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Re: InstantDB: longvarbinary column in where clause


Vidur

With InstantDB you can't compare a double value against a binary value.
InstantDB knows very little about the structure of binary data. It
essentially classifies it as a string, a Java object, or as anything else.
In the case of "anything else" it doesn't know whether its a number, an
image or whatever, so it doesn't know how to perform the compare.

I couldn't reproduce exactly the same exception though. Maybe you could
alter the attached script to bring it closer to what you're trying to do?

Regards

Peter Hearty
Lutris Technologies UK Ltd.
-----Original Message-----
From: Vidur Dhanda <vdhanda@active-solutions-inc.com>
To: instantDB <instantDB@enhydra.org>
Date: 04 July 2000 21:09
Subject: InstantDB: longvarbinary column in where clause


>Hello,
>
>Is it possible to test for equality on a longvarbinary column.  When I
>use a prepared statement -- select * from A where longvarbinarycolumnB =
>an instance of a Double,  I get an exception:
>java.sql.SQLException: java.lang.Double
> at org.enhydra.instantdb.db.SQLProg.execute(SQLProg.java:276)
> at
>org.enhydra.instantdb.jdbc.idbPreparedStatement.execute(idbPreparedStatemen
t.java:92)
>
> at
>org.enhydra.instantdb.jdbc.idbPreparedStatement.executeQuery(idbPreparedSta
tement.java:59)
>
>Thanks,
>Vidur
>
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>
d org.enhydra.instantdb.jdbc.idbDriver;
o jdbc:idb:e:/instantdb/bugs/sample.prp;

c set timeout 10000;
e SET EXPORT "trace.log" TRACE 6 CONSOLE;

e drop table Test;
e CREATE TABLE Test (long1 longvarbinary);
e insert into test values (10);
e select * from test where long1=10.0;

c close;
c exit;