[ https://issues.apache.org/jira/browse/FLINK-5792?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15869488#comment-15869488 ]
sunjincheng commented on FLINK-5792: ------------------------------------ BYW, when I implement the issue, I had try to use `kryo` serialize&deserialize the UDTF/UDF object, It will make byte [] very small. But unfortunately, It asked the serialized member must have a zero-parameter constructor which not friendly to user. > Improve “UDF/UDTF" to support constructor with parameter. > --------------------------------------------------------- > > Key: FLINK-5792 > URL: https://issues.apache.org/jira/browse/FLINK-5792 > Project: Flink > Issue Type: Improvement > Components: Table API & SQL > Reporter: sunjincheng > Assignee: sunjincheng > > Currently UDF/UDTF in the codegen phase using a nonparametric constructor to > create the instance, causing the user can not include the state value in the > UDF/UDTF. The UDF/UDTF's codegen phase can use a serialized mechanism so that > the UDTF can contain state values. > 1. UserDefinedFunction inherits Serializable. > 2. Modify CodeGenerator about UDF/UDTF part. > 3. Modify TableAPI about UDF/UDTF > 4. Add Test. -- This message was sent by Atlassian JIRA (v6.3.15#6346)