PythonUDF Expression¶

PythonUDF is an Expression that is unevaluable and a NonSQLExpression.

PythonUDF is a UserDefinedExpression expression.

Creating Instance¶

PythonUDF takes the following to be created:

• Name
• PythonFunction
• DataType
• Children Expressions
• Eval Type
• udfDeterministic flag
• Result ExprId

PythonUDF is created when:

• SparkConnectPlanner is requested to transformPythonUDF
• UserDefinedPythonFunction is requested to builder

evalType¶

PythonUDF is given an eval type when created.

nodePatterns¶

nodePatterns: Seq[TreePattern]

nodePatterns is PYTHON_UDF.

nullable¶

nullable: Boolean

nullable is always true.