org.eigenbase.sql.validate
Class ParameterScope

java.lang.Object
  org.eigenbase.sql.validate.EmptyScope
      org.eigenbase.sql.validate.ParameterScope

All Implemented Interfaces:

SqlValidatorScope

public class ParameterScope
extends EmptyScope

A scope which contains nothing besides a few parameters. Like EmptyScope (which is its base class), it has no parent scope.

Since:

Mar 25, 2003

Version:

$Id: //open/dev/farrago/src/org/eigenbase/sql/validate/ParameterScope.java#9 $

Author:

jhyde

See Also:

ParameterNamespace

Field Summary

private Map<String,RelDataType>

nameToTypeMap Map from the simple names of the parameters to types of the parameters (RelDataType).

Fields inherited from class org.eigenbase.sql.validate.EmptyScope

validator

Constructor Summary

ParameterScope(SqlValidatorImpl validator, Map<String,RelDataType> nameToTypeMap)

Method Summary

SqlIdentifier	fullyQualify(SqlIdentifier identifier) Converts an identifier into a fully-qualified identifier.
SqlValidatorScope	getOperandScope(SqlCall call) Returns the scope within which operands to a call are to be validated.
SqlValidatorNamespace	resolve(String name, SqlValidatorScope[] ancestorOut, int[] offsetOut) Looks up a node with a given name.

Methods inherited from class org.eigenbase.sql.validate.EmptyScope

addChild, findAliases, findAllColumnNames, findAllTableNames, findQualifyingTableName, getMonotonicity, getNode, getOrderList, getValidator, lookupWindow, resolveColumn, validateExpr

Methods inherited from class java.lang.Object

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

Field Detail

nameToTypeMap

private final Map<String,RelDataType> nameToTypeMap

Map from the simple names of the parameters to types of the parameters (RelDataType).

Constructor Detail

ParameterScope

public ParameterScope(SqlValidatorImpl validator,
                      Map<String,RelDataType> nameToTypeMap)

Method Detail

fullyQualify

public SqlIdentifier fullyQualify(SqlIdentifier identifier)

Description copied from interface: SqlValidatorScope

Converts an identifier into a fully-qualified identifier. For example, the "empno" in "select empno from emp natural join dept" becomes "emp.empno".

Specified by:

fullyQualify in interface SqlValidatorScope

Overrides:

fullyQualify in class EmptyScope

getOperandScope

public SqlValidatorScope getOperandScope(SqlCall call)

Description copied from interface: SqlValidatorScope

Returns the scope within which operands to a call are to be validated. Usually it is this scope, but when the call is to an aggregate function and this is an aggregating scope, it will be a a different scope.

Specified by:

getOperandScope in interface SqlValidatorScope

Overrides:

getOperandScope in class EmptyScope

Parameters:

call - Call

Returns:

Scope within which to validate arguments to call.

resolve

public SqlValidatorNamespace resolve(String name,
                                     SqlValidatorScope[] ancestorOut,
                                     int[] offsetOut)

Description copied from interface: SqlValidatorScope

Looks up a node with a given name. Returns null if none is found.

Specified by:

resolve in interface SqlValidatorScope

Overrides:

resolve in class EmptyScope

Parameters:

name - Name of node to find

ancestorOut - If not null, writes the ancestor scope here

offsetOut - If not null, writes the offset within the ancestor here