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https://issues.apache.org/jira/browse/FLINK-7151?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16926800#comment-16926800
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Bowen Li commented on FLINK-7151:
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Hi [~ZhenqiuHuang] [~fhueske], as mentioned above, I'd prefer to split the
effort, and **have this ticket just deal with basic syntax like the examples
given in the description**, and they are much less controversial. We can assume
that the function class is already in classpath by users.
Advanced syntax like "USING JAR/FILE/ARCHIVE" will need its own FLIP to discuss
questions like those raised by Fabian.
Do you think we need a mini FLIP for just the basic syntax? [~fhueske]
> Add a function SQL DDL
> ----------------------
>
> Key: FLINK-7151
> URL: https://issues.apache.org/jira/browse/FLINK-7151
> Project: Flink
> Issue Type: Sub-task
> Components: Table SQL / API
> Reporter: yuemeng
> Assignee: Shuyi Chen
> Priority: Critical
> Fix For: 1.10.0
>
>
> Based on create function and table.we can register a udf,udaf,udtf use sql:
> {code}
> CREATE FUNCTION [IF NOT EXISTS] [catalog_name.db_name.]function_name AS
> class_name [WITH (properties.....)];
> DROP FUNCTION [IF EXISTS] [catalog_name.db_name.]function_name;
> ALTER FUNCTION [IF EXISTS] [catalog_name.db_name.]function_name RENAME TO
> new_name;
> {code}
> {code}
> CREATE function 'TOPK' AS
> 'com.xxxx.aggregate.udaf.distinctUdaf.topk.ITopKUDAF';
> INSERT INTO db_sink SELECT id, TOPK(price, 5, 'DESC') FROM kafka_source GROUP
> BY id;
> {code}
> This ticket can assume that the function class is already loaded in classpath
> by users. Advanced syntax like to how to dynamically load udf libraries from
> external locations can be on a separate ticket.
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