FunctionRegistryBase¶

FunctionRegistryBase[T] is an abstraction of function registries for registering functions (that produce results of type T).

Contract¶

Registering Named Function¶

registerFunction(
  name: FunctionIdentifier,
  info: ExpressionInfo,
  builder: Seq[Expression] => T): Unit

Used when:

• SessionCatalog is requested to register a catalog function and reset
• SparkSessionExtensions is requested to registerFunctions and registerTableFunctions

Implementations¶

• EmptyFunctionRegistryBase
• FunctionRegistry
• SimpleFunctionRegistryBase
• TableFunctionRegistry

createOrReplaceTempFunction¶

createOrReplaceTempFunction(
  name: String,
  builder: FunctionBuilder,
  source: String): Unit

createOrReplaceTempFunction registers a named function with a FunctionIdentifier for the given name.