SQLite database deleted all the tables [closed] - ios

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I am calling this function and removes all the data first and then insert the updated values in it. but some how all the tables are removed from database.it always shows the alertview from the code.not sure what i am dong wrong.any help will be appereciated. Thank you..
-(void)fillDate
{
filemgr=[NSFileManager defaultManager];
NSString *querySQL = #"delete from getdate";
const char *dbpath = [[appDelegate getDBPath] UTF8String];
//NSLog(#"path= %#",dbpath);
BOOL flag=FALSE;
if (sqlite3_open(dbpath, &dtdb) == SQLITE_OK)
{
//"open";
const char *query_stmt = [querySQL UTF8String];
sqlite3_prepare_v2(dtdb,query_stmt,-1,&statement,NULL);
if (sqlite3_step(statement)==SQLITE_DONE)
{
//table deleted
flag=TRUE;
}
else
{
UIAlertView *d=[[UIAlertView alloc]initWithTitle:#"Message" message:#"Your Table does not deleted" delegate:self cancelButtonTitle:#"ok" otherButtonTitles: nil];
[d show];
flag=FALSE;
}
}
else
{
//"can't open";
}
sqlite3_close(dtdb);
sqlite3_finalize(statement);
if (flag)
{
sqlite3_stmt *stmt;
const char *cdbpath=[[appDelegate getDBPath] UTF8String];
if ((sqlite3_open(cdbpath,&dtdb)==SQLITE_OK))
{
char* errorMessage;
sqlite3_exec(dtdb, "BEGIN TRANSACTION", NULL, NULL, &errorMessage);
char buffer[] = "INSERT INTO getdate(lastdate) VALUES (?1)";
sqlite3_prepare_v2(dtdb, buffer, strlen(buffer), &stmt, NULL);
// for (unsigned i = 0; i < 1; i++)
// {
// NSMutableDictionary *dict=[arrayAllEvents objectAtIndex:i];
//NSLog(#"dict:%#",dict);
sqlite3_bind_text(stmt, 1, [[df stringFromDate:[NSDate date]]UTF8String], -1, SQLITE_STATIC);
int success = sqlite3_step(stmt);
sqlite3_reset(stmt);
if (success != SQLITE_DONE)
{
//nslog(#"error: %s",sqlite3_errmsg(dtdb));
}
//nslog(#"... data created.");
// }///for
if(sqlite3_exec(dtdb, "COMMIT TRANSACTION", NULL, NULL, &errorMessage)==SQLITE_OK)
{
NSLog(#"commited Events");
}
else
{
NSLog(#"Not commited");
}
// sqlite3_exec(dtdb, "COMMIT TRANSACTION", NULL, NULL, &errorMessage);
sqlite3_finalize(stmt);
}//
}
sqlite3_close(dtdb);
}

Answer 1

if you have updated your database then just replace the new database with old one.delete the app and run again. your code seem to be perfect.