Fabian Hueske created FLINK-5905:
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Summary: Add user-defined aggregation functions to documentation.
Key: FLINK-5905
URL: https://issues.apache.org/jira/browse/FLINK-5905
Project: Flink
Issue Type: Sub-task
Components: Table API & SQL
Reporter: Fabian Hueske-- This message was sent by Atlassian JIRA (v6.3.15#6346)
