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https://issues.apache.org/jira/browse/FLINK-5795?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15874245#comment-15874245
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ASF GitHub Bot commented on FLINK-5795:
---------------------------------------
Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/3330#discussion_r101974098
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/codegen/CodeGenerator.scala
---
@@ -1463,21 +1465,23 @@ class CodeGenerator(
*/
def addReusableFunction(function: UserDefinedFunction): String = {
val classQualifier = function.getClass.getCanonicalName
- val fieldTerm = s"function_${classQualifier.replace('.', '$')}"
+ val functionSerializedData = serialize(function)
+ val fieldTerm =
+ s"""
+ |function_${classQualifier.replace('.',
'$')}_${DigestUtils.md5Hex(functionSerializedData)}
--- End diff --
I agree with @sunjincheng121.
The naming collision with md5hex are actually intentional to deduplicate
identical functions This might happen because the same function is used more
than once or because the same function has been registered twice and both are
used. By using `CodeGen.newName` we would have the serialized code and
initialization as often as the same function is used.
> Improve “UDTF" to support constructor with parameter.
> -----------------------------------------------------
>
> Key: FLINK-5795
> URL: https://issues.apache.org/jira/browse/FLINK-5795
> Project: Flink
> Issue Type: Sub-task
> Components: Table API & SQL
> Reporter: sunjincheng
> Assignee: sunjincheng
>
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