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https://issues.apache.org/jira/browse/PIG-2316?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Koji Noguchi updated PIG-2316:
------------------------------
Priority: Critical (was: Minor)
Our user gave us a more realistic testcase.
Looks serious.
{noformat}
-bash-3.2$ cat weird.txt
1,a
1,c
2,b
3,c
-bash-3.2$ cat test2.pig
A = LOAD 'weird.txt' using PigStorage(',') AS (col1:int,col2);
B = FILTER A BY ((col1==1 AND col2=='c') OR (col1 != 1));
DUMP B;
-bash-3.2$ pig -x local test2.pig
(2,b)
(3,c)
-bash-3.2$
-bash-3.2$ pig -x local -optimizer_off ALL test2.pig
(1,c)
(2,b)
(3,c)
-bash-3.2$
{noformat}
> Incorrect results for FILTER *** BY ( *** OR ***) with
> FilterLogicExpressionSimplifier optimizer turned on
> ----------------------------------------------------------------------------------------------------------
>
> Key: PIG-2316
> URL: https://issues.apache.org/jira/browse/PIG-2316
> Project: Pig
> Issue Type: Bug
> Affects Versions: 0.8.0, 0.8.1, 0.9.0, 0.9.1
> Reporter: Huanyu Zhao
> Priority: Critical
>
> An example for this bug:
> cat weird.txt
> 1,a
> 2,b
> 3,c
> When running pig with the following statements:
> A = LOAD 'weird.txt' using PigStorage(',') AS (col1:int,col2);
> B = FILTER A BY ((col1==1) OR (col1 != 1));
> DUMP B;
> I expect to get the result of all three rows back, but I receive only two
> rows.
> (2,b)
> (3,c)
> When we start pig with optimizer turning off.
> pig -optimizer_off All
> With optimizer turning off, we get the expected results and I get three rows
> for the same statements.
> (1,a)
> (2,b)
> (3,c)
> --------------------------------------------------------
> This bug was test on:
> pig-0.9.1,
> pig-0.9.0,
> pig-0.8.1,
> pig-0.8.0
> All produced same incorrect results.
> --------------------------------------------------------
> When looked at the logical plan for this example, we found
> FilterlogicExpressionSimplifier optimizer produced incorrect logical plan. So
> we guess the bug is caused by FilterlogicExpressionSimplifier optimizer.
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