How to update a string property of an sqlite database item
- by Thomas Joos
hi all,
I'm trying to write an application that checks if there is an active internet connection. If so it reads an xml and checks every 'lastupdated' item ( php generated string ). It compares it to the database items and if there is a new value, this particular item needs to be updated.
My code seems to work ( compiles, no error messages, no failures, .. ) but I notice that the particular property does not change, it becomese (null). When I output the binded string value it returns the correct string value I want to update into the db..
Any idea what I'm doing wrong?
const char *sql = "update myTable Set last_updated=? Where node_id =?";
sqlite3_stmt *statement;
// 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.
if (sqlite3_prepare_v2(database, sql, -1, &statement, NULL) == SQLITE_OK){
NSLog(@"last updated item: %@", [d lastupdated]);
sqlite3_bind_text(statement, 1, [d lastupdated],-1,SQLITE_TRANSIENT);
sqlite3_bind_int (statement, 2, [d node_id]);
}else {
NSLog(@"SQLite statement error!");
}
if(SQLITE_DONE != sqlite3_step(statement)){
NSAssert1(0, @"Error while updating. '%s'", sqlite3_errmsg(database));
}else {
NSLog(@"SQLite Update done!");
}
