Sqlite3 database is not executing a query - ios

Question

I am developing an iPhone app in Xcode, I am unable to access the database I have created. Following is the code where I am creating my database
//create local database
NSString *docsDir;
NSArray *dirPaths;
sqlite3 *localDB;
// Get the documents directory
dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
docsDir = [dirPaths objectAtIndex:0];
// Build the path to the database file
databasePath = [[NSString alloc] initWithString: [docsDir stringByAppendingPathComponent: #"local.db"]];
NSFileManager *filemgr = [NSFileManager defaultManager];
if ([filemgr fileExistsAtPath: databasePath ] == NO) {
const char *dbpath = [databasePath UTF8String];
if (sqlite3_open(dbpath, &localDB) == SQLITE_OK) {
char *errMsg;
const char *sql_stmt1 = "CREATE TABLE IF NOT EXISTS My_choices (perfume_id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT, na TEXT, got_it TEXT)";
const char *sql_stmt2 = "CREATE TABLE IF NOT EXISTS Ratings (perfume_id INTEGER PRIMARY KEY AUTOINCREMENT, rating NUMERIC)";
const char *sql_stmt3 = "CREATE TABLE IF NOT EXISTS Consultant_Details (_id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT,website TEXT,domain TEXT,domain_no NUMERIC,phone TEXT,facebook TEXT)";
if (sqlite3_exec(localDB, sql_stmt1, NULL, NULL, &errMsg) != SQLITE_OK) {
NSLog(#"%#",#"Failed to create table My_choices");
}
if (sqlite3_exec(localDB, sql_stmt2, NULL, NULL, &errMsg) != SQLITE_OK) {
NSLog(#"%#",#"Failed to create table ratings");
}
if (sqlite3_exec(localDB, sql_stmt3, NULL, NULL, &errMsg) != SQLITE_OK) {
NSLog(#"%#",#"Failed to create table Consultant_Details");
}
sqlite3_close(localDB);
}
else {
NSLog(#"%#",#"Failed to open/create database");
}
}
add below is the code where I am trying to access it
NSString *docsDir;
NSArray *dirPaths;
sqlite3 *localDB;
// Get the documents directory
dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
docsDir = [dirPaths objectAtIndex:0];
// Build the path to the database file
NSString *dbPath = [[NSString alloc] initWithString: [docsDir stringByAppendingPathComponent: #"local.db"]];
NSString *q = #"select * from Ratings where perfume_id in";
q = [q stringByAppendingString:idList];
NSLog(#"%#",q);
const char *sqlStatement2 = [q UTF8String];
sqlite3_stmt *compiledStatement2;
if(sqlite3_open([dbPath UTF8String], &localDB) == SQLITE_OK) {
if(sqlite3_prepare_v2(localDB, sqlStatement2, -1, &compiledStatement2, NULL) == SQLITE_OK) {
NSLog(#"%d", SQLITE_ROW);
// Loop through the results and add them to the feeds array
while(sqlite3_step(compiledStatement2) == SQLITE_ROW) {
// Read the data from the result row
int r = sqlite3_column_int(compiledStatement2, 1);
int id = sqlite3_column_int(compiledStatement2, 0);
NSLog(#"%d", id);
for (ListItem *item in self.listItemArray) {
if(item.perfumeId == id){
item.rating = r;
}
}
}
}
else{
NSLog(#"query failed: %s", sqlite3_errmsg(localDB));
}
}
sqlite3_close(localDB);
I always get "query failed No such table exists:Ratings" in my log.
Any help will be appreciated.

Answer 1

Basically this error occured due to unavailabilty of Table in database or wrong query. According to your post, IT look like a error in query.
Query should be something like this:
NSString *q = #"select * from Ratings where perfume_id in ('12','13','14','15')";
Print your "String q" and make sure it follow as above.

Answer 2

Thanks everyone for your help.The database file with the same already existed at that path. So my first method where I was creating a database
if ([filemgr fileExistsAtPath: databasePath ] == NO) check was false and tables were not created.

Answer 3

first remove database file from document directory then use following code to create a sqlite table..
if (![fileManager fileExistsAtPath: _databasePath ])
{
const char *dbpath = [_databasePath UTF8String];
if (sqlite3_open(dbpath, &_myDataBase) == SQLITE_OK)
{
char *errMsg;
const char *sql_stmt =
"CREATE TABLE IF NOT EXISTS My_choices (perfume_id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT, na TEXT, got_it TEXT);" //TEST
"CREATE TABLE IF NOT EXISTS Ratings (perfume_id INTEGER PRIMARY KEY AUTOINCREMENT, rating NUMERIC);" //USER
"CREATE TABLE IF NOT EXISTS Consultant_Details (_id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT,website TEXT,domain TEXT,domain_no NUMERIC,phone TEXT,facebook TEXT)"; //METADATA
if (sqlite3_exec(_myDataBase, sql_stmt, NULL, NULL, &errMsg) != SQLITE_OK)
{
NSLog(#"Failed to create tables");
}
sqlite3_close(_myDataBase);
NSLog(#"DataBase created at: %#",_databasePath);
} else {
NSLog(#"Failed to open/create database");
}
}