[Fwd: Re: [Pljava-dev] char with trailing space, PreparedStatement.setObject & SetString]
There's an inconsistency between the handling of trailing whitespace in
query parameters in the client jdbc driver compared to the PL/Java SPI
based driver. According to Jean-Pierre, the former apparently trims the
trailing spaces before passing the query (see below). What is the
correct behavior?
Regards,
Thomas Hallgren
-------- Original Message --------
Subject: Re: [Pljava-dev] char with trailing space,
PreparedStatement.setObject & SetString
Date: Tue, 27 Jun 2006 12:07:19 -0400
From: JEAN-PIERRE PELLETIER <pelletier_32@sympatico.ca>
To: thomas@tada.se
CC: pljava-dev@gborg.postgresql.org
Hi Thomas,
There are very few char columns on my system, I can easily live with
explicit trim
in my application code, I only wanted to let you guys know.
I am not sure which of the two JDBC implementations is right.
psql and pgadmin would both handle char as expected.
As for JDBC, you might want to know how other dbms are handling this.
Thanks for your reply.
Jean-Pierre Pelletier
Show quoted text
From: Thomas Hallgren <thomas@tada.se>
To: JEAN-PIERRE PELLETIER <pelletier_32@sympatico.ca>
CC: pljava-dev@gborg.postgresql.org
Subject: Re: [Pljava-dev] char with trailing
space, PreparedStatement.setObject & SetString
Date: Tue, 27 Jun 2006 17:47:24 +0200Hi Jean-Pierre,
I'm not sure this is incorrect behavior. There's nothing in the spec that
indicates that String values should be trimmed by setString and setObject.
On the contrary. Some datatypes (the CHAR in particular) are sensitive to
whitespace according to the SQL standard. Perhaps the client jdbc driver is
doing something wrong here?Regards,
Thomas HallgrenJEAN-PIERRE PELLETIER wrote:
Hi,
Trailing space are not handled properly by setObject & setString.
PreparedStatement pstmt = connection.prepareStatement(
"select * from mytable where mycharcolumn = ?");String myString = "abc ";
pstmt.setObject(1, myString); // or setObject(1, myString, Types.CHAR) or
setString(1, myString)No rows are returned, but using trim works fine as in:
pstmt.setObject(1, myString.trim());My environment is Pl/Java 1.3, Sun JDK 1.5.07, PostgreSQL 8.1.4, Windows
XP SP2With PostgreSQL own (non pl/java) jdbc driver, setObject on char works
fine without the trim.Thanks,
Jean-Pierre Pelletier_______________________________________________
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