Implement query cancellation support within MCPKit, and add it to the task functionality:

 - MCPKit now supports cancelling the active query; for MySQL servers >= 5.0.0 a query kill is attempted from a new connection, and if that fails or for MySQL < 5 a reconnect is triggered.
 - TableDocument now supports enabling a cancel task button on the task interface, including an optional callback
 - Implement query cancellation for custom queries.  This addresses Issue #86.
 - Implement query cancellation for table content loads, filters, and sorts.

1 files changed, 5 insertions, 0 deletions

diff --git a/Frameworks/MCPKit/MCPFoundationKit/MCPConnection.h b/Frameworks/MCPKit/MCPFoundationKit/MCPConnection.h
index 548425e1..0442bf9f 100644
--- a/Frameworks/MCPKit/MCPFoundationKit/MCPConnection.h
+++ b/Frameworks/MCPKit/MCPFoundationKit/MCPConnection.h
@@ -111,6 +111,8 @@ static inline NSData* NSStringDataUsingLossyEncoding(NSString* self, NSInteger e
 	uint64_t connectionStartTime;
 	
 	BOOL retryAllowed;
+	BOOL queryCancelled;
+	BOOL queryCancelUsedReconnect;
 	BOOL delegateQueryLogging;
 	BOOL delegateResponseToWillQueryString;
 	
@@ -205,6 +207,9 @@ void performThreadedKeepAlive(void *ptr);
 - (id)queryString:(NSString *) query usingEncoding:(NSStringEncoding) encoding streamingResult:(NSInteger) streamResult;
 - (my_ulonglong)affectedRows;
 - (my_ulonglong)insertId;
+- (void)cancelCurrentQuery;
+- (BOOL)queryCancelled;
+- (BOOL)queryCancellationUsedReconnect;
 
 // Locking
 - (void)lockConnection;