SQL error or database missing

Question

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:@"bookdb.sql"];
// Open the database. The database was prepared outside the application.
//int retcode =sqlite3_open([path UTF8String], &database);
if (sqlite3_open([path UTF8String], &database) == SQLITE_OK)
// Get the primary key for all arrContacts.
const char *chRecordIdQuery ="SELECT pk FROM book";
sqlite3_stmt *sqlStatement;
// Preparing a statement compiles the SQL query into a byte-code program in the SQLite library.
// The third parameter is either the length of the SQL string or -1 to read up to the first null terminator.
int retcode = sqlite3preparev2(database, chRecordIdQuery, -1, &sqlStatement, NULL);
if (sqlite3preparev2(database, chRecordIdQuery, -1, &sqlStatement, NULL) == SQLITE_OK)
// We "step" through the results - once for each row.
while (sqlite3_step(sqlStatement) == SQLITE_ROW)
// The second parameter indicates the column index into the result set.
int primaryKey = sqlite3columnint(sqlStatement, 0);
// We avoid the alloc-init-autorelease pattern here because we are in a tight loop and
// autorelease is slightly more expensive than release. This design choice has nothing to do with
// actual memory management - at the end of this block of code, all the book objects allocated
// here will be in memory regardless of whether we use autorelease or release, because they are
// retained by the arrContacts array.
[self fetchContacts:primaryKey];
[arrContacts addObject:ContactName];
// "Finalize" the statement - releases the resources associated with the statement.
sqlite3_finalize(sqlStatement);
else
// Even though the open failed, call close to properly clean up resources.
sqlite3_close(database);
NSAssert1(0, @"Failed to open database with message '%s'.", sqlite3_errmsg(database));
// Additional error handling, as appropriate...
When I execute this code den the sqlite_open commands works properly , it means it can find the database and opens it but it returns error om this line
"if (sqlite3preparev2(database, chRecordIdQuery, -1, &sqlStatement, NULL) == SQLITE_OK)"
the value of int retcode = sqlite3preparev2(database, chRecordIdQuery, -1, &sqlStatement, NULL); is returned as 1 which says - SQL error or database missing .
Also , previously I used the same code in other project and there it ran succesfully.
I could not find out what is happening.
can anyone help me out ?

Answer 1

Try wrapping code that you submit to the forum in a pair (no slashes). It makes it much easier to read.
It is hard to say what the problem is without knowing what your db file actually looks like. Given that you've had success with this code before you might double check the db file that is in the simulator's sandbox for your application. You can go to your <username>/Library/ApplicationSupport/iPhone Simulator/User/Applications/<appropriate directory for your app>/Documents and your should see the db file that you are trying to select from.
You can check to see that it actually contains the schema and data that you expect with the command line tool: sqlite3. Run sqlite3 on you db file and then enter .dump. That will print the contents of your tables in the db.
In my experience, a problem with the "prepare" call is generally related to a mismatch between your SQL statement and the actual db's schema.
It may not help, but it is worth looking if you haven't yet.
Cheers,
Greg