TableFunctionRegistry¶

TableFunctionRegistry is an extension of the FunctionRegistryBase abstraction for function registries that register functions that produce a LogicalPlan.

Implementations¶

• EmptyTableFunctionRegistry
• SimpleTableFunctionRegistry

Creating SimpleTableFunctionRegistry¶

builtin: SimpleTableFunctionRegistry

builtin creates a new SimpleTableFunctionRegistry and registers all the built-in function expressions.

builtin is used when:

• TableFunctionRegistry utility is used for functionSet
• SessionCatalog is requested to isTemporaryFunction and reset
• BaseSessionStateBuilder is requested for a TableFunctionRegistry

Accessing TableFunctionRegistry¶

TableFunctionRegistry is available using BaseSessionStateBuilder.tableFunctionRegistry.

SessionCatalog¶

TableFunctionRegistry is used to create the following:

• SessionCatalog
• HiveSessionCatalog
• SessionState