EXPERIMENT: Use the JDBC metadata to display more info about the datasource

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

@@ -112,17 +112,27 @@ public Integer getPoolMaxSize() {
 
 	@Override
 	public String toInfoString() {
-		return "\tDatabase JDBC URL [" + handleEmpty( jdbcUrl ) + ']' +
-				"\n\tDatabase driver: " + handleEmpty( jdbcDriver ) +
-				"\n\tDatabase version: " + handleEmpty( dialectVersion ) +
-				"\n\tAutocommit mode: " + handleEmpty( autoCommitMode ) +
-				"\n\tIsolation level: " + handleEmpty( isolationLevel ) +
-				"\n\tPool: " + handleEmpty( connectionProviderClass ) +
-				"\n\tMinimum pool size: " + handleEmpty( poolMinSize ) +
-				"\n\tMaximum pool size: " + handleEmpty( poolMaxSize );
-	}
-
-	private static String handleEmpty(String value) {
+		return """
+				\tDatabase JDBC URL [%s]
+				\tDatabase driver: %s
+				\tDialect version: %s
+				\tAutocommit mode: %s
+				\tIsolation level: %s
+				\tPool: %s
+				\t\tMinimum size: %s
+				\t\tMaximum size: %s"""
+				.formatted(
+						handleEmpty( jdbcUrl ),
+						handleEmpty( jdbcDriver ),
+						handleEmpty( dialectVersion ),
+						handleEmpty( autoCommitMode ),
+						handleEmpty( isolationLevel ),
+						handleEmpty( connectionProviderClass ),
+						handleEmpty( poolMinSize ),
+						handleEmpty( poolMaxSize ) );
+	}
+
+	static String handleEmpty(String value) {
 		return isNotEmpty( value ) ? value : DEFAULT;
 	}
 

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

@@ -157,36 +157,42 @@ public DatabaseConnectionInfo getDatabaseConnectionInfo(Dialect dialect) {
 
 	@Override
 	public DatabaseConnectionInfo getDatabaseConnectionInfo(Dialect dialect, ExtractedDatabaseMetaData metaData) {
-		final String url;
-		final String driver;
-		final String isolationLevel;
-		if ( metaData != null ) {
-			url = metaData.getUrl();
-			driver = metaData.getDriver();
-			isolationLevel = toIsolationNiceName( metaData.getTransactionIsolation() )
-							+ " [default " + toIsolationNiceName( metaData.getDefaultTransactionIsolation() ) + "]";
-		}
-		else {
-			url = null;
-			driver = null;
-			isolationLevel = null;
-		}
-
 		return new DatabaseConnectionInfoImpl(
 				DatasourceConnectionProviderImpl.class,
-				url,
-				driver,
+				metaData == null ? null : metaData.getUrl(),
+				metaData == null ? null : metaData.getDriver(),
 				dialect.getVersion(),
 				null,
-				isolationLevel,
+				metaData == null
+						? null
+						: toIsolationNiceName( metaData.getTransactionIsolation() )
+								+ " [default " + toIsolationNiceName( metaData.getDefaultTransactionIsolation() ) + "]",
 				null,
 				null
 		) {
 			@Override
 			public String toInfoString() {
-				return dataSourceJndiName != null
-						? "\tDataSource JNDI name [" + dataSourceJndiName + "]\n" + super.toInfoString()
-						: super.toInfoString();
+				var infoString = new StringBuilder();
+				if ( dataSourceJndiName != null ) {
+					infoString
+							.append( "\tDataSource JNDI name [" )
+							.append( dataSourceJndiName )
+							.append( "]\n" );
+				}
+				if ( metaData != null ) {
+					infoString
+							.append( "\tDatabase: ")
+							.append( handleEmpty( metaData.getDatabaseProductName() ) )
+							.append( " " )
+							.append( handleEmpty( metaData.getDatabaseProductVersion() ) )
+							.append( "\n\t\tCatalog: ")
+							.append( handleEmpty( metaData.getConnectionCatalogName() ) )
+							.append( "\n\t\tSchema: ")
+							.append( handleEmpty( metaData.getConnectionSchemaName() ) )
+							.append( "\n" );
+				}
+				infoString.append( super.toInfoString() );
+				return infoString.toString();
 			}
 		};
 	}

hibernate-core/src/main/java/org/hibernate/engine/jdbc/env/internal/ExtractedDatabaseMetaDataImpl.java

@@ -33,6 +33,9 @@ public class ExtractedDatabaseMetaDataImpl implements ExtractedDatabaseMetaData
 	private final JdbcEnvironment jdbcEnvironment;
 	private final JdbcConnectionAccess connectionAccess;
 
+	private final String databaseProductName;
+	private final String databaseProductVersion;
+
 	private final String connectionCatalogName;
 	private final String connectionSchemaName;
 
@@ -61,6 +64,8 @@ private ExtractedDatabaseMetaDataImpl(
 			JdbcConnectionAccess connectionAccess,
 			String connectionCatalogName,
 			String connectionSchemaName,
+			String databaseProductName,
+			String databaseProductVersion,
 			boolean supportsRefCursors,
 			boolean supportsNamedParameters,
 			boolean supportsScrollableResults,
@@ -78,6 +83,8 @@ private ExtractedDatabaseMetaDataImpl(
 		this.connectionAccess = connectionAccess;
 		this.connectionCatalogName = connectionCatalogName;
 		this.connectionSchemaName = connectionSchemaName;
+		this.databaseProductName = databaseProductName;
+		this.databaseProductVersion = databaseProductVersion;
 		this.supportsRefCursors = supportsRefCursors;
 		this.supportsNamedParameters = supportsNamedParameters;
 		this.supportsScrollableResults = supportsScrollableResults;
@@ -138,6 +145,16 @@ public SQLStateType getSqlStateType() {
 		return sqlStateType;
 	}
 
+	@Override
+	public String getDatabaseProductName() {
+		return databaseProductName;
+	}
+
+	@Override
+	public String getDatabaseProductVersion() {
+		return databaseProductVersion;
+	}
+
 	@Override
 	public String getConnectionCatalogName() {
 		return connectionCatalogName;
@@ -195,22 +212,24 @@ public static class Builder {
 		private final boolean jdbcMetadataIsAccessible;
 		private final JdbcConnectionAccess connectionAccess;
 
-		private String connectionSchemaName;
-		private String connectionCatalogName;
-
-		private boolean supportsRefCursors;
-		private boolean supportsNamedParameters;
-		private boolean supportsScrollableResults;
-		private boolean supportsGetGeneratedKeys;
-		// In absence of DatabaseMetaData batching updates is assumed to be supported
-		private boolean supportsBatchUpdates = true;
-		private boolean supportsDataDefinitionInTransaction;
-		private boolean doesDataDefinitionCauseTransactionCommit;
-		private SQLStateType sqlStateType;
-		private String url;
-		private String driver;
-		private int defaultTransactionIsolation;
-		private int transactionIsolation;
+	private String connectionSchemaName;
+	private String connectionCatalogName;
+	private String databaseProductName;
+	private String databaseProductVersion;
+
+	private boolean supportsRefCursors;
+	private boolean supportsNamedParameters;
+	private boolean supportsScrollableResults;
+	private boolean supportsGetGeneratedKeys;
+	// In absence of DatabaseMetaData batching updates is assumed to be supported
+	private boolean supportsBatchUpdates = true;
+	private boolean supportsDataDefinitionInTransaction;
+	private boolean doesDataDefinitionCauseTransactionCommit;
+	private SQLStateType sqlStateType;
+	private String url;
+	private String driver;
+	private int defaultTransactionIsolation;
+	private int transactionIsolation;
 
 		public Builder(JdbcEnvironment jdbcEnvironment, boolean jdbcMetadataIsAccessible, JdbcConnectionAccess connectionAccess) {
 			this.jdbcEnvironment = jdbcEnvironment;
@@ -221,6 +240,8 @@ public Builder(JdbcEnvironment jdbcEnvironment, boolean jdbcMetadataIsAccessible
 		public Builder apply(DatabaseMetaData databaseMetaData) throws SQLException {
 			connectionCatalogName = databaseMetaData.getConnection().getCatalog();
 			// NOTE : databaseMetaData.getConnection().getSchema() would require java 1.7 as baseline
+			databaseProductName = databaseMetaData.getDatabaseProductName();
+			databaseProductVersion = databaseMetaData.getDatabaseProductVersion();
 			supportsRefCursors = StandardRefCursorSupport.supportsRefCursors( databaseMetaData );
 			supportsNamedParameters = databaseMetaData.supportsNamedParameters();
 			supportsScrollableResults = databaseMetaData.supportsResultSetType( ResultSet.TYPE_SCROLL_INSENSITIVE );
@@ -292,6 +313,8 @@ public ExtractedDatabaseMetaDataImpl build() {
 					connectionAccess,
 					connectionCatalogName,
 					connectionSchemaName,
+					databaseProductName,
+					databaseProductVersion,
 					supportsRefCursors,
 					supportsNamedParameters,
 					supportsScrollableResults,

hibernate-core/src/main/java/org/hibernate/engine/jdbc/env/spi/ExtractedDatabaseMetaData.java

@@ -25,6 +25,10 @@ public interface ExtractedDatabaseMetaData {
 	 */
 	JdbcEnvironment getJdbcEnvironment();
 
+	String getDatabaseProductName();
+
+	String getDatabaseProductVersion();
+
 	/**
 	 * Retrieve the name of the catalog in effect when we connected to the database.
 	 *

hibernate-core/src/test/java/org/hibernate/orm/test/datasource/TestDataSourceConnectionProvider.java

@@ -17,6 +17,7 @@
 import java.util.Map;
 import java.util.logging.Logger;
 
+@SuppressWarnings( "unused" ) // used by DatasourceTest in this package
 public class TestDataSourceConnectionProvider
 		extends DatasourceConnectionProviderImpl
 		implements ServiceRegistryAwareService {