Ok, actually I'm a little bit confused, never used prepare(), step() and finalize() manually before. Maybe it's his absolute basics are missing me here, but maybe someone can still help me On which point I should get "wal" back?
I changed my code to the following: rc = sqlite3_open(dbPath, &db); sqlite3_exec(db, "DROP TABLE IF EXISTS nosuchtable;", testCallbackPrint, 0, &zErrMsg); rc = sqlite3_prepare_v2(db, "PRAGMA journal_mode=WAL;", 24, &stmt, NULL); --> returns SQLITE_OK rc = sqlite3_step(stmt); --> returns SQLITE_DONE sqlite3_finalize(stmt); sqlite3_exec(db, "DROP TABLE IF EXISTS nosuchtable;", testCallbackPrint, 0, &zErrMsg); [...] sqlite3_close(db); Thanks. -----Original Message----- From: sqlite-users-bounces at mailinglists.sqlite.org [mailto:sqlite-users-boun...@mailinglists.sqlite.org] On Behalf Of Simon Slavin Sent: Donnerstag, 16. April 2015 14:15 To: General Discussion of SQLite Database Subject: Re: [sqlite] Problems with pragma journal_mode On 16 Apr 2015, at 10:10am, Janke, Julian <julian.janke at capgemini.com> wrote: > rc = sqlite3_open(dbPath, &db); > rc = sqlite3_exec(db, "PRAGMA journal_mode=WAL;", testCallbackPrint, > 0, &zErrMsg); [?] sqlite3_close(db); Execute your PRAGMA as if it's a SELECT call (i.e. use sqlite3_prepare_v2(), sqlite3_step(), and sqlite3_finalize()) and check the value returned by _step(). If the command worked you should get "wal" back. Before and after your existing PRAGMA, submit any SQL command that needs database access. For example DROP TABLE IF EXISTS nosuchtable; PRAGMA journal_mode=WAL; DROP TABLE IF EXISTS nosuchtable; You can use _exec() for these other commands. I do not know that this is definitely your problem, but I seem to remember that there has to be some kind of file access for a journal mode change to take effect. In connection with another post to this thread, you should be able to change the journal mode at any time you have the only connection to the database. This includes changing between traditional journal modes and WAL mode. Simon. _______________________________________________ sqlite-users mailing list sqlite-users at mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users ________________________________ Firma: Capgemini Deutschland GmbH Aufsichtsratsvorsitzender: Antonio Schnieder ? Gesch?ftsf?hrer: Dr. Michael Schulte (Sprecher) ? Jost F?rster ? Dr. Peter Lempp ? Dr. Volkmar Varnhagen Amtsgericht Berlin-Charlottenburg, HRB 98814 This message contains information that may be privileged or confidential and is the property of the Capgemini Group. It is intended only for the person to whom it is addressed. If you are not the intended recipient, you are not authorized to read, print, retain, copy, disseminate, distribute, or use this message or any part thereof. If you receive this message in error, please notify the sender immediately and delete all copies of this message.
