Su, Xiaomeng 04d4597cf3 dli_sqlreference_0511_version

Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com>
Co-authored-by: Su, Xiaomeng <suxiaomeng1@huawei.com>
Co-committed-by: Su, Xiaomeng <suxiaomeng1@huawei.com>

2023-11-02 14:34:08 +00:00

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CREATE FUNCTION

Syntax

CREATE FUNCTION
  [IF NOT EXISTS] function_name
  AS identifier [LANGUAGE JAVA|SCALA]

Function

Create a user-defined function.

Description

IF NOT EXISTS

If the function already exists, nothing happens.

LANGUAGE JAVA|SCALA

Language tag is used to instruct Flink runtime how to execute the function. Currently only JAVA and SCALA are supported, the default language for a function is JAVA.

Example

Create a function named STRINGBACK.

create function STRINGBACK as 'com.dli.StringBack'

Parent topic: Data Definition Language (DDL)

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