Better unique names for temporary tables

lib/private/db/migrator.php

@@ -77,6 +77,16 @@ class Migrator {
 		}
 	}
 
+	/**
+	 * Create a unique name for the temporary table
+	 *
+	 * @param string $name
+	 * @return string
+	 */
+	protected function generateTemporaryTableName($name) {
+		return 'oc_' . $name . '_' . uniqid();
+	}
+
 	/**
 	 * Check the migration of a table on a copy so we can detect errors before messing with the real table
 	 *
@@ -85,7 +95,7 @@ class Migrator {
 	 */
 	protected function checkTableMigrate(Table $table) {
 		$name = $table->getName();
-		$tmpName = 'oc_' . uniqid();
+		$tmpName = $this->generateTemporaryTableName($name);
 
 		$this->copyTable($name, $tmpName);
 

lib/private/db/oraclemigrator.php

@@ -29,4 +29,12 @@ class OracleMigrator extends NoCheckMigrator {
 
 		return $schemaDiff;
 	}
+
+	/**
+	 * @param string $name
+	 * @return string
+	 */
+	protected function generateTemporaryTableName($name) {
+		return 'oc_' . uniqid();
+	}
 }