HyukjinKwon commented on a change in pull request #33481:
URL: https://github.com/apache/spark/pull/33481#discussion_r675280937
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File path: python/pyspark/sql/catalog.py
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@@ -132,6 +132,30 @@ def listFunctions(self, dbName=None):
isTemporary=jfunction.isTemporary()))
return functions
+ def functionExists(self, functionName, dbName=None):
+ """Check if the function with the specified name exists.
+ This can either be a temporary function or a function.
+
+ .. versionadded:: 3.3.0
+
+ Parameters
+ ----------
+ functionName : str
+ name of the function to check existence
+ dbName : str, optional
+ name of the database to check function existence in.
+ If no database is specified, the current database is used
+
+ Returns
+ -------
+ bool
+ Indicating whether the function exists
+
Review comment:
@dominikgehl since we're here, could we add some simple examples here as
well?
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