Delete one by one or USE KEYS

SQL++
1

A job needs to delete old documents. each batch it deletes about 200 documents. we have the document ids.
which way will be more efficient:

  • delete by query:
    delete from bucket use keys [… ids …]
    bucket->query(query)
  • one by one:
    loop through all ids and
    bucket->remove(id)

thanks in advance.

2

If you know document keys use bucket->remove(id)
You can do asynchronous and parallel too.

1 Like
3

Thank you @vsr1. I assume even with Use keys it still needs to be processed by query analyzer, but with remove(), it is just a key-value operation?

4

As long has you dont have any WHERE clause it is simple remove in loop.
If you have where clause it will do need to do fetch and remove.
NOTE: bucket.query() first need to send to to n1ql node and which need to remove from data nodes It is 2 hops operations.

1 Like
5

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