Rename "updateOrInsert" back to "update", because it could also be "delete", or…

Rename "updateOrInsert" back to "update", because it could also be "delete", or changing a setting, or running system command. "update" and "query" are the same terms used as in "Statement.executeUpdate" and "Statement.executeQuery".

h2/src/main/org/h2/command/Command.java

@@ -92,12 +92,13 @@ public abstract class Command implements CommandInterface {
     public abstract ResultInterface queryMeta();
 
     /**
-     * Execute an updating statement, if this is possible.
+     * Execute an updating statement (for example an insert, a delete, or an update), 
+     * if this is possible.
      *
      * @return the update count
      * @throws DbException if the command is not an updating statement
      */
-    public int updateOrInsert() {
+    public int update() {
         throw DbException.get(ErrorCode.METHOD_NOT_ALLOWED_FOR_QUERY);
     }
 
@@ -250,7 +251,7 @@ public abstract class Command implements CommandInterface {
                 while (true) {
                     database.checkPowerOff();
                     try {
-                        return updateOrInsert();
+                        return update();
                     } catch (DbException e) {
                         start = filterConcurrentUpdate(e, start);
                     } catch (OutOfMemoryError e) {

h2/src/main/org/h2/command/CommandContainer.java

@@ -69,7 +69,7 @@ class CommandContainer extends Command {
     }
 
     @Override
-    public int updateOrInsert() {
+    public int update() {
         recompileIfRequired();
         setProgress(DatabaseEventListener.STATE_STATEMENT_START);
         start();

h2/src/main/org/h2/command/CommandList.java

@@ -33,12 +33,12 @@ class CommandList extends Command {
         if (remainingCommand.isQuery()) {
             remainingCommand.query(0);
         } else {
-            remainingCommand.updateOrInsert();
+            remainingCommand.update();
         }
     }
 
     @Override
-    public int updateOrInsert() {
+    public int update() {
         int updateCount = command.executeUpdate();
         executeRemaining();
         return updateCount;