Umbraco Fix – Empty recycle bin using SQL if backend fails

Updated thanks to jeffreypriebe

-- Uncomment below to verify the number of nodes returned is the same as the number of nodes that is in the Recycle Bin
-- SELECT * FROM umbracoNode WHERE path LIKE '%-20%' AND id != -20

--Setup the temporary table
CREATE TABLE #temp ([id] int);
INSERT #temp select id from umbracoNode where path like '%-20%' and id!=-20

-- Delete all 'related' nodes and table contents...
DELETE FROM cmsPreviewXml WHERE nodeId IN (SELECT id FROM #temp)
DELETE FROM cmsContentVersion WHERE contentId IN (SELECT id FROM #temp)
DELETE FROM cmsDocument WHERE nodeId IN (SELECT id FROM #temp)
DELETE FROM cmsContentXML WHERE nodeId IN (SELECT id FROM #temp)
DELETE FROM cmsContent WHERE nodeId IN (SELECT id FROM #temp)
DELETE FROM cmsPropertyData WHERE contentNodeId IN (SELECT id FROM #temp)
DELETE FROM umbracoUser2NodePermission WHERE nodeId IN (SELECT id FROM #temp)
DELETE FROM umbracoRelation  where parentId in (select id from #temp) or childId in (select id from #temp)

-- remove fk constraint so that umbracoNode can delete
ALTER TABLE umbracoNode DROP CONSTRAINT FK_umbracoNode_umbracoNode
-- delete the XML nodes...
DELETE FROM umbracoNode WHERE id in (SELECT id FROM #temp)
-- re add fk constraint to umbracoNode
ALTER TABLE umbracoNode WITH NOCHECK ADD CONSTRAINT FK_umbracoNode_umbracoNode
FOREIGN KEY (parentId)
REFERENCES umbracoNode (id)

--Cleanup temp
DROP TABLE #temp;