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Check if the function with the specified name exists. This can either be a temporary function or a function.
Syntax
functionExists(functionName: str, dbName: str = None)
Parameters
| Parameter | Type | Description |
|---|---|---|
functionName |
str | Name of the function to check existence. Can be qualified with catalog name. |
dbName |
str, optional | Name of the database to check function existence in. |
Returns
bool
Indicating whether the function exists.
Notes
If no database is specified, the current database and catalog are used. This API includes all temporary functions.
Examples
spark.catalog.functionExists("count")
# True
# Using the fully qualified name for function name.
spark.catalog.functionExists("default.unexisting_function")
# False
spark.catalog.functionExists("spark_catalog.default.unexisting_function")
# False