SQL to read with the DISABLE STORAGE IN ROW set

Question

I am having problems inserting a clob > 4k. I have changed my default setting to DISABLE STORAGE IN ROW. The problem is, when my clob
4k, I get a null pointer exception on my read. THE INSERT:
insert into XML_W_BOOKING (WORKCONVERSATIONID, FREQUENTFLYERNUMBER, XMLSTRING)values(WORKCONVERSATIONID_SEQ.NEXTVAL, pCntr.frequentFlyerNumber, EMPTY_CLOB());
THE UPDATE:
PreparedStatement pstmt = this.connection.prepareStatement("update XML_W_BOOKING set XMLSTRING = ? where WORKCONVERSATIONID = ?");
pstmt.setAsciiStream(1, new StringBufferInputStream(pCntr.xmlString), pCntr.xmlString.length());
pstmt.setLong(2, pCntr.workConversationId);
pstmt.executeQuery();
pstmt.close();
THE READ:
myContainer.workConversationId= pRset.getLong(1);
myContainer.frequentFlyerNumber=pRset.getLong(2);
java.sql.Clob clob = pRset.getClob(3);
int c;
int length = new Long(clob.length()).intValue();
StringBuffer strBuf = new StringBuffer(length);
BufferedInputStream bin = new BufferedInputStream(pRset.getAsciiStream(3));
while((c = bin.read()) != -1){
strBuf.append((char)c);
String str = strBuf.toString();
System.out.println("str: " + str);
myContainer.xmlString = str;
Any suggestions? Is there a special sql statement I should be using to read when the "DISABLE STORAGE IN ROW" setting? I am using Oracle 8i and wls 5.1.
IP: Logged
null

Answer 1

Enable/Disable storage in row is used for LOB columns. If enable storage in row is specified and the length of the LOB field is less than 4K then the LOB is stored along with other table data, else it is stored in a seperate segment. If disable storage in row is specified then LOB data is stored always in a seperate segment. When the LOB is stored in a seperate segment the storage parameters are determined by the values specified for CHUNKS and PCTVERSION. One chunk stores only one LOB data even if enough space is aavailable in the chunk. If the size of LOB data is small then enable storage.
To calculate the space used by the tables use the query below
For Table Data
select segment_name, sum(bytes) from user_segments where segment_name in ('TABLE', 'TABLE1', 'TABLE2') group by segment_name;
For LOB's
select segment_name, sum(bytes) from user_segments where segment_name in (select segment_name from user_lobs where table_name in('TABLE', 'TABLE1', 'TABLE2'))
group by segment_name;
Jayant