Yin Huai created SPARK-9297:
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Summary: covar_pop and covar_samp aggregate functions
Key: SPARK-9297
URL: https://issues.apache.org/jira/browse/SPARK-9297
Project: Spark
Issue Type: Sub-task
Components: SQL
Reporter: Yin Huai
A short introduction on how to build aggregate functions based on our new
interface can be found at
https://issues.apache.org/jira/browse/SPARK-4366?focusedCommentId=14639921&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14639921.
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