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Create Function Statement

CREATE [TEMPORARY|SYSTEM TEMPORARY SYSTEM] FUNCTION [IF NOT EXISTS] [catalog_name.db_name.]function_name AS identifier [LANGUAGE JVMJAVA|SCALA|PYTHON] [USING JAR|FILE|ARCHIVE ‘resource_path’ [, USING JAR|FILE|ARCHIVE ‘path’]*]; 

Drop Function Statement

DROP [TEMPORARY|TEMPORARY SYSTEM] FUNCTION [IF EXISTS] [catalog_name.][db_name.] function_name;

Alter Function Statement

ALTER [TEMPORARY| TEMPORARY SYSTEM] FUNCTION [IF EXISTS] [catalog_name.][db_name.] function_name RENAME TO new_name;

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CREATE  [TEMPORARY|TEMPORARY SYSTEM] FUNCTION [IF NOT EXISTS] [catalog_name.db_name.]function_name AS identifier [LANGUAGE JVMJAVA|SCALA|PYTHON]

Drop Function Statement

DROP [TEMPORARY|TEMPORARY SYSTEM] FUNCTION [IF EXISTS] [catalog_name.][db_name.] function_name;

Alter Function Statement

ALTER [TEMPORARY|TEMPORARY SYSTEM] FUNCTION [IF EXISTS] [catalog_name.][db_name.] function_name AS identifier [LANGUAGE JAVA|SCALA|PYTHON];

Show Function Statement

SHOW FUNCTIONS  [catalog_name.][db_name]


Basically, we will delivery create function and drop function that is already included in the classpath. For loading function from remote resources, it will be work after the Flink 1.10 release. The sub-tasks include.

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