From: nvadekar@netscape.net
To: pgsql-interfaces@postgresql.org
Subject: Can't get JDBC BLOB online manual example working
Date: Sat, 06 Jan 2001 17:49:49 -0500
Message-ID: <3DDC51B2.518A91EB.00A515D0@netscape.net> (raw)
In the online manual is gives the following eg. on how to access a blob uisng
jdbc:
PreparedStatement ps = con.prepareStatement("select oid from images where
name=keyfield");
ps.setString(1,"myimage.gif");
ResultSet rs = ps.executeQuery();
if(rs!=null) {
while(rs.next()) {
InputStream is = rs.getBinaryInputStream(1);
// use the stream in some way here
is.close();
}
rs.close();
}
ps.close();
I have tried this to no avail. The getBinaryInputStream method is not
available in the packages that are included in the JSP page. I don't know
why, I know the select statement is working, but it only works when I have
the line with getBinaryInputStream commented out. How do I get access to
that method? I am using jdbc7.0.1-2.jar. I thought that by using the jdbc
driver, that method would be available to me???
I tried getBinaryStream, instead of getBinaryInputStream, but then I get the
following error:
javax.servlet.ServletException: FastPath call returned ERROR: Relation 0
does not exist
I then changed everthing to a BLOB object instead of InputStream as follows:
byte[] blob1 = rs1.getBytes("photoblob"); \\photoblob is the name of the field
but I still keep getting the:
javax.servlet.ServletException: FastPath call returned ERROR: Relation 0
does not exist
error. How do I get past this error, it is killing me! What does Relation 0
does not exist mean? What is the FastPath error. Every object and method I
try to use to access the BLOB results in that same error. I am using RedHat
7.0, Postgresql 7.02 and Tomcat 3.2.1.
HELP, and Thanks in advance.
Neal Vadekar
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To: pgsql-interfaces@postgresql.org
Cc: nvadekar@netscape.net
Subject: Re: Can't get JDBC BLOB online manual example working
In-Reply-To: <3DDC51B2.518A91EB.00A515D0@netscape.net>
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