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From "Lynh Nguyen (JIRA)" <derby-...@db.apache.org>
Subject [jira] Created: (DERBY-121) Network Server reading blob/clob data size
Date Sat, 15 Jan 2005 02:20:17 GMT
Network Server reading blob/clob data size
------------------------------------------

         Key: DERBY-121
         URL: http://issues.apache.org/jira/browse/DERBY-121
     Project: Derby
        Type: Bug
  Components: Network Server  
    Versions: 10.1.0.0    
 Environment: The is a bit shift typo in Network Server reading clob/blob data size
    Reporter: Lynh Nguyen
    Priority: Minor


in DDMReader.java 
...
... readLengthAndCodePoint() ... { 
...

switch (numberOfExtendedLenBytes) {
			case 8:
				 ddmScalarLen =
					((buffer[pos++] & 0xff) << 64) +
					((buffer[pos++] & 0xff) << 56) +
					((buffer[pos++] & 0xff) << 48) +
					((buffer[pos++] & 0xff) << 40) +
					((buffer[pos++] & 0xff) << 32) +
					((buffer[pos++] & 0xff) << 16) +
					((buffer[pos++] & 0xff) << 8) +
					((buffer[pos++] & 0xff) << 0);
				adjustSize = 12;
				break;
			case 6:
				ddmScalarLen =
					((buffer[pos++] & 0xff) << 48) +
					((buffer[pos++] & 0xff) << 40) +
					((buffer[pos++] & 0xff) << 32) +
					((buffer[pos++] & 0xff) << 16) +
					((buffer[pos++] & 0xff) << 8) +
					((buffer[pos++] & 0xff) << 0);
				adjustSize = 10;
				break;
			case 4:
				ddmScalarLen =
					((buffer[pos++] & 0xff) << 32) +
					((buffer[pos++] & 0xff) << 16) +
					((buffer[pos++] & 0xff) << 8) +
					((buffer[pos++] & 0xff) << 0);
				adjustSize = 8;
				break;
...
The shift bits should be in order:
0,8,16,24 
0,8,16,24,32,40
0,8,16,24,32,40,48,56

This will only affect the larger clob/blob (over 64K ...)


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