On Thursday, 28 July 2016 at 14:33:26 UTC, Dechcaudron wrote:
On Thursday, 28 July 2016 at 14:01:45 UTC, Suliman wrote:
2. Should I call destructor and how it's should like?
You certainly want to close the connection to the db.
Basically, the destructor is intended to free resources such as
dynamic memory, closing connections... the GC will take care of
dynamic memory, but closing the connection to the DB is up to
you. So do that in the destructor.
No! Never run important finalization in a class destructor! The
GC is not obliged to run the destructors, so you may end up with
your objects destroyed but the connections still open. For this
kind of important things, you have to do them manually.
This is true of all major programming languages: JDBC (Java DB
framework, one of the most used in the world) requires calling
explicit methods to close connections, statements and result
sets, because the GC cannot be relied upon. The same goes for C#
sql library.
