A strange anomaly.

A strange anomaly.

Java.sql.SQLException:Parameter metadata not available for the given statement.

This is generated when the database metadata is being tested, and the database is MySQL.
The workaround is not difficult, which is to add a metadata type that can be returned after the URL that is connected to the database
For example:
Out of the exception when my URL is written like this:
Url= "Jdbc:mysql://127.0.0.1:3306/demo?user=root&password=root&useunicode=true"
The correct wording should be:
url = "jdbc:mysql://127.0.0.1:3306/demo?user=root&password=root&useunicode=true& Generatesimpleparametermetadata=true "

After the change, the program runs normally!

A strange anomaly.