yuemeng created FLINK-7151:
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Summary: FLINK SQL support create temporary function and table
Key: FLINK-7151
URL: https://issues.apache.org/jira/browse/FLINK-7151
Project: Flink
Issue Type: New Feature
Reporter: yuemeng
Based on create temporary function and table.we can register a udf,udaf,udtf
use sql:
{code}
CREATE TEMPORARY 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}
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