Logical operator should contains individual copy of schema object
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Key: PIG-1127
URL: https://issues.apache.org/jira/browse/PIG-1127
Project: Pig
Issue Type: Bug
Affects Versions: 0.4.0
Reporter: Daniel Dai
Assignee: Daniel Dai
Fix For: 0.6.0
Currently some logical operator only contains a schema reference to the
predecessor's schema object. These logical operators include: LOSplitOutput,
LOLimit, LOSplit, LOFilter, LOSort, LODistinct, LOUnion. It is ok in the before
because we do not change schema object once it is set. Now with the column
pruner (PIG-922), we need to change individual schema object so it is no longer
acceptable. For example, the following script fail:
{code}
a = load '1.txt' as (a0, a1:map[], a2);
b = foreach a generate a1;
c = limit b 10;
dump c;
{code}
We need to fix it.
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