Bowen Li created FLINK-15593:
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Summary: add doc to remind users not using Hive aggregate
functions in streaming mode
Key: FLINK-15593
URL: https://issues.apache.org/jira/browse/FLINK-15593
Project: Flink
Issue Type: Task
Components: Documentation
Reporter: Bowen Li
Assignee: Bowen Li
Fix For: 1.10.0
Note that Hive scalar and table functions implementing UDF, GenericUDF, and
GenericUDTF interfaces should be good to run in both
streaming and batch mode in Flink.
Due to that Hive functions are all built for batch processing, aggregate
functions in Hive that implement UDAF and GenericUDAFResolver2
interfaces may have unpredictable behaviors when used in streaming mode in
Flink. We advice users to only use Hive aggregate functions
interfaces in batch mode.
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