adv_sample_user_queries_plus
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| Both sides previous revision Previous revision Next revision | Previous revision | ||
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adv_sample_user_queries_plus [2016/03/13 23:24] daniel |
adv_sample_user_queries_plus [2021/05/15 14:21] (current) daniel |
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| - | ==== Advanced examples of SQL queries ==== | + | ==== Advanced examples of SQL queries ==== |
| === Messages sent, with senders or recipients from a specific domain, but not tagged with a specified tag: === | === Messages sent, with senders or recipients from a specific domain, but not tagged with a specified tag: === | ||
| Line 25: | Line 25: | ||
| <code sql> | <code sql> | ||
| SELECT mail_id FROM mail m | SELECT mail_id FROM mail m | ||
| - | WHERE status&(16+32)=0 | + | WHERE status&32=0 AND status&16 -- intentionally split to benefit from the index on mail.status&32=0 |
| AND msg_date<now()-'1 month'::interval | AND msg_date<now()-'1 month'::interval | ||
| AND thread_id is not null | AND thread_id is not null | ||
| Line 34: | Line 34: | ||
| </code> | </code> | ||
| ---- | ---- | ||
| + | |||
| + | === Messages from the thread with the most unprocessed messages === | ||
| + | <code sql> | ||
| + | select mail_id from mail where thread_id in | ||
| + | (select thread_id | ||
| + | from mail | ||
| + | where status&32=0 and status&16=0 | ||
| + | and thread_id is not null | ||
| + | group by thread_id | ||
| + | order by count(*) desc | ||
| + | limit 1 | ||
| + | ) | ||
| + | </code> | ||
| See the [[http://www.manitou-mail.org/doc/mdx/database-schema.html|database schema documentation]] for definitions of tables and columns. | See the [[http://www.manitou-mail.org/doc/mdx/database-schema.html|database schema documentation]] for definitions of tables and columns. | ||
adv_sample_user_queries_plus.1457907869.txt.gz ยท Last modified: 2016/03/13 23:24 by daniel
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