Thread: Re: [GENERAL] MS Access to PostgreSQL
--- William Shatner <shatner.william@gmail.com> wrote: > I have recently migrated from MS Access to > PostgreSQL.Previously I had > a SQL command > > ResultSet aGroupResultSet = > aGroupPathStmt.executeQuery( > "SELECT \"groupID\",\"fullpath\" FROM > \"groups\" WHERE > \"fullpath\" Like '" + > aPath + "'"); > > > > where aPath was equal to 'folder\another folder\%'. > > The field to be edited stores the full path in the > format > 'folder\folder1\folder2' and so on... > The purpose being to change all groups at this level > of the > hieracarchy and below, this was achieved using the > '%' in Access, this > however doesn't seem to work in PostgreSQL, it > doesn't error out but > it just seems to see the '%' as a normal character. > > How can this be done in PostgreSQL? > I suspect that, unlike Access, PostgreSQL will intrepret C-style escape sequences (ie: \r, \n, \t) so you'll need to properly escape the backslash in aPath like so: folder1\\folder2\\folder3 Regards, Shelby Cain __________________________________ Do you Yahoo!? Yahoo! Small Business - Try our new resources site! http://smallbusiness.yahoo.com/resources/
Hi Shelby,
I don't think the problem isn't with the backslashes. They are escaped and
seem to be working fine e.g. to insert a backslash in Access I had to use
one escape character ('\\') whereas in PostgreSQL four backslashes ('\\\\')
are required. The line that inserts the % is as follows...
String aPath = group.getPath() + aOldGroupName + "\\%";
It just doesn't seem to be having the same effect in PostgreSQL as in
Access.
B
-----Original Message-----
From: pgsql-jdbc-owner@postgresql.org
[mailto:pgsql-jdbc-owner@postgresql.org] On Behalf Of Shelby Cain
Sent: 11 March 2005 17:32
To: William Shatner; pgsql-novice@postgresql.org;
pgsql-general@postgresql.org; pgsql-jdbc@postgresql.org
Subject: Re: [JDBC] [GENERAL] MS Access to PostgreSQL
--- William Shatner <shatner.william@gmail.com> wrote:
> I have recently migrated from MS Access to
> PostgreSQL.Previously I had
> a SQL command
>
> ResultSet aGroupResultSet =
> aGroupPathStmt.executeQuery(
> "SELECT \"groupID\",\"fullpath\" FROM
> \"groups\" WHERE
> \"fullpath\" Like '" +
> aPath + "'");
>
>
>
> where aPath was equal to 'folder\another folder\%'.
>
> The field to be edited stores the full path in the
> format
> 'folder\folder1\folder2' and so on...
> The purpose being to change all groups at this level
> of the
> hieracarchy and below, this was achieved using the
> '%' in Access, this
> however doesn't seem to work in PostgreSQL, it
> doesn't error out but
> it just seems to see the '%' as a normal character.
>
> How can this be done in PostgreSQL?
>
I suspect that, unlike Access, PostgreSQL will
intrepret C-style escape sequences (ie: \r, \n, \t) so
you'll need to properly escape the backslash in aPath
like so:
folder1\\folder2\\folder3
Regards,
Shelby Cain
__________________________________
Do you Yahoo!?
Yahoo! Small Business - Try our new resources site!
http://smallbusiness.yahoo.com/resources/
---------------------------(end of broadcast)---------------------------
TIP 8: explain analyze is your friend
On Fri, 2005-03-11 at 17:52 +0000, Brian Gunning wrote:
[rearranged quoting]
> From: pgsql-jdbc-owner@postgresql.org
> --- William Shatner <shatner.william@gmail.com> wrote:
> > I have recently migrated from MS Access to
> > PostgreSQL.Previously I had
> > a SQL command
> >
> > ResultSet aGroupResultSet =
> > aGroupPathStmt.executeQuery(
> > "SELECT \"groupID\",\"fullpath\" FROM
> > \"groups\" WHERE
> > \"fullpath\" Like '" +
> > aPath + "'");
> >
> >
> > where aPath was equal to 'folder\another folder\%'.
> >
> I don't think the problem isn't with the backslashes. They are escaped and
> seem to be working fine e.g. to insert a backslash in Access I had to use
> one escape character ('\\') whereas in PostgreSQL four backslashes ('\\\\')
> are required. The line that inserts the % is as follows...
>
> String aPath = group.getPath() + aOldGroupName + "\\%";
are the backslashes in group.getPath() + aOldGroupName escaped ?
does aGroupPathStmt.executeQuery() escape backslashes ?
did you print the SQL statement to screen or logfile to make sure
what is actually sent to executeQuery() ?
does your language support placeholders ? this kind of problems are
usually easier to deal with with them.
gnari