EXC_BAD_ACCESS on inserting - sqlite

Question

I'm using FMDatabase to operate on an sqlite3 database. Here's my code:
NSString *dbFilePath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0] stringByAppendingPathComponent:[NSString stringWithFormat:#"temp_info.db"]];
FMDatabase *fmdb = [FMDatabase databaseWithPath:dbFilePath];
if (![fmdb open]) {
NSLog(#"......");
} else {
NSString *sql = #"CREATE TABLE IF NOT EXISTS test1(id INTEGER, name TEXT, create_time TEXT)";
if (![fmdb executeUpdate:sql]) {
NSLog(#"......");
}
for (int i = 0; i < 3; i++) {
BOOL result = [fmdb executeUpdate:#"INSERT INTO test1(id, name, create_time) values(?,?,?)", i+1, #"test", #"12-09-10 12:10"];
NSLog(#"%d", result);
}
// EXC_BAD_ACCESS
}
When I run the line:
BOOL result = [fmdb executeUpdate:#"INSERT INTO test1(id, name, create_time) values(?,?,?)", i+1, #"test", #"12-09-10 12:10"];
I get an EXC_BAD_ACCESS error. Why?

Answer 1

question has been solved!
*1.*All arguments provided to the -executeUpdate: method(or any of the variants that accept a va_list as a parameter) must be objects.The following will be not work (and will result in a crash):
[db executeUpdate:#"INSERT INTO mytable VALUES (?)", 66];
The proper way to insert a number is to box it in an NSNumber object:
[db executeUpdate:#"INSERT INTO mytable VALUES (?)", [NSNumber numberWithInt:66]];
*2.*Alternatively,you can use the -execute*WithFormat: variant to use NSString-style substitution:
[db executeUpdateWithFormat:#"INSERT INTO mytable VALUES (%d)", 66];
Internally,the -execute*WithFormat: methods are properly boxing things for you.The following percent modifiers are recognized:%#,%c,%s,%d,%D,%i,%u,%U,%hi,%hu,%qi,%qu,%f,%ld,%lu,%lld,and %llu.Using a modifier other than those will have unpredictable results.If,for some reason,you need the % character to appear in your SQL statement,you should use %%.