Le Sat, 19 Sep 2015 15:21:44 +0200, Kees Nuyt <k.nuyt at zonnet.nl> a ?crit :
> On Sat, 19 Sep 2015 11:29:37 +0200, gwenn <gwenn.kahz at gmail.com> > wrote: > > >Hello, > >Is there any way to know when a prepared statement is recompiled ? > >For example: > > > >rc = sqlite3_prepare_v2(db, "SELECT * FROM test", -1, &stmt, NULL); > >... > >cc = sqlite3_column_count(stmt); > >... > >rc = sqlite3_exec(db, "ALTER TABLE test ADD COLUMN data DEFAULT > >'missing'", NULL, NULL, NULL); > >... > >rc = sqlite3_step(stmt); > >// how to know that the column count is not good anymore ? > > http://www.sqlite.org/rescode.html#schema > not sure if I understand, but If you just add a column, int i; while ( i!=SQLITE_DONE ) { i = sqlite3_step( stmt ); switch( i ) { case SQLITE_DONE : { /* then the column was added so you implicitly know the count has changed : */ cc = sqlite3_column_count(stmt); break; } default : { std::cout << "(EE) " << i << " not expected!" << std::endl; /*...*/ } } } also I may have wrong but for me you are mixing `sqlite3_exec` and `sqlite3_prepare_v2`. For my your strategy is wrong. regards, nicolas
