From b0e6542dc2a72289a396d2e29604e4e83a6136a2 Mon Sep 17 00:00:00 2001
From: Andreas Fischer <bantu@owncloud.com>
Date: Mon, 14 Apr 2014 18:29:47 +0200
Subject: [PATCH] Add error handling for --clear-schema on Oracle.

---
 core/command/db/converttype.php | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/core/command/db/converttype.php b/core/command/db/converttype.php
index 6ab2d893c6..64178d1ef7 100644
--- a/core/command/db/converttype.php
+++ b/core/command/db/converttype.php
@@ -120,6 +120,17 @@ class ConvertType extends Command {
 		$toDB = $this->getToDBConnection($input, $output);
 
 		if ($input->getOption('clear-schema')) {
+			if ($input->getArgument('type') === 'oci') {
+				// Doctrine unconditionally tries (at least in version 2.3)
+				// to drop sequence triggers when dropping a table, even though
+				// such triggers may not exist. This results in errors like
+				// "ORA-04080: trigger 'OC_STORAGES_AI_PK' does not exist".
+				$output->writeln(sprintf(
+					'<error>The --clear-schema option is not supported when converting to Oracle (oci).</error>',
+					$input->getArgument('type')
+				));
+				return 1;
+			}
 			$this->clearSchema($toDB->getSchemaManager(), $input, $output);
 		}