12 lines
269 B
Plaintext
12 lines
269 B
Plaintext
select x.*, 'folder' as rtype,
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case when y.id is null then 1
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else 0 end as is_leaf
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from
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(select * from folder
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where parentid is null) x left join
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(select unique a.* from
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folder a left join folder b
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on a.id = b.parentid
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where b.id is not NULL) y
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on x.id = y.id
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