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- Big performance boost on faceting: skip the inner order by · 2 ✖
id | html_url | issue_url | node_id | user | created_at | updated_at ▲ | author_association | body | reactions | issue | performed_via_github_app |
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880900534 | https://github.com/simonw/datasette/issues/1394#issuecomment-880900534 | https://api.github.com/repos/simonw/datasette/issues/1394 | MDEyOklzc3VlQ29tbWVudDg4MDkwMDUzNA== | simonw 9599 | 2021-07-15T17:58:03Z | 2021-07-15T17:58:03Z | OWNER | Started a conversation about this on the SQLite forum: https://sqlite.org/forum/forumpost/2d76f2bcf65d256a?t=h |
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Big performance boost on faceting: skip the inner order by 944870799 | |
880287483 | https://github.com/simonw/datasette/issues/1394#issuecomment-880287483 | https://api.github.com/repos/simonw/datasette/issues/1394 | MDEyOklzc3VlQ29tbWVudDg4MDI4NzQ4Mw== | simonw 9599 | 2021-07-15T00:01:47Z | 2021-07-15T00:01:47Z | OWNER | I wrote this code: ```python _order_by_re = re.compile(r"(^.) order by [a-zA-Z_][a-zA-Z0-9_]+( desc)?$", re.DOTALL) _order_by_braces_re = re.compile(r"(^.) order by [[^]]+]( desc)?$", re.DOTALL) def strip_order_by(sql): for regex in (_order_by_re, _order_by_braces_re): match = regex.match(sql) if match is not None: return match.group(1) return sql @pytest.mark.parametrize( "sql,expected", [ ("blah", "blah"), ("select * from foo", "select * from foo"), ("select * from foo order by bah", "select * from foo"), ("select * from foo order by bah desc", "select * from foo"), ("select * from foo order by [select]", "select * from foo"), ("select * from foo order by [select] desc", "select * from foo"), ], ) def test_strip_order_by(sql, expected): assert strip_order_by(sql) == expected ``` But it turns out I don't need it! The SQL that is passed to the facet class is created by this code: https://github.com/simonw/datasette/blob/ba11ef27edd6981eeb26d7ecf5aa236707f5f8ce/datasette/views/table.py#L677-L684 And the only place that uses that So I can change that to |
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Big performance boost on faceting: skip the inner order by 944870799 |
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