java:7789)
at
org.apache.pig.parser.LogicalPlanGenerator.var_expr(LogicalPlanGenerator.java:7549)
at
org.apache.pig.parser.LogicalPlanGenerator.expr(LogicalPlanGenerator.java:6959)
at
org.apache.pig.parser.LogicalPlanGenerator.join_group_by_expr(LogicalPlanGenerator.java:10580)
at
org.apache.pig.parser.LogicalPlanGenerator.join_group_by_clause(LogicalPlanGenerator.java:10416)
at
org.apache.pig.parser.LogicalPlanGenerator.group_item(LogicalPlanGenerator.java:4727)
at
org.apache.pig.parser.LogicalPlanGenerator.group_clause(LogicalPlanGenerator.java:4345)
at
org.apache.pig.parser.LogicalPlanGenerator.op_clause(LogicalPlanGenerator.java:1020)
at
org.apache.pig.parser.LogicalPlanGenerator.general_statement(LogicalPlanGenerator.java:638)
at
org.apache.pig.parser.LogicalPlanGenerator.statement(LogicalPlanGenerator.java:459)
at
org.apache.pig.parser.LogicalPlanGenerator.query(LogicalPlanGenerator.java:357)
at
org.apache.pig.parser.QueryParserDriver.parse(QueryParserDriver.java:171)
... 10 more
Checked this case with latest code in trunk and patch from PIG-2238, the
message is still improper.
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