I have seen both Option=3
and Option=4
in connection string samples for MySQL ODBC but no explanation or documentation. What do those numbers mean?
String. The ODBC driver connection string that includes settings, such as the data source name, needed to establish the initial connection. The default value is an empty string (""). The maximum length is 1024 characters.
A connection string is a sequence of variables which will address the specific database and allow you to connect your code to your MySQL database.
The Option=
value is the sum of the numeric values for various flags that specify how Connector/ODBC should work. Its default value is 0.
From an older version of the Connector/ODBC documentation at web.archive.org:
Option=3;
corresponded to FLAG_FIELD_LENGTH
(1) + FLAG_FOUND_ROWS
(2)
Option=4;
was FLAG_DEBUG
According to the current list of Connector/ODBC options here ...
Table 5.2 Connector/ODBC Option Parameters
... both FLAG_FIELD_LENGTH
(1) and FLAG_DEBUG
(4) have been removed.
MySQL also recommends using the parameter names instead of (the sum of) their numeric values, not only for clarity, but because not all options have numeric values. So, instead of
Option=2;
we should use
FOUND_ROWS=1;
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With