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/**
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* Restore archived documents
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*/
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/*
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* Gather most recent docids that:
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* - have access_log event='delete' by the CN
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* - are obsoleted by a newer version
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* Then we know the current version should be restored
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*/
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/* Find the most recent version by traversing system metadata
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* see: http://www.postgresql.org/docs/8.4/static/queries-with.html
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*/
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DROP TABLE IF EXISTS current_documents;
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WITH RECURSIVE q AS
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(
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SELECT id.guid, sm.obsoleted_by
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FROM access_log al, identifier id, systemmetadata sm
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WHERE al.event = 'delete'
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AND al.date_logged >= '20140101'
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AND al.principal LIKE '%urn:node:CN%'
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AND al.docid = id.docid || '.' || id.rev
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AND id.guid = sm.guid
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AND sm.obsoleted_by IS NOT null
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UNION ALL
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SELECT newer.guid, newer.obsoleted_by
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FROM systemMetadata newer
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JOIN q
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ON q.obsoleted_by = newer.guid
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)
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SELECT guid, obsoleted_by
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INTO current_documents
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FROM q
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WHERE obsoleted_by is null
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ORDER BY guid;
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/**
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* Gather the details of the documents to restore
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*/
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DROP TABLE IF EXISTS restore_documents;
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CREATE TABLE restore_documents (
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docid VARCHAR(250),
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rev INT8,
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rootnodeid INT8,
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guid text
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);
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INSERT INTO restore_documents (
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docid,
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rev,
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rootnodeid,
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guid
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)
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SELECT
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x.docid,
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x.rev,
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x.rootnodeid,
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id.guid
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FROM current_documents cd,
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xml_revisions x,
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identifier id
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WHERE x.docid = id.docid
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AND x.rev = id.rev
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AND id.guid = cd.guid;
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-- look at them
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SELECT *
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FROM restore_documents;
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--STOP HERE WHEN TESTING
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/* Move xml_revisions back into xml_documents for the affected docids
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*/
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INSERT INTO xml_documents
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(docid, rootnodeid, docname, doctype,
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user_owner, user_updated, date_created, date_updated,
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server_location, rev, public_access, catalog_id)
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SELECT
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docid, rootnodeid, docname, doctype,
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user_owner, user_updated , date_created, date_updated,
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server_location, rev, public_access, catalog_id
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FROM xml_revisions x, restore_documents rd
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WHERE x.rootnodeid = rd.rootnodeid;
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/* Move xml_nodes_revisions back into xml_nodes for the affected docids
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*/
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INSERT INTO xml_nodes
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(nodeid, nodeindex, nodetype, nodename, nodeprefix,
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nodedata, parentnodeid, rootnodeid, docid, date_created,
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date_updated, nodedatanumerical, nodedatadate)
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SELECT
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nodeid, nodeindex, nodetype, nodename, nodeprefix,
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nodedata, parentnodeid, rootnodeid, docid, date_created,
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date_updated, nodedatanumerical, nodedatadate
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FROM xml_nodes_revisions x, restore_documents rd
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WHERE x.rootnodeid = rd.rootnodeid;
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/* Ensure ALL previous revisions of docids that
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* have been obsoleted_by something else
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* do not also have archived=true flag set
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* (Avoids encountering this issue again)
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*/
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UPDATE systemMetadata sm
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SET sm.archived = false
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FROM xml_revisions x
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identifier id
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WHERE x.docid = id.docid
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AND id.guid = sm.guid
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AND sm.obsoleted_by IS NOT null;
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/* Clean up
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*/
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DROP TABLE IF EXISTS current_documents;
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DROP TABLE IF EXISTS restore_documents;
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115
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/*
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* update the database version
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*/
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UPDATE db_version SET status=0;
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120
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INSERT INTO db_version (version, status, date_created)
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VALUES ('2.4.0', 1, CURRENT_DATE);
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