SelectResultSet's (ResultSet)MetaData always indicates all columns to be readonly

org.mariadb.jdbc.internal.com.read.resultset.SelectResultSet#getMetadata always returns a MariaDbResultSetMetaData which is not updatable, which results in isReadOnly(int column) to always return true

JDBC state that https://docs.oracle.com/en/java/javase/11/docs/api/java.sql/java/sql/ResultSetMetaData.html#isReadOnly(int) Indicates whether the designated column is definitely not writable. Driver indicate that resultset not an updatable resultset and all its columns are readOnly.

Instead only effectively readOnly-columns should return true

PS: discussion leading to this Issue https://lists.launchpad.net/maria-discuss/msg05864.html