How JDBC thin driver protocol works ???

Hi,
I'm having some problems, I think, with an application that I developed using Java (j2se 1.4.0), the system performance is very good (1500 msec per query) unfortunelly my customer want's more than that.
So I've been working in some optimizations against the code that execute the query, after reading the JDBC Developers guide some modifications were made at the code, altering Statement to PreparedStatement, the time down to 1200 msec, yet too much.
Then I tried another aproach, I've put an Sniffer on the LAN and sniffed the packets that flow to the database from the applet when I executed one single PreparedStatement resulting this table:
--- Time: 2002-10-21 14:16:06
Src IP Dst IP sent recv
TCP 10.0.0.122 1895 10.0.0.119 1525 55 0
TCP 10.0.0.122 1895 10.0.0.119 1525 0 51
TCP 10.0.0.122 1895 10.0.0.119 1525 133 0
TCP 10.0.0.122 1895 10.0.0.119 1525 0 40
TCP 10.0.0.122 1895 10.0.0.119 1525 0 127
TCP 10.0.0.122 1895 10.0.0.119 1525 40 0
The query executed:
select trim(cidade) nome, trim(coduf) uf from cacidade where codcidade = :1
Where codcidade is the Primary Key.
I'm using defineColumnType in the PreparedStatement.
Anyone knows how can I reduce the number os packets that the thin driver put in the network ?
That packets sent and received depents in each other ?
How are implemented the TTC over Java sockets by Oracle?

Anyone knows how can I reduce the number os packets that the thin driver put in the network ?
That packets sent and received depents in each other ?
How are implemented the TTC over Java sockets by Oracle? You should post this question on the JDBC forum here on OTN. Someone there may have more insight into the internals of the jdbc drivers.
Hope this helps,
Rob

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e.g. Consider the below code,
Connection conn = DriverManager.getConnection(...);
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while (rset.next())
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Thanks,
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user565580,
As has been already stated, Oracle does not have data-types INTEGER or SMALLINT, only NUMBER.
So even though Oracle lets you write INTEGER, it really creates a NUMBER.
(As Joe mentioned.)
Other databases don't have a NUMBER data-type, they have INTEGER, SMALLINT, etc.
Originally, Oracle database only had three data-types:
CHAR
DATE
NUMBER
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null

The easiest thing to do is download it as an archive with your applet.
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Hello JDev Team,
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null

Victor,
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Thanks....
null

try this:
conn = DriverManager.getConnection("jdbc:oracle:thin:scott/tiger:@hostname:1521:sid");
or use system/manager as username/passward
null

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BUT:
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1) I would suggest posting this question over in the JDBC forum. The folks over there are far more likely to be able to help you.
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The easiest thing to do is download it as an archive with your applet.
Otherwise, you have to have the files on every client machine.
For netscape, put the classes111.jar in the java classes folder typically:
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Rong Lu (guest) wrote:
: I am using Oracle JDBC thin driver 8.0.5.0.0 to query Oracle
: 8.0.5 via SQL net. The problem I met is every time I try to
: retrieve data for varchar2 (over 2k), it get truncated and
only
: return the first 2k without throwing any warning or exception.
: I tried getString(), getAsciiStream() and getBinaryStream(),
and
: the results are still the same. The SQL Net works fine, since
it
: successfully returns over 2k varchar2 type data when programing
: with PERL.
check the following oracle jdbc faq link :
http://technet.oracle.com/tech/java/sqlj_jdbc/htdocs/jdbc_faq.htm
#_36_
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8.0.5 via SQL net. The problem I met is every time I try to
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return the first 2k without throwing any warning or exception.
I tried getString(), getAsciiStream() and getBinaryStream(), and
the results are still the same. The SQL Net works fine, since it
successfully returns over 2k varchar2 type data when programing
with PERL.
null

Rong Lu (guest) wrote:
: I am using Oracle JDBC thin driver 8.0.5.0.0 to query Oracle
: 8.0.5 via SQL net. The problem I met is every time I try to
: retrieve data for varchar2 (over 2k), it get truncated and
only
: return the first 2k without throwing any warning or exception.
: I tried getString(), getAsciiStream() and getBinaryStream(),
and
: the results are still the same. The SQL Net works fine, since
it
: successfully returns over 2k varchar2 type data when programing
: with PERL.
check the following oracle jdbc faq link :
http://technet.oracle.com/tech/java/sqlj_jdbc/htdocs/jdbc_faq.htm
#_36_
null

How JDBC thin driver protocol works ???

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