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https://issues.apache.org/jira/browse/HIVE-16113?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15896457#comment-15896457
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Gopal V commented on HIVE-16113:
--------------------------------
{code}
2017-03-05T12:37:46,379 WARN [6f053d71-6ad6-4ad0-833d-337f2d499c82 main]
ppr.PartitionPruner: The expr = dt
2017-03-05T12:37:46,379 WARN [6f053d71-6ad6-4ad0-833d-337f2d499c82 main]
ppr.PartitionPruner: The expr = '2001-01-01'
2017-03-05T12:37:46,379 WARN [6f053d71-6ad6-4ad0-833d-337f2d499c82 main]
ppr.PartitionPruner: The expr = (dt = '2001-01-01')
2017-03-05T12:37:46,380 WARN [6f053d71-6ad6-4ad0-833d-337f2d499c82 main]
ppr.PartitionPruner: The expr = 1
2017-03-05T12:37:46,380 WARN [6f053d71-6ad6-4ad0-833d-337f2d499c82 main]
ppr.PartitionPruner: The expr = (null = 1)
2017-03-05T12:37:46,380 WARN [6f053d71-6ad6-4ad0-833d-337f2d499c82 main]
ppr.PartitionPruner: The expr = ((dt = '2001-01-01') and (null = 1))
2017-03-05T12:37:46,380 WARN [6f053d71-6ad6-4ad0-833d-337f2d499c82 main]
ppr.PartitionPruner: The expr = false
2017-03-05T12:37:46,380 WARN [6f053d71-6ad6-4ad0-833d-337f2d499c82 main]
ppr.PartitionPruner: The expr = NVL(((dt = '2001-01-01') and (null = 1)),false)
2017-03-05T12:37:47,153 WARN [6f053d71-6ad6-4ad0-833d-337f2d499c82 main]
ppr.PartitionPruner: The expr = dt
2017-03-05T12:37:47,153 WARN [6f053d71-6ad6-4ad0-833d-337f2d499c82 main]
ppr.PartitionPruner: The expr = '2001-01-01'
2017-03-05T12:37:47,153 WARN [6f053d71-6ad6-4ad0-833d-337f2d499c82 main]
ppr.PartitionPruner: The expr = (dt = '2001-01-01')
2017-03-05T12:37:47,153 WARN [6f053d71-6ad6-4ad0-833d-337f2d499c82 main]
ppr.PartitionPruner: The expr = null
2017-03-05T12:37:47,153 WARN [6f053d71-6ad6-4ad0-833d-337f2d499c82 main]
ppr.PartitionPruner: The expr = ((dt = '2001-01-01') and null)
2017-03-05T12:37:47,153 WARN [6f053d71-6ad6-4ad0-833d-337f2d499c82 main]
ppr.PartitionPruner: The expr = false
2017-03-05T12:37:47,153 WARN [6f053d71-6ad6-4ad0-833d-337f2d499c82 main]
ppr.PartitionPruner: The expr = NVL(((dt = '2001-01-01') and null),false)
{code}
> PartitionPruner::removeNonPartCols breaks NULL based udfs like NVL
> ------------------------------------------------------------------
>
> Key: HIVE-16113
> URL: https://issues.apache.org/jira/browse/HIVE-16113
> Project: Hive
> Issue Type: Bug
> Components: Logical Optimizer
> Affects Versions: 1.2.1, 2.2.0, 2.1.1
> Reporter: Gopal V
>
> {code}
> create table daysales (customer int) partitioned by (dt string);
> insert into daysales partition(dt='2001-01-01') values(1);
> select * from daysales where nvl(dt='2001-01-01' and customer=1, false);
> 0 ROWS
> {code}
> https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/optimizer/ppr/PartitionPruner.java#L384
> {code}
> 2017-03-05T12:37:47,153 WARN [6f053d71-6ad6-4ad0-833d-337f2d499c82 main]
> ppr.PartitionPruner: The expr = NVL(((dt = '2001-01-01') and null),false)
> {code}
> Because {{true and null => null}}, this turns into {{NVL(null, false)}}
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