org.apache.flink.table.catalog

Interface FunctionLookup

@Internal
public interface FunctionLookup

Catalog of functions that can resolve the name of a function to a ContextResolvedFunction.

Method Summary

Modifier and Type	Method and Description
PlannerTypeInferenceUtil	getPlannerTypeInferenceUtil() Temporary utility until the new type inference is fully functional.
default ContextResolvedFunction	lookupBuiltInFunction(BuiltInFunctionDefinition definition) Helper method for looking up a built-in function.
Optional<ContextResolvedFunction>	lookupFunction(String stringIdentifier) Lookup a function by function identifier.
Optional<ContextResolvedFunction>	lookupFunction(UnresolvedIdentifier identifier) Lookup a function by function identifier.

Method Detail

lookupFunction

Optional<ContextResolvedFunction> lookupFunction(String stringIdentifier)

Lookup a function by function identifier. The identifier is parsed The lookup is case insensitive.

lookupFunction

Optional<ContextResolvedFunction> lookupFunction(UnresolvedIdentifier identifier)

Lookup a function by function identifier. The lookup is case insensitive.

lookupBuiltInFunction

default ContextResolvedFunction lookupBuiltInFunction(BuiltInFunctionDefinition definition)

Helper method for looking up a built-in function.

getPlannerTypeInferenceUtil

PlannerTypeInferenceUtil getPlannerTypeInferenceUtil()

Temporary utility until the new type inference is fully functional.