roll back the connection used for creating the DatabaseConnectionInfoImpl

because it has autoCommit disabled, and this caused problems on Db2

Author: gavinking

hibernate-agroal/src/main/java/org/hibernate/agroal/internal/AgroalConnectionProvider.java

@@ -172,7 +172,7 @@ public DatabaseConnectionInfo getDatabaseConnectionInfo(Dialect dialect) {
 		final var poolConfig = agroalDataSource.getConfiguration().connectionPoolConfiguration();
 		final var connectionConfig = poolConfig.connectionFactoryConfiguration();
 		try ( var connection = agroalDataSource.getConnection() ) {
-			return new DatabaseConnectionInfoImpl(
+			final var info = new DatabaseConnectionInfoImpl(
 					AgroalConnectionProvider.class,
 					connectionConfig.jdbcUrl(),
 					// Attempt to resolve the driver name from the dialect,
@@ -196,6 +196,10 @@ public DatabaseConnectionInfo getDatabaseConnectionInfo(Dialect dialect) {
 					poolConfig.maxSize(),
 					getFetchSize( connection )
 			);
+			if ( !connection.getAutoCommit() ) {
+				connection.rollback();
+			}
+			return info;
 		}
 		catch (SQLException e) {
 			throw new JDBCConnectionException( "Could not create connection", e );

hibernate-c3p0/src/main/java/org/hibernate/c3p0/internal/C3P0ConnectionProvider.java

@@ -191,6 +191,9 @@ public void configure(Map<String, Object> properties) {
 							DEFAULT_MAX_POOL_SIZE ),
 					fetchSize
 			);
+			if ( !connection.getAutoCommit() ) {
+				connection.rollback();
+			}
 		}
 		catch (SQLException e) {
 			throw new JDBCConnectionException( "Could not create connection", e );

hibernate-core/src/main/java/org/hibernate/engine/jdbc/connections/internal/DriverManagerConnectionProviderImpl.java

@@ -172,6 +172,9 @@ private static ConnectionCreator buildCreator(
 					getInt( POOL_SIZE, configurationValues, 20 ),
 					getFetchSize( connection )
 			);
+			if ( !connection.getAutoCommit() ) {
+				connection.rollback();
+			}
 		}
 		catch (SQLException e) {
 			throw new JDBCConnectionException( "Could not create connection", e );

hibernate-hikaricp/src/main/java/org/hibernate/hikaricp/internal/HikariCPConnectionProvider.java

@@ -101,7 +101,7 @@ public boolean supportsAggressiveRelease() {
 	@Override
 	public DatabaseConnectionInfo getDatabaseConnectionInfo(Dialect dialect) {
 		try ( var connection = hikariDataSource.getConnection() ) {
-			return new DatabaseConnectionInfoImpl(
+			final var info = new DatabaseConnectionInfoImpl(
 					HikariCPConnectionProvider.class,
 					hikariConfig.getJdbcUrl(),
 					// Attempt to resolve the driver name from the dialect,
@@ -124,6 +124,10 @@ public DatabaseConnectionInfo getDatabaseConnectionInfo(Dialect dialect) {
 					hikariConfig.getMaximumPoolSize(),
 					getFetchSize( connection )
 			);
+			if ( !connection.getAutoCommit() ) {
+				connection.rollback();
+			}
+			return info;
 		}
 		catch (SQLException e) {
 			throw new JDBCConnectionException( "Could not create connection", e );