org.apache.calcite.sql.type

Class TableFunctionReturnTypeInference

java.lang.Object

org.apache.calcite.sql.type.ExplicitReturnTypeInference

org.apache.calcite.sql.type.TableFunctionReturnTypeInference

All Implemented Interfaces:

SqlReturnTypeInference

public class TableFunctionReturnTypeInference
extends ExplicitReturnTypeInference

TableFunctionReturnTypeInference implements rules for deriving table function output row types by expanding references to cursor parameters.

Field Summary

Fields inherited from class org.apache.calcite.sql.type.ExplicitReturnTypeInference

protoType

Constructor Summary

Constructors

Constructor and Description
TableFunctionReturnTypeInference(RelProtoDataType unexpandedOutputType, List<String> paramNames, boolean isPassthrough)

Method Summary

Methods

Modifier and Type	Method and Description
Set<RelColumnMapping>	getColumnMappings()
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

TableFunctionReturnTypeInference

public TableFunctionReturnTypeInference(RelProtoDataType unexpandedOutputType,
                                List<String> paramNames,
                                boolean isPassthrough)

Method Detail

getColumnMappings

public Set<RelColumnMapping> getColumnMappings()

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

Overrides:

inferReturnType in class ExplicitReturnTypeInference

Parameters:

opBinding - description of operator binding

Returns:

inferred type; may be null