org.apache.calcite.sql.type

Class SqlTypeTransformCascade

java.lang.Object

org.apache.calcite.sql.type.SqlTypeTransformCascade

All Implemented Interfaces:

SqlReturnTypeInference

public class SqlTypeTransformCascade
extends Object
implements SqlReturnTypeInference

Strategy to infer the type of an operator call from the type of the operands by using one SqlReturnTypeInference rule and a combination of SqlTypeTransforms.

Constructor Summary

Constructors

Constructor and Description
SqlTypeTransformCascade(SqlReturnTypeInference rule, SqlTypeTransform... transforms) Creates a SqlTypeTransformCascade from a rule and an array of one or more transforms.

Method Summary

Modifier and Type	Method and Description
@Nullable 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

Methods inherited from interface org.apache.calcite.sql.type.SqlReturnTypeInference

andThen, orElse

Constructor Detail

SqlTypeTransformCascade

public SqlTypeTransformCascade(SqlReturnTypeInference rule,
                               SqlTypeTransform... transforms)

Creates a SqlTypeTransformCascade from a rule and an array of one or more transforms.

Method Detail

inferReturnType

public @Nullable 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