iPHONE SDK- sqlite , how do i do an insert statement - iphone

Question

i have a database that is in the documents directorys of the
Application/iPhoneSimulator/3.2/Applications/etc/Documents
I have this code under my method
databaseName = #"database.sql";
NSArray *documentsPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory.NSUserDomainMask,YES);
NSString *documentsDir = [documentPaths objectAtIndex:0];
databasePath = [documentsDir stringByAppendingPathComponent:databaseName];
How do i do an insert with a variable/ array .
Something like
"INSERT INTO TABLE (COLUMN) VALUES ('%#'),[appDelegate.variable objectAtIndex:0];

Answer 1

I insist you to go through this question.
First of all copy the database from main bundle to your application's document dir.
You can follow below code to implement it.
NSString *databaseFile=[[NSBundle mainBundle] pathForResource:kDataBaseName ofType:kDataBaseExt];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *basePath = ([paths count] > 0) ? [paths objectAtIndex:0] : nil;
NSString *dbPath=[basePath stringByAppendingPathComponent:[NSString stringWithFormat:#"%#.%#",kDataBaseName,kDataBaseExt]];
NSFileManager *fm=[NSFileManager defaultManager];
if(![fm fileExistsAtPath:dbPath]){
[fm copyItemAtPath:databaseFile toPath:dbPath error:nil];
}
[fm release];
self.dataBasePath=dbPath;
I am supplying you directly my project code. Please add comment if any doubts.
I have added comments for the explanation.
// function with multiple arguments which is going to be used for inserting into table.
+(void)insertBuilding:(NSString*)BName streetNo:(NSInteger)streetNo streetName:(NSString*)streetName streetDir:(NSString*)streetDir muni:(NSString*)muni province:(NSString*)province bAccess:(NSString*)bAccess bType:(NSString*)bType amnity:(NSString*)amnity latitude:(NSString*)latitude longitude:(NSString*)longitude imageName:(NSString*)imageName {
// application delegate where I have saved my database path.
BuildingLocatorAppDelegate *x=(BuildingLocatorAppDelegate *)[[UIApplication sharedApplication]delegate];
sqlite3 *database; // database pointer
// verifying if database successfully opened from path or not.
// you must open database for executing insert query
// i have supplied database path in argument
// opened database address will be assigned to database pointer.
if(sqlite3_open([[x dataBasePath] UTF8String],&database) == SQLITE_OK) {
// creating a simple insert query string with arguments.
NSString *str=[NSString stringWithFormat:#"insert into buildingDtl(b_name,streetNo,streetName,streetDir,muni,province,b_access,b_type,aminity,latitude,longitude,b_image) values('%#',%i,'%#','%#','%#','%#','%#','%#','%#','%#','%#','%#')",BName,streetNo,streetName,streetDir,muni,province,bAccess,bType,amnity,latitude,longitude,imageName];
// converting query to UTF8string.
const char *sqlStmt=[str UTF8String];
sqlite3_stmt *cmp_sqlStmt;
// preparing for execution of statement.
if(sqlite3_prepare_v2(database, sqlStmt, -1, &cmp_sqlStmt, NULL)==SQLITE_OK) {
int returnValue = sqlite3_prepare_v2(database, sqlStmt, -1, &cmp_sqlStmt, NULL);
((returnValue==SQLITE_OK) ? NSLog(#"Success") : NSLog(#"UnSuccess") );
// if NSLog -> unsuccess - that means - there is some problem with insert query.
sqlite3_step(cmp_sqlStmt);
}
sqlite3_finalize(cmp_sqlStmt);
}
sqlite3_close(database);
// please don't forget to close database.
}

Answer 2

+(NSString *)stringWithFormat:(NSString *)format parameters:...];
NSString sql = [NSString stringWithFormat:#"INSERT INTO table VALUES('%#')", #"Hello, world!"];
sqlite3_....

Answer 3

Use either prepared statements in combination with the bind_*() functions (e.g. bind_text()) or the mprintf() function to insert strings, see this question for details.
To get a raw C-string you can pass to these functions use -UTF8String or -cStringUsingEncoding: on a NSString.