Yaguang Jia created KYLIN-5694:
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Summary: Concat function supports 0 or 1 parameter
Key: KYLIN-5694
URL: https://issues.apache.org/jira/browse/KYLIN-5694
Project: Kylin
Issue Type: Bug
Components: Query Engine
Affects Versions: 5.0-alpha
Reporter: Yaguang Jia
Assignee: Yaguang Jia
Fix For: 5.0-beta
h2. Design
Kylin5 currently does not support UDFs with only one parameter. However, Spark
and Hive do support it. Additionally, it has been verified that Spark and Hive
also support concat with zero parameters. Here, we are adding support for
Kylin5 to handle both zero and one parameter cases.
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Kylin5当前自定义的 udf 不支持一个参数的。但是 spark 和 hive 支持。同时还验证了一下 spark 和 hive 还支持 concat
为0 个参数的情况。这里对增加Kylin5对0个和1个参数的支持。
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