73 lines
2.2 KiB
SQL
73 lines
2.2 KiB
SQL
-- Deleting non-current page revisions
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DELETE FROM PageRevision
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WHERE EXISTS (
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SELECT 1
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FROM (
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SELECT PageId, MAX(Revision) AS MaxRevision
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FROM PageRevision
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GROUP BY PageId
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) AS MostRecent
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WHERE PageRevision.PageId = MostRecent.PageId
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AND PageRevision.Revision < MostRecent.MaxRevision
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);
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-- Deleting non-current attachments.
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DELETE FROM PageRevisionAttachment
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WHERE EXISTS (
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SELECT 1
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FROM (
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SELECT PageFileId, PageId, MAX(FileRevision) AS MaxFileRevision
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FROM PageRevisionAttachment
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GROUP BY PageId, PageFileId
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) AS MostRecent
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WHERE PageRevisionAttachment.PageFileId = MostRecent.PageFileId
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AND PageRevisionAttachment.PageId = MostRecent.PageId
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AND PageRevisionAttachment.FileRevision < MostRecent.MaxFileRevision
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);
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-- Deleting non-current page revision attachments
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DELETE FROM PageRevisionAttachment
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WHERE EXISTS (
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SELECT 1
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FROM (
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SELECT PageFileId, PageId, MAX(PageRevision) AS MaxPageRevision
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FROM PageRevisionAttachment
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GROUP BY PageId, PageFileId
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) AS MostRecent
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WHERE PageRevisionAttachment.PageFileId = MostRecent.PageFileId
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AND PageRevisionAttachment.PageId = MostRecent.PageId
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AND PageRevisionAttachment.PageRevision < MostRecent.MaxPageRevision
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);
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-- Deleting non-current page file revisions.
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DELETE FROM PageFileRevision
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WHERE EXISTS (
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SELECT 1
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FROM (
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SELECT PageFileId, MAX(Revision) AS MaxPageRevision
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FROM PageFileRevision
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GROUP BY PageFileId
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) AS MostRecent
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WHERE PageFileRevision.PageFileId = MostRecent.PageFileId
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AND PageFileRevision.Revision < MostRecent.MaxPageRevision
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);
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-- Delete orphaned PageFileRevision
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DELETE FROM PageFileRevision
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WHERE PageFileId NOT IN (
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SELECT PageFileId FROM PageRevisionAttachment
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);
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-- Delete orphaned PageFile
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DELETE FROM PageFile
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WHERE Id NOT IN (
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SELECT PageFileId FROM PageRevisionAttachment
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);
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-- Assuming everything else worked, lets set all of the revisions back to 1.
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UPDATE [Page] SET Revision = 1;
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UPDATE PageRevision SET Revision = 1;
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UPDATE PageRevisionAttachment SET PageRevision = 1, FileRevision = 1;
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UPDATE PageFileRevision SET Revision = 1;
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UPDATE PageFile SET Revision = 1;
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