Chengxiang Li created FLINK-3139:
------------------------------------
Summary: NULL values handling in Table API
Key: FLINK-3139
URL: https://issues.apache.org/jira/browse/FLINK-3139
Project: Flink
Issue Type: Task
Components: Table API
Reporter: Chengxiang Li
This is an umbrella task for NULL value handling in Table API.
As the logical API for queries, Table API should support handling NULL values,
NULL value is quite a common case during logical query, for example:
# Data source may miss column value in many cases("value missing", "value
unknown", "value not applicable" .etc ).
# Some operators generate Null values on their own, like Outer
Join/Cube/Rollup/Grouping Set, and so on. Null values handling in Table API is
the prerequisite of these features.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
