union-onschema projects null schema at parsing stage for some queries
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Key: PIG-1694
URL: https://issues.apache.org/jira/browse/PIG-1694
Project: Pig
Issue Type: Bug
Affects Versions: 0.8.0
Reporter: Thejas M Nair
Assignee: Thejas M Nair
Fix For: 0.8.0
If the input relations of union-onschema have different aliases in the schemas,
a subsequent statement that refers to a column alias in the union fails.
eg
{code}
grunt> l1 = load 'x' as (a);
grunt> l2 = load 'x' as (a,b);
grunt> u = union onschema l1,l2;
grunt> o = order u by a;
2010-10-22 14:33:56,086 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR
1000: Error during parsing. Invalid alias: a in null
Details at logfile: /Users/tejas/pig-0.8/branch-0.8/pig_1287783217811.log
{code}
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