pan3793 commented on code in PR #59697:
URL: https://github.com/apache/spark/pull/59697#discussion_r4351123980
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docs/sql-ref-syntax-ddl-create-function.md:
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@@ -82,6 +82,8 @@ CREATE [ OR REPLACE ] [ TEMPORARY ] FUNCTION [ IF NOT EXISTS ]
Specifies the name of the class that provides the implementation for
function to be created.
The implementing class should extend one of the base classes as follows:
+ * Should implement `UnboundFunction` in
`org.apache.spark.sql.connector.catalog.functions`
+ package.
Review Comment:
@sunchao Added a note to the CREATE FUNCTION reference in 09f1c7b0dea, with
the `--jars` / `spark.jars` and `produceResult` alternatives. The public no-arg
constructor requirement is now stated for all class kinds, since Hive UDFs and
`UserDefinedAggregateFunction` need it too.
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