org.apache.calcite.sql.validate

Class TableNamespace

java.lang.Object

org.apache.calcite.sql.validate.AbstractNamespace

org.apache.calcite.sql.validate.TableNamespace

All Implemented Interfaces:

SqlValidatorNamespace

class TableNamespace
extends AbstractNamespace

Namespace based on a table from the catalog.

Field Summary

Fields

Modifier and Type	Field and Description
com.google.common.collect.ImmutableList<RelDataTypeField>	extendedFields
private SqlValidatorTable	table

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

enclosingNode, rowType, type, validator

Constructor Summary

Constructors

Modifier	Constructor and Description
(package private)	TableNamespace(SqlValidatorImpl validator, SqlValidatorTable table)
private	TableNamespace(SqlValidatorImpl validator, SqlValidatorTable table, List<RelDataTypeField> fields) Creates a TableNamespace.

Method Summary

Modifier and Type	Method and Description
private void	checkExtendedColumnTypes(SqlNodeList extendList) Ensures that extended columns that have the same name as a base column also have the same data-type.
TableNamespace	extend(SqlNodeList extendList) Creates a TableNamespace based on the same table as this one, but with extended fields.
private RelDataType	getBaseRowType() Gets the data-type of all columns in a table (for a view table: including columns of the underlying table)
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.
SqlValidatorTable	getTable() Returns the underlying table, or null if there is none.
protected 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, 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

table

private final SqlValidatorTable table

extendedFields

public final com.google.common.collect.ImmutableList<RelDataTypeField> extendedFields

Constructor Detail

TableNamespace

private TableNamespace(SqlValidatorImpl validator,
                       SqlValidatorTable table,
                       List<RelDataTypeField> fields)

Creates a TableNamespace.

TableNamespace

TableNamespace(SqlValidatorImpl validator,
               SqlValidatorTable table)

Method Detail

validateImpl

protected 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

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

getTable

public SqlValidatorTable getTable()

Description copied from interface: SqlValidatorNamespace

Returns the underlying table, or null if there is none.

Specified by:

getTable in interface SqlValidatorNamespace

Overrides:

getTable in class AbstractNamespace

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

extend

public TableNamespace extend(SqlNodeList extendList)

Creates a TableNamespace based on the same table as this one, but with extended fields.

Extended fields are "hidden" or undeclared fields that may nevertheless be present if you ask for them. Phoenix uses them, for instance, to access rarely used fields in the underlying HBase table.

getBaseRowType

private RelDataType getBaseRowType()

Gets the data-type of all columns in a table (for a view table: including columns of the underlying table)

checkExtendedColumnTypes

private void checkExtendedColumnTypes(SqlNodeList extendList)

Ensures that extended columns that have the same name as a base column also have the same data-type.