org.eigenbase.sql.type
Class MultisetOperandTypeChecker

java.lang.Object
  org.eigenbase.sql.type.MultisetOperandTypeChecker

All Implemented Interfaces:

SqlOperandTypeChecker

public class MultisetOperandTypeChecker
extends Object
implements SqlOperandTypeChecker

Parameter type-checking strategy types must be [nullable] Multiset, [nullable] Multiset and the two types must have the same element type

Version:

$Id: //open/dev/farrago/src/org/eigenbase/sql/type/MultisetOperandTypeChecker.java#9 $

Author:

Wael Chatila

See Also:

MultisetSqlType.getComponentType()

Constructor Summary

MultisetOperandTypeChecker()

Method Summary

boolean	checkOperandTypes(SqlCallBinding callBinding, boolean throwOnFailure) Checks the types of all operands to an operator call.
String	getAllowedSignatures(SqlOperator op, String opName) Returns a string describing the allowed formal signatures of a call, e.g.
SqlOperandCountRange	getOperandCountRange()

Methods inherited from class java.lang.Object

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

Constructor Detail

MultisetOperandTypeChecker

public MultisetOperandTypeChecker()

Method Detail

checkOperandTypes

public boolean checkOperandTypes(SqlCallBinding callBinding,
                                 boolean throwOnFailure)

Description copied from interface: SqlOperandTypeChecker

Checks the types of all operands to an operator call.

Specified by:

checkOperandTypes in interface SqlOperandTypeChecker

Parameters:

callBinding - description of the call to be checked

throwOnFailure - whether to throw an exception if check fails (otherwise returns false in that case)

Returns:

whether check succeeded

getOperandCountRange

public SqlOperandCountRange getOperandCountRange()

Specified by:

getOperandCountRange in interface SqlOperandTypeChecker

Returns:

range of operand counts allowed in a call

getAllowedSignatures

public String getAllowedSignatures(SqlOperator op,
                                   String opName)

Description copied from interface: SqlOperandTypeChecker

Returns a string describing the allowed formal signatures of a call, e.g. "SUBSTR(VARCHAR, INTEGER, INTEGER)".

Specified by:

getAllowedSignatures in interface SqlOperandTypeChecker

Parameters:

op - the operator being checked

opName - name to use for the operator in case of aliasing

Returns:

generated string