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https://issues.apache.org/jira/browse/STORM-1200?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15022801#comment-15022801
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ASF GitHub Bot commented on STORM-1200:
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GitHub user haohui opened a pull request:
https://github.com/apache/storm/pull/901
STORM-1200. Support collations of primary keys.
This PR allows users to specify collations on primary keys so that the
query engines can use this as a hint when processing streaming aggregations.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/haohui/storm STORM-1200
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/storm/pull/901.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #901
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commit e0c00ffbf55faa977e66e8aaced7c93861329bfb
Author: Haohui Mai <[email protected]>
Date: 2015-11-11T22:23:14Z
STORM-1200. Support collations of primary keys.
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> Support collations of primary keys
> ----------------------------------
>
> Key: STORM-1200
> URL: https://issues.apache.org/jira/browse/STORM-1200
> Project: Apache Storm
> Issue Type: New Feature
> Components: storm-sql
> Reporter: Haohui Mai
> Assignee: Haohui Mai
>
> This jira proposes to add support of specifying collations of primary keys.
> Collations provide information on uniqueness and monotonicity of columns. The
> information is essential to implement aggregation functions over streaming
> data.
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