Il giorno giovedì 11 settembre 2014 18:39:24 UTC+2, Jonathan Vanasco ha scritto: > > i once thought about extending SqlAlchemy to handle this issue behind the > scenes, but each database treats `IN()` differently. for example: oracle > maxes out at a number of elements, while mysql maxes out based on the size > of the overall statement (which is configured on the server). it's too > much work to limit this in sqlalchemy, as these limits change across > servers. [ i forget what postgres maxed out on, i think it was a hard > number too.] > > the workaround I used was to just build a query-base, and then run > multiple selects with a single `IN` within a for-loop which appends to a > list. i found that performance to be much better than chaining multiple > `IN()` with `OR` > My problem is to find a dataset of more than 999 records and sort all through ORDER BY statement. How can I use multiple selects and order all records?
I try to explain my problem: I have a gui where I display all the records on my table. Then I make a search and I find 1500 records. Then I want to order the current dataset (1500 records) by some parameter, so I pass to my function the list of 1500 records ID which will be found the records through the IN() query with the ORDER BY statement. Now I don't understand how I can find more than 999 records in sqlite and sort the records through ORDER BY. What strategy I can use? Suggestions? Thanks a lot! Luca -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout.
