Hello,
While looking into some of the tangential issues encountered while doing
the export/import related work, I have some questions:
1. Should "CREATE TABLE" lock (shared) the database? I think so from the
discussions, but I do not think it happens now.
2. Similarly "LOAD" should a
Hello,
I was looking into the RCFile format, esp when used with compression; a
picture of the file layout as I understand it in this case is attached.
Some queries/potential issues:
1. RCFile makes a claim of being sequence file compatible; but the
recordLength is not the actual on-d
emselves.
It is initially designed for Hive. Thread safety is there at first
time, and then removed because Hive does not need that, and
'synchronized' may need extra overhead
>>3.1
Reader.nextBlock() is later added for file merge. So the normal reader
should not use this method.
Any reason why persistent stores such as jdbc and hbase are supported for
temporary stats storage IIUC, but hadoop counters were not used for the tasks
to 'publish' their stats for the aggregation task to pick it up from?
Cheers,
Krishna
Reporter: Krishna Kumar
This is an enhancement request to add export/import features to hive.
With this language extension, the user can export the data of the table - which
may be located in different hdfs locations in case of a partitioned table - as
well as the metadata of the
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Krishna Kumar updated HIVE-1918:
Status: Patch Available (was: Open)
Patch for adding export/import.
> Add export/imp
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Krishna Kumar updated HIVE-1918:
Attachment: HIVE-1918.patch.txt
> Add export/import facilities to the hive sys
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Krishna Kumar commented on HIVE-1918:
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Design notes:
- Export/Import modele
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Krishna Kumar commented on HIVE-1918:
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Ok. Will take of this via a delegating ctor
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Krishna Kumar commented on HIVE-1918:
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Why export/import needs this change: It is
: Krishna Kumar
In validateInput, Reader constructors of SequenceFile and RCFile throw
exceptions to indicate that the format is incorrect, but the close is not
called in a finally block.
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Krishna Kumar updated HIVE-1924:
Status: Patch Available (was: Open)
Not sure how to test this automatically, since the readers are
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Krishna Kumar updated HIVE-1924:
Attachment: HIVE.1924.patch.txt
Tested only manually with hive.fileformat.check set to true
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Krishna Kumar commented on HIVE-1918:
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@Edward: Both the existing data m
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Krishna Kumar commented on HIVE-1918:
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@Carl:
1. Taken care in the new patch.
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Krishna Kumar updated HIVE-1918:
Attachment: HIVE-1918.patch.1.txt
A quick summary of the second derivative (difference between
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Krishna Kumar updated HIVE-1918:
Attachment: hive-metastore-er.pdf
Prettified ER diagram of the existing data model
> Add exp
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Krishna Kumar commented on HIVE-1918:
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@Namit:
1. Do you have any ideas re how we
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Krishna Kumar updated HIVE-1924:
Status: Open (was: Patch Available)
Hmm, The patch is not correct. Setting hive.checkformat=false
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Krishna Kumar resolved HIVE-1924.
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Resolution: Duplicate
Problem referenced in HADOOP-5476 and HIVE-1185
> checkfor
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Krishna Kumar updated HIVE-1918:
Attachment: HIVE-1918.patch.2.txt
Patch including
- no changes to ql.metadata.Partition as per
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Krishna Kumar commented on HIVE-1918:
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@Namit: Attached patch now uses relative p
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Krishna Kumar updated HIVE-1918:
Attachment: HIVE-1918.patch.3.txt
Patch with all open issues addressed
> Add export/imp
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Krishna Kumar updated HIVE-1918:
Status: Patch Available (was: Open)
> Add export/import facilities to the hive sys
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Krishna Kumar commented on HIVE-1918:
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With this patch, I think all above issues
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Krishna Kumar commented on HIVE-1918:
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Thanks, Namit, for the comments.
1. O
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Krishna Kumar commented on HIVE-1918:
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Importing into existing tables is now suppo
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Krishna Kumar commented on HIVE-1918:
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Hmm. LoadSemanticAnalyzer (which knows
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Krishna Kumar updated HIVE-1918:
Status: Patch Available (was: Open)
Please review. Will try and see if I can update the
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Krishna Kumar updated HIVE-1918:
Attachment: HIVE-1918.patch.4.txt
Patch with
- metadata ser/deser methods moved from HiveUtils to
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Krishna Kumar commented on HIVE-2417:
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Yes, the test is designed to produce the e
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Krishna Kumar updated HIVE-2417:
Attachment: HIVE-2417.v1.patch
Test changed after review comments
- default codec instead of bzip2
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Krishna Kumar updated HIVE-2413:
Attachment: HIVE-2413.v1.patch
Empty string not handled correctly in JC so handling it here
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Krishna Kumar commented on HIVE-1918:
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https://reviews.apache.org/r/430/ added (
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Krishna Kumar commented on HIVE-1918:
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There are a few reasons why I took
URL: https://issues.apache.org/jira/browse/HIVE-2003
Project: Hive
Issue Type: Bug
Components: Query Processor
Reporter: Krishna Kumar
Assignee: Krishna Kumar
Priority: Minor
The table/partition being loaded is not being added to
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Krishna Kumar updated HIVE-2003:
Attachment: HIVE-2003.patch.txt
Patch attached.
1. LoadSemanticAnalyzer adds the table/partition
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Krishna Kumar commented on HIVE-2003:
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6. Loading a partitioned table wit
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Krishna Kumar updated HIVE-2003:
Attachment: (was: HIVE-2003.patch.txt)
> LOAD compilation does not set the outputs dur
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Krishna Kumar updated HIVE-2003:
Attachment: HIVE-2003.patch.txt
One results file was diffed as binary so patch regenerated with
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Krishna Kumar commented on HIVE-1918:
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Thanks Paul.
[Your comments are
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Krishna Kumar updated HIVE-1918:
Attachment: HIVE-1918.patch.5.txt
- Nested ternaries expanded
- thrift-based serialization for
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Krishna Kumar updated HIVE-2003:
Status: Patch Available (was: Open)
> LOAD compilation does not set the outputs during seman
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Krishna Kumar updated HIVE-1918:
Attachment: HIVE-1918.patch.5.txt
Merged with trunk
> Add export/import facilities to the h
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Krishna Kumar updated HIVE-1918:
Attachment: (was: HIVE-1918.patch.5.txt)
> Add export/import facilities to the hive sys
RCFile issues
-
Key: HIVE-2065
URL: https://issues.apache.org/jira/browse/HIVE-2065
Project: Hive
Issue Type: Bug
Reporter: Krishna Kumar
Priority: Minor
Some potential issues with RCFile
1. Remove
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Krishna Kumar updated HIVE-2065:
Attachment: Slide1.png
Compressed RCFile Layout
> RCFile iss
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Krishna Kumar reassigned HIVE-2065:
---
Assignee: Krishna Kumar
> RCFile issues
> -
>
> Ke
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Krishna Kumar commented on HIVE-2065:
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So should I go ahead and fix #2 and #3 as
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Krishna Kumar updated HIVE-2065:
Attachment: proposal.png
Notation : Length bracket inside the dashed box means it is the
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Krishna Kumar updated HIVE-2003:
Attachment: HIVE-2003.patch.1.txt
Regenerated the patch.
> LOAD compilation does not set
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Krishna Kumar commented on HIVE-2003:
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Added to review board: h
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Krishna Kumar commented on HIVE-2003:
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For #4 above, I have taken now the
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Krishna Kumar updated HIVE-2003:
Status: Patch Available (was: Open)
Please review asap as there are lots of changes to q.out files
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Krishna Kumar commented on HIVE-2065:
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Hmm. #3 is taking me a bit too far th
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Krishna Kumar updated HIVE-2065:
Attachment: proposal.png
The layout as implemented in the attached patch
> RCFile iss
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Krishna Kumar updated HIVE-2065:
Attachment: (was: proposal.png)
> RCFile issues
> -
>
>
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Krishna Kumar updated HIVE-2065:
Attachment: HIVE.2065.patch.0.txt
Patch. Since it contains binary files, it was generated with
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Krishna Kumar commented on HIVE-2065:
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Review Board Entry at h
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Krishna Kumar commented on HIVE-2071:
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Namit,
While we can read the config vari
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Krishna Kumar updated HIVE-2065:
Status: Patch Available (was: Open)
> RCFile issues
> -
>
>
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Krishna Kumar commented on HIVE-2065:
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The RCFile layout seems to have been desi
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Krishna Kumar commented on HIVE-2065:
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As I indicated, the reason I made changes
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Krishna Kumar updated HIVE-2065:
Attachment: HIVE.2065.patch.1.txt
Updated patch where sequence file compliance is not addressed but
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Krishna Kumar commented on HIVE-2065:
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Updated patch where sequence file complianc
: Query Processor, Serializers/Deserializers
Reporter: Krishna Kumar
Priority: Minor
Optimization of the compression mechanisms used by RC File to be explored.
Some initial ideas
1. More efficient serialization/deserialization based on type-specific and
storage-specific
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Krishna Kumar reassigned HIVE-2097:
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Assignee: Krishna Kumar
> Explore mechanisms for better compression with RC Fi
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Krishna Kumar commented on HIVE-2097:
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Comment hijacked from HIVE-2065:
He Yongq
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Krishna Kumar updated HIVE-2071:
Attachment: HIVE.2071.patch.0.txt
Tentative patch to show the implementation for the sessionstate
Make couple of convenience methods in EximUtil public
-
Key: HIVE-2098
URL: https://issues.apache.org/jira/browse/HIVE-2098
Project: Hive
Issue Type: Bug
Reporter: Krishna
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Krishna Kumar reassigned HIVE-2098:
---
Assignee: Krishna Kumar
> Make couple of convenience methods in EximUtil pub
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Krishna Kumar updated HIVE-2098:
Attachment: HIVE.2098.patch.0.txt
Couple of methods made public for use outside of the package
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Krishna Kumar updated HIVE-2098:
Status: Patch Available (was: Open)
> Make couple of convenience methods in EximUtil pub
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Krishna Kumar commented on HIVE-2065:
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The minor version is needed so that we
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Krishna Kumar updated HIVE-956:
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Attachment: HIVE.956.patch.0
Initial patch for lazy binary columnar serde. Reuses elements of columnar
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Krishna Kumar commented on HIVE-956:
Initial patch for lazy binary columnar s
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Krishna Kumar commented on HIVE-956:
Review board: https://reviews.apache.org/r
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Krishna Kumar updated HIVE-956:
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Status: Patch Available (was: Open)
> Add support of columnar binary se
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Krishna Kumar updated HIVE-956:
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Attachment: HIVE.956.patch.1
Patch with a change on how null vs empty strings are handled. This patch
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Krishna Kumar commented on HIVE-956:
Re-ordering my responses;
bq.
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Krishna Kumar updated HIVE-956:
---
Attachment: HIVE.956.patch.2
Re-ordering my responses;
bq. can LazyBinaryColumnarSerDe share some
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Krishna Kumar commented on HIVE-956:
bq. can warnedOnceNullMapKey be removed?
I
URL: https://issues.apache.org/jira/browse/HIVE-2209
Project: Hive
Issue Type: Sub-task
Reporter: Krishna Kumar
Assignee: Krishna Kumar
Priority: Minor
Now ObjectInspectorUtils.compare throws an exception if a map is contained
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Krishna Kumar updated HIVE-2209:
Issue Type: Improvement (was: Sub-task)
Parent: (was: HIVE-956)
> Provide a way
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Krishna Kumar updated HIVE-2209:
Attachment: HIVE-2209v0.patch
Patch, with tests, added.
> Provide a way by wh
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Krishna Kumar updated HIVE-2209:
Status: Patch Available (was: Open)
For review by He Yongqiang
> Provide a way by wh
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Krishna Kumar commented on HIVE-2209:
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He Yongqiang,
Can you take a look at this
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Krishna Kumar updated HIVE-2209:
Attachment: HIVE2209v1.patch
Added another implementation with sorting of the keys
> Provide a
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Krishna Kumar updated HIVE-2209:
Attachment: HIVE-2209v2.patch
Fixed a lowercase/uppercase typo in the test classes
> Provide a
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https://issues.apache.org/jira/browse/HIVE-956?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Krishna Kumar updated HIVE-956:
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Attachment: HIVE-956v3.patch
After separating mapcomparer changes to its own jira/patch - HIVE-2209
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Krishna Kumar updated HIVE-956:
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Status: Patch Available (was: Open)
I have tested the setting of rawDataSize with a "ANALYZE
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Krishna Kumar updated HIVE-956:
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Attachment: HIVE-956v4.patch
Please note that HIVE-2209 is a pre-requisite for this patch.
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Krishna Kumar commented on HIVE-956:
Common code moved to a base class to
Project: Hive
Issue Type: Bug
Components: Query Processor
Reporter: Krishna Kumar
when we import multiple partitions from an exported partitioned table, if we
import it with a specified external location, then the partitions end up
overwriting.
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https://issues.apache.org/jira/browse/HIVE-2384?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Krishna Kumar updated HIVE-2384:
Assignee: Krishna Kumar
Status: Patch Available (was: Open)
> import of multiple partiti
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https://issues.apache.org/jira/browse/HIVE-2384?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Krishna Kumar updated HIVE-2384:
Attachment: HIVE-2384.v0.patch
Patch with tests
> import of multiple partitions from a partitio
Reporter: Krishna Kumar
Priority: Minor
User-specified jars are not added to the hadoop tasks while executing a
BlockMergeTask resulting in a ClassNotFoundException.
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https://issues.apache.org/jira/browse/HIVE-2413?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Krishna Kumar updated HIVE-2413:
Attachment: HIVE-2413.v0.patch
Here is a simple fix which works for me, though there may be better
Type: Bug
Components: Query Processor
Reporter: Krishna Kumar
Assignee: Krishna Kumar
Attachments: HIVE-2417.v0.patch
The blockmerge task does not create proper rc files when merging compressed rc
files as the valuebuffer writing is incorrect.
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https://issues.apache.org/jira/browse/HIVE-2417?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Krishna Kumar updated HIVE-2417:
Attachment: HIVE-2417.v0.patch
Test added
> Merging of compressed rcfiles fails to write
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