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GaoLun commented on FLINK-3971: ------------------------------- [~fhueske] If no one work on this issue, i would have a try. > Aggregates handle null values incorrectly. > ------------------------------------------ > > Key: FLINK-3971 > URL: https://issues.apache.org/jira/browse/FLINK-3971 > Project: Flink > Issue Type: Bug > Components: Table API > Affects Versions: 1.1.0 > Reporter: Fabian Hueske > Priority: Critical > Fix For: 1.1.0 > > > Table API and SQL aggregates are supposed to ignore null values, e.g., > {{sum(1,2,null,4)}} is supposed to return {{7}}. > There current implementation is correct if at least one valid value is > present however, is incorrect if only null values are aggregated. {{sum(null, > null, null)}} should return {{null}} instead of {{0}} > Currently only the Count aggregate handles the case of null-values-only > correctly. -- This message was sent by Atlassian JIRA (v6.3.4#6332)