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https://issues.apache.org/jira/browse/FLINK-13547?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhenghua Gao updated FLINK-13547:
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Description:
Currently many string builtin functions in blink planner follow hive/spark
semantics, which should keep compatible with old planner. And some non-standard
functions(Blink planner intros) should be removed.
* concat/concat_ws function (null treatment)
* substr/substring function (follow calcite/flink)
* from_base64 should return string not binary
* intro truncate function to blink planner
* uuid should be no-argument (remove the one-argument version)
* length/jsonvalue/keyvalue (non-standard function should be removed)
* md5/sha1/sha2/sha224/sha256/sha384/sha512(remove the two-arguments version)
* ascii (operand type should beSqlTypeFamily.CHARACTER)
> Verify and correct string function's semantic for Blink planner
> ---------------------------------------------------------------
>
> Key: FLINK-13547
> URL: https://issues.apache.org/jira/browse/FLINK-13547
> Project: Flink
> Issue Type: Sub-task
> Components: Table SQL / Planner
> Affects Versions: 1.9.0, 1.10.0
> Reporter: Zhenghua Gao
> Assignee: Zhenghua Gao
> Priority: Critical
> Fix For: 1.9.0, 1.10.0
>
>
> Currently many string builtin functions in blink planner follow hive/spark
> semantics, which should keep compatible with old planner. And some
> non-standard functions(Blink planner intros) should be removed.
> * concat/concat_ws function (null treatment)
> * substr/substring function (follow calcite/flink)
> * from_base64 should return string not binary
> * intro truncate function to blink planner
> * uuid should be no-argument (remove the one-argument version)
> * length/jsonvalue/keyvalue (non-standard function should be removed)
> * md5/sha1/sha2/sha224/sha256/sha384/sha512(remove the two-arguments version)
> * ascii (operand type should beSqlTypeFamily.CHARACTER)
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