Package org.apache.calcite.sql.validate

Class ParameterNamespace

java.lang.Object

org.apache.calcite.sql.validate.AbstractNamespace

org.apache.calcite.sql.validate.ParameterNamespace

All Implemented Interfaces:

SqlValidatorNamespace

class ParameterNamespace
extends AbstractNamespace

Namespace representing the type of a dynamic parameter.

See Also:

ParameterScope

Field Summary

Fields

Modifier and Type	Field	Description
private RelDataType	type

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

enclosingNode, rowType, validator

Constructor Summary

Constructors

Constructor	Description
ParameterNamespace(SqlValidatorImpl validator, RelDataType type)

Method Summary

Modifier and Type	Method	Description
SqlNode	getNode()	Returns the parse tree node at the root of this namespace.
RelDataType	getRowType()	Returns the row type of this namespace, which comprises a list of names and types of the output columns.
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, getMonotonicity, 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

type

private final RelDataType type

Constructor Detail

ParameterNamespace

ParameterNamespace(SqlValidatorImpl validator,
                   RelDataType type)

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

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

getRowType

public RelDataType getRowType()

Description copied from interface: SqlValidatorNamespace

Returns the row type of this namespace, which comprises a list of names and types of the output columns. If the scope's type has not yet been derived, derives it.

Specified by:

getRowType in interface SqlValidatorNamespace

Overrides:

getRowType in class AbstractNamespace

Returns:

Row type of this namespace, never null, always a struct