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Get the function with the specified name. This function can be a temporary function or a function. This throws an AnalysisException when the function cannot be found.
Syntax
getFunction(functionName: str)
Parameters
| Parameter | Type | Description |
|---|---|---|
functionName |
str | Name of the function to get. |
Returns
Function
The function found by the name.
Examples
_ = spark.sql(
"CREATE FUNCTION my_func1 AS 'test.org.apache.spark.sql.MyDoubleAvg'")
spark.catalog.getFunction("my_func1")
# Function(name='my_func1', catalog='spark_catalog', namespace=['default'], ...
# Using the fully qualified name for function name.
spark.catalog.getFunction("default.my_func1")
# Function(name='my_func1', catalog='spark_catalog', namespace=['default'], ...
spark.catalog.getFunction("spark_catalog.default.my_func1")
# Function(name='my_func1', catalog='spark_catalog', namespace=['default'], ...
# Throw an analysis exception when the function does not exist.
spark.catalog.getFunction("my_func2")
# Traceback (most recent call last):
# ...
# AnalysisException: ...