Question

If I want to add a NSString field to database I can do it by following way

sqlite3_bind_text(addStmt, 1, [PlaceName UTF8String], -1, SQLITE_TRANSIENT);

where, PlaceName is variable of type NSString inserted into column number 1. now If I want to add double field to database how can do it?

I tried following,

sqlite3_bind_double(addStmt, 4, [PlaceLongitude doubleValue]);

which gave error: Cannot convert to a pointer type.

Please help me. Thanks for any help, in advance.

Answer 1

Save double to DB
If PlaceLongitude is double, you can directly pass it to the method,

sqlite3_bind_double(addStmt, 4, PlaceLongitude);

The error Cannot convert to a pointer type is because you are trying to call a method on a primitive type (double).

Retrieve double from DB

NSString *longStr = [NSString stringWithUTF8String:(char *)sqlite3_column_text(selectstmt, 4)];
Place.PlaceLongitude = [longStr doubleValue];