Region.ExistsValue Method (String)

RegionExistsValue Method (String)

Executes the query on the server based on the predicate and returns whether any result exists. Valid only for a Native Client region.

Namespace: GemStone.GemFire.Cache
Assembly: Gemstone.Gemfire.Cache (in Gemstone.Gemfire.Cache.dll) Version: 9.0.6.18

Syntax

public bool ExistsValue(
	string predicate
)

Public Function ExistsValue ( 
	predicate As String
) As Boolean

public:
bool ExistsValue(
	String^ predicate
)

member ExistsValue : 
        predicate : string -> bool

predicate: Type: SystemString
The query predicate (just the WHERE clause) or the entire query to execute

Type: Boolean
true if the result size is non-zero, false otherwise.

Exceptions

Exception	Condition
IllegalArgumentException	If the predicate is empty.
IllegalStateException	If some error occurred.
CacheServerException	If an exception is received from the Java cache server.
NotConnectedException	if not connected to the GemFire system because the client cannot establish usable connections to any of the servers given to it. For pools configured with locators, if no locators are available, innerException of NotConnectedException is set to NoAvailableLocatorsException.
MessageException	If the message received from server could not be handled. This will be the case when an unregistered typeId is received in the reply or reply is not well formed. More information can be found in the log.
QueryException	If some query error occurred at the server.
TimeoutException	if the operation timed out
CacheClosedException	if the cache has been closed