make -simpleExecute: easier to use.

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/sqlclient/trunk@40495 72102866-910b-0410-8b05-ffd578937521

SQLClient.h

@@ -1016,9 +1016,11 @@ SQLCLIENT_PRIVATE
  * Calls -backendExecute: in a safe manner.<br />
  * Handles locking.<br />
  * Maintains -lastOperation date.<br />
- * Returns the result of -backendExecute:
+ * Returns the result of the -backendExecute: method call.<br />
+ * Accepts a mutable array argument (as produced by the prepare methods)
+ * or a simple SQL statement (a string), otherwise raises an exception.
  */
-- (NSInteger) simpleExecute: (NSArray*)info;
+- (NSInteger) simpleExecute: (id)info;
 
 /**
  * Calls -simpleQuery:recordType:listType: with the default record class

SQLClient.m

@@ -2441,11 +2441,24 @@ static int	        poolConnections = 0;
   [lock unlock];
 }
 
-- (NSInteger) simpleExecute: (NSArray*)info
+- (NSInteger) simpleExecute: (id)info
 {
   NSInteger     result;
   NSString      *debug = nil;
 
+  if ([info isKindOfClass: NSArrayClass] == NO)
+    {
+      if ([info isKindOfClass: NSStringClass] == NO)
+        {
+          [NSException raise: NSInvalidArgumentException
+                      format: @"[%@ -simpleExecute: %@ (class %@)]",
+            NSStringFromClass([self class]),
+            info,
+            NSStringFromClass([info class])];
+        }
+      info = [NSMutableArray arrayWithObject: info];
+    }
+
   [lock lock];
   NS_DURING
     {