issue_comments: 1420094396
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| html_url | issue_url | id | node_id | user | created_at | updated_at | author_association | body | reactions | issue | performed_via_github_app |
|---|---|---|---|---|---|---|---|---|---|---|---|
| https://github.com/simonw/datasette/issues/2019#issuecomment-1420094396 | https://api.github.com/repos/simonw/datasette/issues/2019 | 1420094396 | IC_kwDOBm6k_c5UpOu8 | 9599 | 2023-02-07T02:18:11Z | 2023-02-07T02:19:16Z | OWNER | For the SQL underlying this page (the second page in that compound primary key paginated sequence): https://latest.datasette.io/fixtures/compound_three_primary_keys?_next=a%2Cd%2Cv The explain for the default query: https://latest.datasette.io/fixtures?sql=explain+select%0D%0A++pk1%2C%0D%0A++pk2%2C%0D%0A++pk3%2C%0D%0A++content%0D%0Afrom%0D%0A++compound_three_primary_keys%0D%0Awhere%0D%0A++%28%0D%0A++++%28pk1+%3E+%3Ap0%29%0D%0A++++or+%28%0D%0A++++++pk1+%3D+%3Ap0%0D%0A++++++and+pk2+%3E+%3Ap1%0D%0A++++%29%0D%0A++++or+%28%0D%0A++++++pk1+%3D+%3Ap0%0D%0A++++++and+pk2+%3D+%3Ap1%0D%0A++++++and+pk3+%3E+%3Ap2%0D%0A++++%29%0D%0A++%29%0D%0Aorder+by%0D%0A++pk1%2C%0D%0A++pk2%2C%0D%0A++pk3%0D%0Alimit%0D%0A++101&p0=a&p1=d&p2=v The explain for that query rewritten as this: ```sql explain select * from ( select pk1, pk2, pk3, content from compound_three_primary_keys ) where ( (pk1 > :p0) or ( pk1 = :p0 and pk2 > :p1 ) or ( pk1 = :p0 and pk2 = :p1 and pk3 > :p2 ) ) order by pk1, pk2, pk3 limit 101 ``` https://latest.datasette.io/fixtures?sql=explain+select+*+from+%28select+%0D%0A++pk1%2C%0D%0A++pk2%2C%0D%0A++pk3%2C%0D%0A++content%0D%0Afrom%0D%0A++compound_three_primary_keys%0D%0A%29%0D%0A++where%0D%0A++%28%0D%0A++++%28pk1+%3E+%3Ap0%29%0D%0A++++or+%28%0D%0A++++++pk1+%3D+%3Ap0%0D%0A++++++and+pk2+%3E+%3Ap1%0D%0A++++%29%0D%0A++++or+%28%0D%0A++++++pk1+%3D+%3Ap0%0D%0A++++++and+pk2+%3D+%3Ap1%0D%0A++++++and+pk3+%3E+%3Ap2%0D%0A++++%29%0D%0A++%29%0D%0Aorder+by%0D%0A++pk1%2C%0D%0A++pk2%2C%0D%0A++pk3%0D%0Alimit%0D%0A++101&p0=a&p1=d&p2=v Both explains have 31 steps and look pretty much identical. | {"total_count": 0, "+1": 0, "-1": 0, "laugh": 0, "hooray": 0, "confused": 0, "heart": 0, "rocket": 0, "eyes": 0} | 1573424830 |