org.apache.calcite.sql.type

Class MatchReturnTypeInference

java.lang.Object

org.apache.calcite.sql.type.MatchReturnTypeInference

All Implemented Interfaces:

SqlReturnTypeInference

public class MatchReturnTypeInference
extends Object
implements SqlReturnTypeInference

Returns the first type that matches a set of given SqlTypeNames. If no match could be found, null is returned.

Constructor Summary

Constructors

Constructor and Description
MatchReturnTypeInference(int start, List<SqlTypeName> typeNames) Returns the first type matching any type in typeNames at or after position start (zero based).
MatchReturnTypeInference(int start, SqlTypeName... typeNames) Returns the first type of typeName at or after position start (zero based).

Method Summary

Methods

Modifier and Type	Method and Description
RelDataType	inferReturnType(SqlOperatorBinding opBinding) Infers the return type of a call to an SqlOperator.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MatchReturnTypeInference

public MatchReturnTypeInference(int start,
                        SqlTypeName... typeNames)

Returns the first type of typeName at or after position start (zero based).

See Also:

MatchReturnTypeInference(int, SqlTypeName[])

MatchReturnTypeInference

public MatchReturnTypeInference(int start,
                        List<SqlTypeName> typeNames)

Returns the first type matching any type in typeNames at or after position start (zero based).

Method Detail

inferReturnType

public RelDataType inferReturnType(SqlOperatorBinding opBinding)

Description copied from interface: SqlReturnTypeInference

Infers the return type of a call to an SqlOperator.

Specified by:

inferReturnType in interface SqlReturnTypeInference

Parameters:

opBinding - description of operator binding

Returns:

inferred type; may be null