org.apache.calcite.sql.validate

Class SetopNamespace

java.lang.Object

org.apache.calcite.sql.validate.AbstractNamespace

org.apache.calcite.sql.validate.SetopNamespace

All Implemented Interfaces:

SqlValidatorNamespace

public class SetopNamespace
extends AbstractNamespace

Namespace based upon a set operation (UNION, INTERSECT, EXCEPT).

Field Summary

Fields

Modifier and Type	Field and Description
private SqlCall	call

Fields inherited from class org.apache.calcite.sql.validate.AbstractNamespace

enclosingNode, rowType, type, validator

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	SetopNamespace(SqlValidatorImpl validator, SqlCall call, SqlNode enclosingNode) Creates a SetopNamespace.

Method Summary

Modifier and Type	Method and Description
private SqlMonotonicity	combine(SqlMonotonicity m0, SqlMonotonicity m1)
SqlMonotonicity	getMonotonicity(String columnName) Returns whether and how a given column is sorted.
SqlNode	getNode() Returns the parse tree node at the root of this namespace.
RelDataType	validateImpl(RelDataType targetRowType) Validates this scope and returns the type of the records it returns.

Methods inherited from class org.apache.calcite.sql.validate.AbstractNamespace

convertToStruct, fieldExists, getEnclosingNode, getMonotonicExprs, getRowType, getRowTypeSansSystemColumns, getTable, getType, getValidator, isWrapperFor, lookupChild, makeNullable, resolve, setType, supportsModality, toStruct, translate, unwrap, validate

Methods inherited from class java.lang.Object

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

Field Detail

call

private final SqlCall call

Constructor Detail

SetopNamespace

protected SetopNamespace(SqlValidatorImpl validator,
                         SqlCall call,
                         SqlNode enclosingNode)

Creates a SetopNamespace.

Parameters:

validator - Validator

call - Call to set operator

enclosingNode - Enclosing node

Method Detail

getNode

public SqlNode getNode()

Description copied from interface: SqlValidatorNamespace

Returns the parse tree node at the root of this namespace.

Returns:

parse tree node; null for TableNamespace

getMonotonicity

public SqlMonotonicity getMonotonicity(String columnName)

Description copied from interface: SqlValidatorNamespace

Returns whether and how a given column is sorted.

Specified by:

getMonotonicity in interface SqlValidatorNamespace

Overrides:

getMonotonicity in class AbstractNamespace

combine

private SqlMonotonicity combine(SqlMonotonicity m0,
                                SqlMonotonicity m1)

validateImpl

public RelDataType validateImpl(RelDataType targetRowType)

Description copied from class: AbstractNamespace

Validates this scope and returns the type of the records it returns. External users should call AbstractNamespace.validate(org.apache.calcite.rel.type.RelDataType), which uses the AbstractNamespace.status field to protect against cycles.

Specified by:

validateImpl in class AbstractNamespace

Parameters:

targetRowType - Desired row type, must not be null, may be the data type 'unknown'.

Returns:

record data type, never null