Sphinx Active Record saving advanced to use 'replace' for runtime indexes

extensions/sphinx/ActiveRecord.php

@@ -850,6 +850,15 @@ class ActiveRecord extends Model
 			$this->afterSave(false);
 			return 0;
 		}
+
+		if ($this->getIndexSchema()->isRuntime) {
+			$values = array_merge($values, $this->getOldPrimaryKey(true));
+			$command = static::getDb()->createCommand();
+			$command->replace(static::indexName(), $values);
+			// We do not check the return value of replace because it's possible
+			// that the REPLACE statement doesn't change anything and thus returns 0.
+			$rows = $command->execute();
+		} else {
 			$condition = $this->getOldPrimaryKey(true);
 			$lock = $this->optimisticLock();
 			if ($lock !== null) {
@@ -865,6 +874,7 @@ class ActiveRecord extends Model
 			if ($lock !== null && !$rows) {
 				throw new StaleObjectException('The object being updated is outdated.');
 			}
+		}
 
 		foreach ($values as $name => $value) {
 			$this->_oldAttributes[$name] = $this->_attributes[$name];