org.apache.flink.table.catalog

Interface FunctionLookup

All Known Implementing Classes:

FunctionCatalog

@Internal
public interface FunctionLookup

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

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	FunctionLookup.Result Result of a function lookup.

Method Summary

Modifier and Type	Method and Description
PlannerTypeInferenceUtil	getPlannerTypeInferenceUtil() Temporary utility until the new type inference is fully functional.
default FunctionLookup.Result	lookupBuiltInFunction(org.apache.flink.table.functions.BuiltInFunctionDefinition definition) Helper method for looking up a built-in function.
Optional<FunctionLookup.Result>	lookupFunction(org.apache.flink.table.catalog.UnresolvedIdentifier identifier) Lookup a function by function identifier.

Method Detail

lookupFunction

Optional<FunctionLookup.Result> lookupFunction(org.apache.flink.table.catalog.UnresolvedIdentifier identifier)

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

lookupBuiltInFunction

default FunctionLookup.Result lookupBuiltInFunction(org.apache.flink.table.functions.BuiltInFunctionDefinition definition)

Helper method for looking up a built-in function.

getPlannerTypeInferenceUtil

PlannerTypeInferenceUtil getPlannerTypeInferenceUtil()

Temporary utility until the new type inference is fully functional.