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Derby exception messages and SQL states
The JDBC driver returns SQLExceptions for all errors from Derby. If the exception originated
in a user type but is not itself an SQLException, it is wrapped in
an SQLException. Derby-specific SQLExceptions
use SQLState class codes starting with X. Standard SQLState values
are returned for exceptions where appropriate.
Unimplemented aspects of the JDBC driver return a SQLException with
a SQLState starting with 0A. If your
application runs on JDK 1.6 or higher, then the exception class is
java.sql.SQLFeatureNotSupportedException.
These unimplemented parts are for features not supported by Derby.
Derby supplies
values for the message and SQLState fields. In addition, Derby sometimes
returns multiple SQLExceptions using the nextException chain.
The first exception is always the most severe exception, with SQL-92 Standard
exceptions preceding those that are specific to Derby.
For information on processing SQLExceptions, see the Derby Developer's Guide.
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