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https://issues.apache.org/jira/browse/PIG-2339?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13140398#comment-13140398
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Viraj Bhat commented on PIG-2339:
---------------------------------
Hi Daniel,
I quickly checked the debug logs of HCatalog and it works with Pig 0.8
{quote}
HCatTableInfo getInputTableInfo(filter=((grid = 'AB') and (dt = '2011_10_01'))
2011-10-31 18:04:15,821 [main] INFO hive.metastore - Trying to connect to
metastore with URI thrift://myserver.com:9080
2011-10-31 18:04:15,830 [main] INFO hive.metastore - Connected to metastore.
listPartitionsByFilter(default, paritionedtable, ((grid = 'AB') and (dt =
'2011_10_01'))) returns 1 partitions.
[hcat.metastore.maxpartitions] = [100000]
{quote}
This is an issue with only Pig 0.9 and beyond.
Viraj
> HCatLoader loads all the partitions in a partitioned table even though a
> filter clause on the partitions is specified in the Pig script
> ---------------------------------------------------------------------------------------------------------------------------------------
>
> Key: PIG-2339
> URL: https://issues.apache.org/jira/browse/PIG-2339
> Project: Pig
> Issue Type: Bug
> Affects Versions: 0.9.0
> Reporter: Viraj Bhat
> Assignee: Daniel Dai
> Fix For: 0.9.1
>
> Attachments: PIG-2339-1.patch
>
>
> A table created by HCAT has the following partitions;
> hcat -e "show partitions paritionedtable"
> {quote}
> grid=AB/dt=2011_07_01
> grid=AB/dt=2011_07_02
> grid=AB/dt=2011_07_03
> grid=XY/dt=2011_07_01
> grid=XY/dt=2011_07_02
> grid=XY/dt=2011_07_03
> grid=XY/dt=2011_07_04
> ...
> {quote}
> The total number of partitions in the table is around 3200.
> A Pig script of this nature tries to access this data using the partitions in
> it's filter.
> {script}
> A = LOAD 'paritionedtable' USING org.apache.hcatalog.pig.HCatLoader();
> B = FILTER A BY grid=='AB' AND dt=='2011_07_04';
> C = LIMIT B 10;
> store C into 'HCAT' using PigStorage();
> {script}
> This script, fails to run as the job.xml generated by Pig is so large (8MB),
> that the Hadoop Fred's limitation does not allow it to submit the job.
> After debugging it was found that in the HCatTableInfo class the function
> gets a null filter value. getInputTableInfo(filter=null ..)
> I suspect that "setPartitionFilter" function in Pig does not pass the filter
> correctly to the HCatLoader. This is happening with both Pig 0.9 and 0.8
> Viraj
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