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https://issues.apache.org/jira/browse/PIG-1195?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daniel Dai updated PIG-1195:
----------------------------
Description:
POSort always use ascending order. We shall obey the sort order as specified in
the script.
For example, the following script does not do the right thing if we turn off
secondary sort (which means, we will rely on POSort to sort):
{code}
A = load 'input' as (a0:int);
B = group A ALL;
C = foreach B {
D = order A by a0 desc;
generate D;
};
dump C;
{code}
If we run it using the command line "java -Xmx512m
-Dpig.exec.nosecondarykey=true -jar pig.jar 1.pig".
The sort order for D is ascending.
was:
InternalSortedBag always use ascending order. We shall obey the sort order as
specified in the script.
For example, the following script does not do the right thing if we turn off
secondary sort (which means, we will rely on InternalSortedBag to sort):
{code}
A = load 'input' as (a0:int);
B = group A ALL;
C = foreach B {
D = order A by a0 desc;
generate D;
};
dump C;
{code}
If we run it using the command line "java -Xmx512m
-Dpig.exec.nosecondarykey=true -jar pig.jar 1.pig".
The sort order for D is ascending.
Summary: POSort should take care of sort order (was: InternalSortedBag
should take care of sort order)
> POSort should take care of sort order
> -------------------------------------
>
> Key: PIG-1195
> URL: https://issues.apache.org/jira/browse/PIG-1195
> Project: Pig
> Issue Type: Bug
> Components: impl
> Affects Versions: 0.6.0
> Reporter: Daniel Dai
> Fix For: 0.6.0
>
> Attachments: PIG-1195-1.patch, PIG-1195-2.patch
>
>
> POSort always use ascending order. We shall obey the sort order as specified
> in the script.
> For example, the following script does not do the right thing if we turn off
> secondary sort (which means, we will rely on POSort to sort):
> {code}
> A = load 'input' as (a0:int);
> B = group A ALL;
> C = foreach B {
> D = order A by a0 desc;
> generate D;
> };
> dump C;
> {code}
> If we run it using the command line "java -Xmx512m
> -Dpig.exec.nosecondarykey=true -jar pig.jar 1.pig".
> The sort order for D is ascending.
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