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

Modifier and Type	Method and Description
@Nullable 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

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

andThen, orElse

Constructor Detail

TableFunctionReturnTypeInference

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

Method Detail

getColumnMappings

public @Nullable 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