I wanna ask about my function below.
It print NOT AVAILABLE when I call this function.
Could you help me please??
static sqlite3 *database = nil;
static sqlite3_stmt *statement = nil;
- (BOOL) findNews:(NSString *)caption{
const char *dbpath = [databasePath UTF8String];
if (sqlite3_open(dbpath, &database) == SQLITE_OK)
{
NSLog(#"CAPTION ID : %#", caption);
NSString *querySQL = [NSString stringWithFormat:#"SELECT * FROM dbase WHERE CONTENT_ID = \"%#\"", caption];
const char *query_stmt = [querySQL UTF8String];
if (sqlite3_prepare_v2(database, query_stmt, -1, &statement, NULL) == SQLITE_OK)
{
if (sqlite3_step(statement) == SQLITE_ROW)
{
return YES;
}
else{
return NO;
}
sqlite3_reset(statement);
}else{
NSLog(#"NOT AVAILABLE");
}
}
return nil;
}
There are some reason for due to which the sqlite3_prepare_v2 != SQLITE_OK :
The table may not present into the database.
Wrong query statement .
Wrong column name into the query statement.
You can find the exact problem using error statement by putting following in else:
NSAssert1(0, #"Error while inserting data. '%s'", sqlite3_errmsg(database))
sqlite3 open. "If the filename is an empty string, then a private, temporary on-disk database will be created. This private database will be automatically deleted as soon as the database connection is closed."
So the sqlite3_open will return SQLITE_OK, if the data base not copied into Documents directory. You should copy the data into Bundle and copy this data base to Documents directory.
-(void) checkAndCreateDatabase{
BOOL success;
NSFileManager *fileManager = [NSFileManager defaultManager];
success = [fileManager fileExistsAtPath:databasePath];
if(success) return;
NSString *databasePathFromApp = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:#"mydb.sqlite"];
[fileManager copyItemAtPath:databasePathFromApp toPath:databasePath error:nil];
}
Related
I had used sqlite DB for my application and i need to call the two simultaneous queries, but i giving error as : Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'error preparing statement'
I am running a timer of every 10 seconds for Selecting rows from DB and Insert rows in DB after a button event.
My code snippet as:
in viewWillAppear:
int result2 = sqlite3_open([dbPath UTF8String], &database);
if (result2 != SQLITE_OK) {
NSLog(#"Failure in connecting to the database with result %d",result2);
}
else {
NSLog(# "Succesfully opened connection to DB") ;
}
and in viewWillDisappear:
int result = sqlite3_close(database);
if (result != SQLITE_OK){
NSLog(#"Failure in closing connection to database. Result %d",result);
}
else {
NSLog(#"Successfully closed DB connection") ;
}
For Inserting rows:
NSString *queryInsert = [NSString stringWithFormat: #"insert into mail_snoozlist (msgBody,msgSubject, msgSender,msgTo,msgDate,snoozTime) values('%#','%#','%#','%#','%#','%#')",strBody,msgSub,msgFrom,msgTo,strMsgDate,stringFromDate];
NSLog(#"queryInsert:%#",queryInsert);
const char *sql = [queryInsert UTF8String];
if(sqlite3_prepare_v2(database, sql, -1, &statement, NULL) == SQLITE_OK) {
sqlite3_step(statement);
sqlite3_reset(statement);
} else {
NSAssert1(0,#"error preparing statement",sqlite3_errmsg(database));
return;
}
sqlite3_finalize(statement);
and for Selecting rows:
NSString *querySQL2 = [NSString stringWithFormat: #"Select * from mail_snoozlist WHERE snoozTime = '%#'",_snoozTime];
NSLog(#"querySql:%#",querySQL2);
if (sqlite3_prepare_v2(database, [querySQL2 UTF8String], -1, &statement, NULL) == SQLITE_OK)
{
while (sqlite3_step(statement) == SQLITE_ROW)
{
Message *obj = [[Message alloc] init];
NSString *msgBody=[[NSString alloc] initWithUTF8String:(const char *) sqlite3_column_text(statement, 1)];
obj.msgBody= msgBody;
NSString *msgSub=[[NSString alloc] initWithUTF8String:(const char *) sqlite3_column_text(statement, 2)];
obj.msgSub= msgSub;
NSString *msgSender=[[NSString alloc] initWithUTF8String:(const char *) sqlite3_column_text(statement, 3)];
obj.msgFrom= msgSender;
NSString *msgTo=[[NSString alloc] initWithUTF8String:(const char *) sqlite3_column_text(statement, 4)];
obj.msgTo= msgTo;
NSString *msgDate=[[NSString alloc] initWithUTF8String:(const char *) sqlite3_column_text(statement, 5)];
obj.msgDate= msgDate;
[listOfItems addObject:obj];
[self.tableView reloadData];
}
sqlite3_reset(statement);
sqlite3_finalize(statement);
Anyone please help me to solve this problem.
Thanks!
You should change your NSAssert statement to include the error message:
NSAssert1(0, #"error preparing statement: %s", sqlite3_errmsg(database));
Once you do that, you should get a meaningful response which will help you diagnose the problem.
Without looking at the sqlite3_errmsg message, it is difficult to diagnose the problem. It could be as simple as a typo in a column name or table name or as complicated as the table not being found because the database wasn't found when it was created, so a blank database (without that table) was created. Hard to say until we see the error message.
As an aside, you should not be building your SQL with stringWithFormat because you open yourself to SQL injection attacks as well as will have problems if any of those text values have an apostrophe in them. You should use ? placeholders instead of printf-style formatters, and then bind the values to those columns with sqlite3_bind_text calls:
NSString *queryInsert = #"insert into mail_snoozlist (msgBody,msgSubject, msgSender,msgTo,msgDate,snoozTime) values(?, ?, ?, ?, ?, ?)";
if (sqlite3_prepare_v2(database, sql, -1, &statement, NULL) != SQLITE_OK) {
NSAssert1(0,#"error preparing statement: %s",sqlite3_errmsg(database));
return;
}
// for these 6 sqlite3_bind function calls, if any of these strings can be `nil`, then you'd
// want to call sqlite3_bind_null if that's the case, rather than sqlite3_bind_text
if (sqlite3_bind_text(statement, 1, [strBody UTF8String], -1, NULL) != SQLITE_OK) {
NSAssert1(0,#"error binding 1: %s",sqlite3_errmsg(database));
sqlite3_finalize(statement);
return;
}
if (sqlite3_bind_text(statement, 2, [msgSub UTF8String], -1, NULL) != SQLITE_OK) {
NSAssert1(0,#"error binding 2: %s",sqlite3_errmsg(database));
sqlite3_finalize(statement);
return;
}
if (sqlite3_bind_text(statement, 3, [msgFrom UTF8String], -1, NULL) != SQLITE_OK) {
NSAssert1(0,#"error binding 3: %s",sqlite3_errmsg(database));
sqlite3_finalize(statement);
return;
}
if (sqlite3_bind_text(statement, 4, [msgTo UTF8String], -1, NULL) != SQLITE_OK) {
NSAssert1(0,#"error binding 4: %s",sqlite3_errmsg(database));
sqlite3_finalize(statement);
return;
}
if (sqlite3_bind_text(statement, 5, [strMsgDate UTF8String], -1, NULL) != SQLITE_OK) {
NSAssert1(0,#"error binding 5: %s",sqlite3_errmsg(database));
sqlite3_finalize(statement);
return;
}
if (sqlite3_bind_text(statement, 6, [stringFromDate UTF8String], -1, NULL) != SQLITE_OK) {
NSAssert1(0,#"error binding 6: %s",sqlite3_errmsg(database));
sqlite3_finalize(statement);
return;
}
if (sqlite3_step(statement) != SQLITE_DONE) {
NSAssert1(0,#"error stepping: %s",sqlite3_errmsg(database));
}
sqlite3_finalize(statement);
I illustrate the issue with the insert statement, but the same should be done with the select statement, too.
Add these two methods and call them in insert method before insertion and selection,
- (void) createEditableCopyOfDatabaseIfNeeded
{
BOOL success;
NSFileManager *fileManager = [NSFileManager defaultManager];
NSError *error;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *writableDBPath = [documentsDirectory stringByAppendingPathComponent:#"dbname.sqlite"];
success = [fileManager fileExistsAtPath:writableDBPath];
if (success) return;
//{
NSString *defaultDBPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:#"dbname.sqlite"];
success = [fileManager copyItemAtPath:defaultDBPath toPath:writableDBPath error:&error];
// }
if (!success)
{
NSAssert1(0, #"Failed to create writable database file with message '%#'.", [error localizedDescription]);
}
}
- (void)initializeDatabase
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:#"dbname.sqlite"];
sqlite3_open([path UTF8String], &database);
}
I am trying out SQLite in iPhone for the very first time. The error I am facing is that the statement sqlite3_prepare_v2(database, sql, -1, &selectstmt, NULL) == SQLITE_OK in th ecode below is returning false and nothing is displayed.
Below is my code:
+ (void) getInitialDataToDisplay:(NSString *)dbPath {
dbTryAppDelegate *appDelegate = (dbTryAppDelegate *)[[UIApplication sharedApplication] delegate];
if (sqlite3_open([dbPath UTF8String], &database) == SQLITE_OK) {
const char *sql = "select name,id from studtry";
sqlite3_stmt *selectstmt;
//below line is never executed and its else part is also not executed.
if(sqlite3_prepare_v2(database, sql, -1, &selectstmt, NULL) == SQLITE_OK) {
while(sqlite3_step(selectstmt) == SQLITE_ROW) {
NSInteger primaryKey = sqlite3_column_int(selectstmt, 0);
stud *coffeeObj = [[stud alloc] initWithPrimaryKey:primaryKey];
coffeeObj.studName = [NSString stringWithUTF8String:(char *)sqlite3_column_text(selectstmt, 0)];
//coffeeObj.isDirty = NO;
[appDelegate.studArray addObject:coffeeObj];
// [coffeeObj release];
}
}
}
else
sqlite3_close(database); //Even though the open call failed, close the database connection to release all the memory.
}
Where am I getting wrong? How do I solve it?
Check Database Path, Database extension and also same table & fields.
Anyways,
Use This instead of using directly const string::
NSString *sqlStr = [NSString stringWithFormat:#"select name,id from studtry"];
const char *sql = [sqlStr UTF8String];
After while loop finalize statement,
sqlite3_finalize(selectstmt);
Then, after If condition,
sqlite3_close(database);
No need to write in else part.
Hopefully, it'll work for you.
Thanks.
First delete your application from Application & Simulator Folder.
Then create Database named :: Practise.sqlite3 (Type of SQLite3)
Then write this methods for Copying:
- (void) copyDatabaseIfNeeded {
NSFileManager *fileManager = [NSFileManager defaultManager];
NSError *error;
dbPath = [self getDBPath];
BOOL success = [fileManager fileExistsAtPath:dbPath];
if(!success) {
NSString *defaultDBPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:#"Practise.sqlite3"];
success = [fileManager copyItemAtPath:defaultDBPath toPath:dbPath error:&error];
if (!success)
NSAssert1(0, #"Failed to create writable database file with message '%#'.", [error localizedDescription]);
}
}
- (NSString *) getDBPath {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
NSString *documentsDir = [paths objectAtIndex:0];
return [documentsDir stringByAppendingPathComponent:#"Practise.sqlite3"];
}
You can copy this whenever you want by,
[self copyDatabaseIfNeeded];
Then, check for your results. Hopefully it'll work.
As per your code, all thing is abs right but I think you are passing the wrong DBPath or maybe DB file is not on the right place
please check this both point and try again.
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory , NSUserDomainMask, YES);
NSString *documentsDir = [paths objectAtIndex:0];
NSFileManager *fileManager = [NSFileManager defaultManager];
NSError *error;
NSString *dbPath =[documentsDir stringByAppendingPathComponent:#"register.sqlite"];
BOOL success = [fileManager fileExistsAtPath:dbPath];
sqlite3_stmt *selectstmt;
if(!success)
{
NSString *defaultDBPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:#"register.sqlite"];
success = [fileManager copyItemAtPath:defaultDBPath toPath:dbPath error:&error];
if (!success)
NSAssert1(0, #"Failed to create writable database file with message '%#'.", [error localizedDescription]);
}
if (sqlite3_open([dbPath UTF8String], &database) == SQLITE_OK) {
sql = "select lastname,email,firstname from reg_FORM";
if(sqlite3_prepare_v2(database, sql, -1, &selectstmt, NULL) == SQLITE_OK) {
while(sqlite3_step(selectstmt) == SQLITE_ROW) {
lastname = [NSString stringWithUTF8String:(char *)sqlite3_column_text(selectstmt, 0)];
email=[NSString stringWithUTF8String:(char *)sqlite3_column_text(selectstmt, 1)];
firstname=[NSString stringWithUTF8String:(char *)sqlite3_column_text(selectstmt, 2)];
NSLog(#"----%#",lastname);
NSLog(#"----%#",email);
NSLog(#"----%#",firstname);
}
sqlite3_finalize(selectstmt);
}
sqlite3_close(database);
}
I am using this code to retrieve the values in db, but I did know how to insert data in db. I am trying this below code but it does not work
const char *sql = "insert into reg_FORM (firstname,lastname,email,company,phone) VALUES (aaa,aaa,aaa,aaaa,1223)";
sqlite3_exec(database, [[NSString stringWithFormat:#"insert into reg_FORM (firstname,lastname,email,company,phone) VALUES (aaa,aaa,aaa,aaaa,1223)"] UTF8String], NULL, NULL, NULL);
//give code for insert values in db
{
BOOL returnValue = YES;
sqlite3_stmt *insertStmt = nil;
sqlite3 *UserDB ;
if (sqlite3_config(SQLITE_CONFIG_SERIALIZED) == SQLITE_OK)
{
NSLog(#"Can now use sqlite on multiple threads, using the same connection");
}
int ret = sqlite3_enable_shared_cache(1);
if(ret != SQLITE_OK)
{
}
// Open the database. The database was prepared outside the application.
if (sqlite3_open([app.dataBasePath UTF8String], &UserDB) == SQLITE_OK)
{
if(insertStmt == nil)
{
NSString *strValue = [NSString stringWithFormat:#"insert into languagemaster Values(?,?)"];
const char *sql = [strValue UTF8String];
if(sqlite3_prepare_v2(UserDB, sql, -1, &insertStmt, NULL) != SQLITE_OK)
{
NSLog(#"Error while creating insertStmt in tblUserAccount %#", [NSString stringWithUTF8String:(char *)sqlite3_errmsg(UserDB)]);
returnValue = NO;
}
}
if(sqlite3_bind_int(insertStmt, 1, langid) ) // langid is int
{
return NO;
}
if(sqlite3_bind_text(insertStmt, 2, [strLanguageName UTF8String], -1, SQLITE_TRANSIENT) != SQLITE_OK) // strLanguageName is string
{
return NO;
}
if(SQLITE_DONE != sqlite3_step(insertStmt))
{
NSLog(#"Error while Executing insertStmt in tblLocation %#", [NSString stringWithUTF8String:(char *)sqlite3_errmsg(UserDB)]);
returnValue = NO;
}
sqlite3_reset(insertStmt);
if (insertStmt)
{
sqlite3_finalize(insertStmt);
insertStmt = nil;
}
}
sqlite3_close(UserDB);
return returnValue;
}
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory , NSUserDomainMask, YES);
NSString *documentsDir = [paths objectAtIndex:0];
NSFileManager *fileManager = [NSFileManager defaultManager];
NSError *error;
NSString *dbPath =[documentsDir stringByAppendingPathComponent:#"register.sqlite"];
BOOL success = [fileManager fileExistsAtPath:dbPath];
sqlite3_stmt *selectstmt;
if(!success)
{
NSString *defaultDBPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:#"register.sqlite"];
success = [fileManager copyItemAtPath:defaultDBPath toPath:dbPath error:&error];
if (!success)
NSAssert1(0, #"Failed to create writable database file with message '%#'.", [error localizedDescription]);
}
if (sqlite3_open([dbPath UTF8String], &database) == SQLITE_OK) {
const char *sql = "insert into reg_FORM (firstname,lastname,email,company,phone) VALUES ('sdcbb','bbbb','bbbb','bbbb',1111122)";
sqlite3_prepare_v2(database,sql, -1, &selectstmt, NULL);
if(sqlite3_step(selectstmt)==SQLITE_DONE)
{
NSLog(#"insert successfully");
}
else
{
NSLog(#"insert not successfully");
}
sqlite3_finalize(selectstmt);
sqlite3_close(database);
}
I made iPad application in which,
I want to insert record into database table, but I am unable to do the same.
here is my code snippet,
-(void) insertRecordIntoTableNamed: (NSString *) symbol{
NSString *sql = [NSString stringWithFormat:#"INSERT INTO recentquotes ('symbol', 'dt_tm') VALUES ('%#',datetime())",symbol];
NSLog(#"sql=%#",sql);
char *err;
if (sqlite3_exec(db, [sql UTF8String], NULL, NULL, &err) != SQLITE_OK)
{
sqlite3_close(db);
NSAssert(0, #"Error updating table.");
}
}
my NSLog shows:
sql=INSERT INTO recentquotes ('symbol', 'dt_tm') VALUES ('PATNI',datetime())
this statement is correct, but i am unable to see VALUES PATNI and datetime() in my database table
here is rest of the code,
NSString *filePahs = Nil;
-(NSString *) filePath {
filePahs=[[NSBundle mainBundle] pathForResource:#"companymaster" ofType:#"sql"];
NSLog(#"path=%#",filePahs);
return filePahs;
}
result of above method is:
path=/Users/krunal/Library/Application Support/iPhone Simulator/5.0/Applications/9FF61238-2D1D-4CB7-8E24-9AC7CE9415BC/iStock kotak.app/companymaster.sql
-(void) openDB {
//---create database---
if (sqlite3_open([[self filePath] UTF8String], &db) != SQLITE_OK )
{
sqlite3_close(db);
NSAssert(0, #"Database failed to open.");
}
}
-(void) getAllRowsFromTableNamed: (NSString *) tableName {
//---retrieve rows---
NSString *qsql = #"SELECT * FROM recentquotes";
sqlite3_stmt *statement;
if (sqlite3_prepare_v2( db, [qsql UTF8String], -1, &statement, nil) ==
SQLITE_OK) {
NSLog(#"b4 while");
while (sqlite3_step(statement) == SQLITE_ROW)
{
char *field1 = (char *) sqlite3_column_text(statement, 0);
NSString *field1Str = [[NSString alloc] initWithUTF8String: field1];
[recentqotarray addObject:field1Str];
[field1Str release];
}
//---deletes the compiled statement from memory---
sqlite3_finalize(statement);
NSLog(#"recentqotarray=%#",recentqotarray);
}
}
edit
i wrote this, and when i checked my log i got like this, "in find data" , i didn't got my sql=...
- (void) finddata
{
NSString *databasePath;
const char *dbpath = [databasePath UTF8String];
sqlite3_stmt *statement;
NSLog(#"in finddata");
if (sqlite3_open(dbpath, &db) == SQLITE_OK)
{
NSString *querySQL = [NSString stringWithFormat: #"SELECT * FROM recentquotes"];
NSLog(#"sql=%#",querySQL);
const char *query_stmt = [querySQL UTF8String];
if (sqlite3_prepare_v2(db, query_stmt, -1, &statement, NULL) == SQLITE_OK)
{
while (sqlite3_step(statement) == SQLITE_ROW)
{
NSLog(#"Inside recent quote table");
char *field1 = (char *) sqlite3_column_text(statement, 0);
NSLog(#"Column name=%s",field1);
NSString *field1Str = [[NSString alloc] initWithUTF8String: field1];
[recentqotarray addObject:field1Str];
NSLog(#"array=%#",recentqotarray);
}
sqlite3_finalize(statement);
}
sqlite3_close(db);
}
}
Thanks In Advance
In your:
NSString *sql = [NSString stringWithFormat:#"INSERT INTO recentquotes ('symbol', 'dt_tm') VALUES ('%#',datetime())",symbol];
Instead of '%#' try using \"%#\" , and check if it inserts into your db.
EDIT:
I've been working on DB a lot lately, and i've been able to successfully insert data in my sqlite, i'll write down what i use check if it helps:
NSArray*dirPath;
NSString*docDir;
dirPath=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
docDir=[dirPath objectAtIndex:0];
databasePath=[docDir stringByAppendingPathComponent:#"example.sqlite"];
BOOL success;
NSFileManager*fm=[NSFileManager defaultManager];
success=[fm fileExistsAtPath:databasePath];
if(success)
{
NSLog(#"Already present");
}
NSString*bundlePath=[[NSBundle mainBundle] pathForResource:#"example" ofType:#"sqlite"];
NSError*error;
success=[fm copyItemAtPath:bundlePath toPath:databasePath error:&error];
if(success)
{
NSLog(#"Created successfully");
}
const char*dbPath=[databasePath UTF8String];
if(sqlite3_open(dbPath, &myDB)==SQLITE_OK)
{
NSString*insertSQL=[NSString stringWithFormat:#"insert into extable (name) values (\"%#\")",[nametextField.text]];
const char*insertStmt=[insertSQL UTF8String];
char *errmsg=nil;
if(sqlite3_exec(myDB, insertStmt, NULL, NULL, &errmsg)==SQLITE_OK)
{
NSLog(#"ADDED!");
}
sqlite3_close(myDB);
}
I'm getting the same problem, one of stackoverflow which is:
if(sqlite3_open([dbPath UTF8String], &database) == SQLITE_OK)
{
//const char *sql ="select Username#'%#',Password#'%#' from userinformation";
NSString *sql = [[NSString alloc] initWithFormat:#"select * from UserInformation where UserName='%#' and Password='%#' ",Username.text,Password.text];
sqlite3_stmt *selectSatement;
// Here i am getting the problem.Im not sure why sqlite3_prepare_v2 ins't meeting SQLITE_OK
if( sqlite3_prepare_v2(database, [sql UTF8String], -1, &selectSatement, NULL) == SQLITE_OK)
{
//-------------------------------------
//Loop all the
NSString *user1 = [NSString stringWithUTF8String:(char *)sqlite3_column_text(selectSatement, 0)];
NSLog(#"%#",user1);
}
}
Any help with this is greatly appreciated.
First of all: if you open the database, you should also close it by using sqlite3_close(database)
I wrote in the code below an assert-statement, which will tell you, if something is wronmg with your query. Further on you might get an error, if your password or username is for some reason "nil", that's why I adapted the way you set the username and password a bit. If the value does not exist, its "0"
if(sqlite3_open([dbPath UTF8String], &database) == SQLITE_OK)
{
char *errorMsg;
NSString *sql = [[NSString alloc] initWithFormat: #"SELECT * FROM UserInformation WHERE UserName=\"%#\" and Password =\"%#\"", Username.text, Password.text];
if (sqlite3_exec (database, [sql UTF8String], NULL, NULL, &errorMsg) != SQLITE_OK)
{
sqlite3_close(database);
NSAssert1(0, #"Error selecting data: %s", sqlite3_errmsg(database));
}
else
{
NSString *user1 = [NSString stringWithUTF8String:((char *)sqlite3_column_text(compiledStatement, 0) ? (char *)sqlite3_column_text(compiledStatement, 0) : (char *)"0")];
NSString *password1 = [NSString stringWithUTF8String:((char *)sqlite3_column_text(compiledStatement, 1) ? (char *)sqlite3_column_text(compiledStatement, 1) : (char *)"0")];
NSLog(#"%#: %#",user1,password1);
}
[sql release];
}
sqlite3_close(database);
What you should also keep in mind is, that the database should exist at the intended path, by calling for example the following method
-(void) checkAndCreateDatabase
{
NSFileManager *fileManager = [NSFileManager defaultManager];
if([fileManager fileExistsAtPath:dbPath]) return;
NSString *databasePathFromApp = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:databaseName];
[fileManager copyItemAtPath:databasePathFromApp toPath:databasePath error:nil];
[fileManager release];
}
Check the query itself, print it in log and check it by copying it from log and executing directly in the database.