Release Notes for MariaDB Connector/J 3.1.3
MariaDB Connector/J is a lightweight JDBC driver (Type 4) for building applications on top of MariaDB database products with Java 8, Java 11, and Java 17.
This release is compatible with JDBC 4.2.
MariaDB Connector/J 3.1.3 was released on 2023-03-22. This release is of General Availability (GA) maturity.
When a custom credential plugin is implemented using the
CredentialPlugininterface, a race condition can cause connection failures to occur in multi-threaded environments. (CONJ-1054)
In previous releases of Connector/J 3.0 and 3.1, multiple threads could try to use the same static
ServiceLoader<CredentialPlugin>instance to load multiple
CredentialPlugininstances, which would cause a race condition between threads.
Starting with this release, when a thread tries to load a
CredentialPlugininstance, the thread dynamically creates a new
ServiceLoader<CredentialPlugin>instance for its own use, so that multiple threads do not use the same instance.
When a TLS plugin is implemented using the
TlsSocketPlugininterface, a race condition can cause errors to occur. (CONJ-1054)
In previous releases, the current thread's class loader was used to load
TlsSocketPlugininstances, which would cause errors like the following to occur in some threads:
Client has not found any TLS factory plugin with name 'NAME'
Starting with this release, Connector/J's internal class loader is used to load
DatabaseMetadata.getTypeInfo()method is used to return data type metadata, an incorrect value is returned for the
In previous releases, the
UNSIGNED_ATTRIBUTEcolumn is always
Starting with this release, the
UNSIGNED_ATTRIBUTEcolumn is only
truewhen a numeric column is defined with the
When connected to a Unix domain socket, Connector/J reads incorrect data when the packet size is greater than 32K. (CONJ-1056)
With the binary protocol, when a
TIMEcolumns has value
00:00:00, the value is not correctly decoded. (CONJ-1057)
org.mariadb.jdbc.Statementclass does not implement the various quote-related methods from the JDBC 4.3 API. (CONJ-1058)
In previous releases of Connector/J 3.0 and 3.1, the JDBC API's default quote-related methods are used, which can result in the wrong quotation characters being used.
Starting with this release, the following quote-related methods are implemented for the
String enquoteLiteral(String val)
String enquoteIdentifier(String identifier, boolean alwaysQuote)
String enquoteNCharLiteral(String val)
boolean isSimpleIdentifier(String identifier)
BIT(1)column is queried and the
transformedBitIsBooleanparameter is disabled, Connector/J sets the default column metadata to