How to get total rows in mysql if there was no `LIMIT` clause?
from pe1uca@lemmy.pe1uca.dev to programming@programming.dev on 16 Aug 2024 15:46
https://lemmy.pe1uca.dev/post/1523687
from pe1uca@lemmy.pe1uca.dev to programming@programming.dev on 16 Aug 2024 15:46
https://lemmy.pe1uca.dev/post/1523687
I was using SQL_CALC_FOUND_ROWS and SELECT FOUND_ROWS();
But this has been deprecated dev.mysql.com/doc/…/information-functions.html#fu…
The recommended way now is first to query with limit and then again without it selecting count(*).
My query is a bit complex and joins a couple of tables with a large number of records, which makes each select take up to 4 seconds, so my process now takes double the time compared to as I just keep using found rows.
How can I go back to just running the select a single time and still getting the total number of rows found without the limit?
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Select count(*) from (select …) ? See if the query optimizer pipelines that.
Maybe I misunderstand what you are trying to do.
The OP wants the paginated table data and the count. With a single query execution.
In normal SQL you’d use a window function to do this but I don’t know if mysql supports that.
Would it work to write the query as a common table expression, then select your columns from that table and join it with a
count(*)aggregation of the table?.