Patches submitted by Kris Jurka (jurka@ejurka.com) for the following bugs:

- Properly drop tables in jdbc regression tests with cascade for 7.3
  - problem with Statement.execute() and executeUpdate() not clearing binds
  - problem with ResultSet not correctly handling default encoding
  - changes to correctly support show transaction isolation level in 7.3
  - changed DatabaseMetaDataTest to handle differences in FK names in 7.3
  - better fix for dynamically checking server NAME data length
  (With the fixes above the jdbc regression tests pass on jdbc2 and jdbc3
   against both a 7.2 and 7.3 server)
Patchs submitted by David Wall (d.wall@computer.org):
  - problem with getBlob when largeobject oid is null
  - improvements to BlobOutputStream
Patch submitted by Haris Peco (snpe@snpe.co.yu):
  - problem with callable statement not supporting prepared statement methods

 Modified Files:
 	jdbc/org/postgresql/Driver.java.in
 	jdbc/org/postgresql/jdbc1/AbstractJdbc1Connection.java
 	jdbc/org/postgresql/jdbc1/AbstractJdbc1DatabaseMetaData.java
 	jdbc/org/postgresql/jdbc1/AbstractJdbc1Statement.java
 	jdbc/org/postgresql/jdbc2/AbstractJdbc2ResultSet.java
 	jdbc/org/postgresql/jdbc2/AbstractJdbc2Statement.java
 	jdbc/org/postgresql/jdbc2/Jdbc2ResultSet.java
 	jdbc/org/postgresql/jdbc3/Jdbc3ResultSet.java
 	jdbc/org/postgresql/largeobject/BlobOutputStream.java
 	jdbc/org/postgresql/largeobject/LargeObject.java
 	jdbc/org/postgresql/test/TestUtil.java
 	jdbc/org/postgresql/test/jdbc2/DatabaseMetaDataTest.java
 	jdbc/org/postgresql/test/jdbc2/UpdateableResultTest.java
 	jdbc/org/postgresql/test/jdbc2/optional/BaseDataSourceTest.java
 	jdbc/org/postgresql/test/jdbc2/optional/ConnectionPoolTest.java
 	jdbc/org/postgresql/test/jdbc2/optional/SimpleDataSourceTest.java

src/interfaces/jdbc/org/postgresql/jdbc2/AbstractJdbc2ResultSet.java

@@ -15,7 +15,7 @@ import org.postgresql.util.PGbytea;
 import org.postgresql.util.PSQLException;
 
 
-/* $Header: /cvsroot/pgsql/src/interfaces/jdbc/org/postgresql/jdbc2/Attic/AbstractJdbc2ResultSet.java,v 1.7 2002/09/06 21:23:06 momjian Exp $
+/* $Header: /cvsroot/pgsql/src/interfaces/jdbc/org/postgresql/jdbc2/Attic/AbstractJdbc2ResultSet.java,v 1.8 2002/09/11 05:38:45 barry Exp $
  * This class defines methods of the jdbc2 specification.  This class extends
  * org.postgresql.jdbc1.AbstractJdbc1ResultSet which provides the jdbc1
  * methods.  The real Statement class (for jdbc2) is org.postgresql.jdbc2.Jdbc2ResultSet
@@ -1546,14 +1546,7 @@ public abstract class AbstractJdbc2ResultSet extends org.postgresql.jdbc1.Abstra
 				case Types.REAL:
 				case Types.TINYINT:
 
-					try
-					{
-						rowBuffer[columnIndex] = String.valueOf( updateValues.get( columnName ) ).getBytes(connection.getEncoding().name() );
-					}
-					catch ( UnsupportedEncodingException ex)
-					{
-						throw new SQLException("Unsupported Encoding " + connection.getEncoding().name());
-					}
+					rowBuffer[columnIndex] = connection.getEncoding().encode(String.valueOf( updateValues.get( columnName ) ));
 
 				case Types.NULL:
 					continue;

src/interfaces/jdbc/org/postgresql/jdbc2/AbstractJdbc2Statement.java

@@ -8,7 +8,7 @@ import java.util.Vector;
 import org.postgresql.largeobject.*;
 import org.postgresql.util.PSQLException;
 
-/* $Header: /cvsroot/pgsql/src/interfaces/jdbc/org/postgresql/jdbc2/Attic/AbstractJdbc2Statement.java,v 1.6 2002/09/06 21:23:06 momjian Exp $
+/* $Header: /cvsroot/pgsql/src/interfaces/jdbc/org/postgresql/jdbc2/Attic/AbstractJdbc2Statement.java,v 1.7 2002/09/11 05:38:45 barry Exp $
  * This class defines methods of the jdbc2 specification.  This class extends
  * org.postgresql.jdbc1.AbstractJdbc1Statement which provides the jdbc1
  * methods.  The real Statement class (for jdbc2) is org.postgresql.jdbc2.Jdbc2Statement
@@ -187,16 +187,26 @@ public abstract class AbstractJdbc2Statement extends org.postgresql.jdbc1.Abstra
 			while (numRead != -1 && bytesRemaining > 0)
 			{
 				bytesRemaining -= numRead;
-				los.write(buf, 0, numRead);
+				if ( numRead == buf.length )
+					los.write(buf); // saves a buffer creation and copy in LargeObject since it's full
+				else
+					los.write(buf,0,numRead);
 				numRead = l_inStream.read(buf, 0, Math.min(buf.length, bytesRemaining));
 			}
-			los.close();
 		}
 		catch (IOException se)
 		{
 			throw new PSQLException("postgresql.unusual", se);
 		}
-		// lob is closed by the stream so don't call lob.close()
+		finally
+		{
+			try
+			{
+				los.close();
+                l_inStream.close();
+            }
+            catch( Exception e ) {}
+		}
 		setInt(i, oid);
 	}
 

src/interfaces/jdbc/org/postgresql/jdbc2/Jdbc2ResultSet.java

@@ -5,7 +5,7 @@ import java.sql.*;
 import java.util.Vector;
 import org.postgresql.Field;
 
-/* $Header: /cvsroot/pgsql/src/interfaces/jdbc/org/postgresql/jdbc2/Attic/Jdbc2ResultSet.java,v 1.5 2002/09/06 21:23:06 momjian Exp $
+/* $Header: /cvsroot/pgsql/src/interfaces/jdbc/org/postgresql/jdbc2/Attic/Jdbc2ResultSet.java,v 1.6 2002/09/11 05:38:45 barry Exp $
  * This class implements the java.sql.ResultSet interface for JDBC2.
  * However most of the implementation is really done in
  * org.postgresql.jdbc2.AbstractJdbc2ResultSet or one of it's parents
@@ -25,11 +25,19 @@ public class Jdbc2ResultSet extends org.postgresql.jdbc2.AbstractJdbc2ResultSet
 
 	public java.sql.Clob getClob(int i) throws SQLException
 	{
+		wasNullFlag = (this_row[i - 1] == null);
+		if (wasNullFlag)
+			return null;
+
 		return new org.postgresql.jdbc2.Jdbc2Clob(connection, getInt(i));
 	}
 
 	public java.sql.Blob getBlob(int i) throws SQLException
 	{
+		wasNullFlag = (this_row[i - 1] == null);
+		if (wasNullFlag)
+			return null;
+
 		return new org.postgresql.jdbc2.Jdbc2Blob(connection, getInt(i));
 	}