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https://issues.apache.org/jira/browse/HIVE-2188?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13045121#comment-13045121
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[email protected] commented on HIVE-2188:
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bq. On 2011-06-03 14:04:02, Ashutosh Chauhan wrote:
bq. > trunk/metastore/if/hive_metastore.thrift, line 249
bq. > <https://reviews.apache.org/r/831/diff/1/?file=20144#file20144line249>
bq. >
bq. > How about calling it get_multi_table instead? multi_get_table sounds
little confusing to me.
Ok, get_multi_table definitely sounds better.
bq. On 2011-06-03 14:04:02, Ashutosh Chauhan wrote:
bq. >
trunk/metastore/src/java/org/apache/hadoop/hive/metastore/HiveMetaStore.java,
line 521
bq. > <https://reviews.apache.org/r/831/diff/1/?file=20145#file20145line521>
bq. >
bq. > You can write this more concisely using commons-lang utility method
as: StringUtils.join(tbls,',');
Thanks for the tip; I changed this.
bq. On 2011-06-03 14:04:02, Ashutosh Chauhan wrote:
bq. >
trunk/metastore/src/java/org/apache/hadoop/hive/metastore/HiveMetaStore.java,
line 1182
bq. > <https://reviews.apache.org/r/831/diff/1/?file=20145#file20145line1182>
bq. >
bq. > You can get rid of tables.get(i) == null check that will never be
true.
I cleaned up the checks for seeing if the db had all the requested tables.
Also, I realized that I did not guarantee returning tables in the same order as
those requested, so I fixed that up too.
bq. On 2011-06-03 14:04:02, Ashutosh Chauhan wrote:
bq. >
trunk/metastore/src/java/org/apache/hadoop/hive/metastore/HiveMetaStore.java,
line 1195
bq. > <https://reviews.apache.org/r/831/diff/1/?file=20145#file20145line1195>
bq. >
bq. > Instead of throwing RuntimeException, create MetaException and throw
that.
I changed it to throw a MetaException instead. However, the other metastore
operations (e.g., get_table, append_partition) throw RuntimException, which is
what I based get_multi_table off.
bq. On 2011-06-03 14:04:02, Ashutosh Chauhan wrote:
bq. >
trunk/service/src/test/org/apache/hadoop/hive/service/TestHiveServer.java, line
221
bq. > <https://reviews.apache.org/r/831/diff/1/?file=20148#file20148line221>
bq. >
bq. > This test really belongs in the TestMetastore or some such in
metastore dir not in HiveServer.
Thanks for the pointer and for the feedback.
- Sohan
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https://reviews.apache.org/r/831/#review753
-----------------------------------------------------------
On 2011-06-06 21:09:54, Sohan Jain wrote:
bq.
bq. -----------------------------------------------------------
bq. This is an automatically generated e-mail. To reply, visit:
bq. https://reviews.apache.org/r/831/
bq. -----------------------------------------------------------
bq.
bq. (Updated 2011-06-06 21:09:54)
bq.
bq.
bq. Review request for hive, Paul Yang and Ashutosh Chauhan.
bq.
bq.
bq. Summary
bq. -------
bq.
bq. Created a function "multi_get_table" that retrieves multiple tables on one
trip to the hive metastore, saving round trip time.
bq.
bq.
bq. This addresses bug HIVE-2188.
bq. https://issues.apache.org/jira/browse/HIVE-2188
bq.
bq.
bq. Diffs
bq. -----
bq.
bq. trunk/metastore/if/hive_metastore.thrift 1130342
bq.
trunk/metastore/src/java/org/apache/hadoop/hive/metastore/HiveMetaStore.java
1130342
bq.
trunk/metastore/src/java/org/apache/hadoop/hive/metastore/ObjectStore.java
1130342
bq. trunk/metastore/src/java/org/apache/hadoop/hive/metastore/RawStore.java
1130342
bq.
trunk/metastore/src/test/org/apache/hadoop/hive/metastore/TestHiveMetaStore.java
1130342
bq.
bq. Diff: https://reviews.apache.org/r/831/diff
bq.
bq.
bq. Testing
bq. -------
bq.
bq. Added a test case to testMetasore() in TestHiveServer. Also tested for
speed improvements in a client session.
bq.
bq.
bq. Thanks,
bq.
bq. Sohan
bq.
bq.
> Add multi_get_table function in Hive Metastore
> ----------------------------------------------
>
> Key: HIVE-2188
> URL: https://issues.apache.org/jira/browse/HIVE-2188
> Project: Hive
> Issue Type: New Feature
> Components: Metastore
> Reporter: Sohan Jain
> Assignee: Sohan Jain
> Priority: Minor
> Attachments: HIVE-2188.1.patch
>
>
> This function would get multiple tables from the hive metastore as opposed to
> just one at a time, saving round trip time to the metastore.
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