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https://issues.apache.org/jira/browse/IGNITE-2177?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15073473#comment-15073473
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Sergi Vladykin commented on IGNITE-2177:
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1. In the query user will have to use local alias of the aggregate function,
when we will split the query into map-reduce parts, we will use map and reduce
aliases respectively.
2. You are right, probably we don't need method init.
> User defined aggregate functions for SQL
> ----------------------------------------
>
> Key: IGNITE-2177
> URL: https://issues.apache.org/jira/browse/IGNITE-2177
> Project: Ignite
> Issue Type: Wish
> Reporter: Sergi Vladykin
> Fix For: 1.6
>
>
> Need to design some factory like abstraction for creating map part and reduce
> part of the aggregate.
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