I’ll raise the default limit for the next release of System.Data.SQLite.
Sent from my iPhone > On Jan 16, 2020, at 2:01 PM, Keith Bertram <keith.bert...@bentley.com> wrote: > > Yes I recognize that this would be a problem. I plan on having no more than > 20-25 attachments. > > If I understand correctly, the only way to set the value above 10, is to > recompile the source and set the SQLITE_MAX_ATTACHED variable to a number > higher than my 20-25 and also below 125. I was hoping to just use the .dll > straight out of nuget. > > Keith > > -----Original Message----- > From: sqlite-users <sqlite-users-boun...@mailinglists.sqlite.org> On Behalf > Of Simon Slavin > Sent: Thursday, January 16, 2020 10:19 AM > To: SQLite mailing list <sqlite-users@mailinglists.sqlite.org> > Subject: Re: [sqlite] sqlite3_limit equivalent in System.Data.SQLite.dll > >> On 16 Jan 2020, at 3:21pm, Keith Bertram <keith.bert...@bentley.com> wrote: >> >> Ok. I was hoping I could set the value to a value higher than 10 without >> compiling. I'm curious why the limit is set by default to 10. > > The actual limit is 125. You can set SQLITE_MAX_ATTACHED to more than 125. > > It's worth explaining why you wouldn't want to attach 200 databases to the > same connection. Each time you refer to an attached database, SQLite has to > search for that database in a list, meaning it has to match the schema name, > then iterate through, on average, n/2 entries to find the attachment number. > The longer that list gets, the slower every operation not on 'main' or 'temp' > gets. (It's possible that SQLite hashes schema names, but I don't remember > anyone ever saying that.) > > I have seen posts to this list that say things like "We make one database > file per day, and I want to search them all at once so I want to attach 500 > files to my connection.". It's a terrible idea and would result in slow > performance. > _______________________________________________ > sqlite-users mailing list > sqlite-users@mailinglists.sqlite.org > https://urldefense.proofpoint.com/v2/url?u=http-3A__mailinglists.sqlite.org_cgi-2Dbin_mailman_listinfo_sqlite-2Dusers&d=DwIGaQ&c=hmGTLOph1qd_VnCqj81HzEWkDaxmYdIWRBdoFggzhj8&r=l90GvhOo_5uKc2d8JIuoVtb0fH4diec3z4TsA-hoNTc&m=UbVOkNIBY7TVyWQB9v2LK-xBIWk_rpXp5sXbzOFNwr0&s=U-mtya649Yx5nGJacNeBxjNHS1gBxc2IssQUKmPwgbA&e= > > _______________________________________________ > sqlite-users mailing list > sqlite-users@mailinglists.sqlite.org > http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users > _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users
