[Mapserver-users] msyyparse() - parse error
Möri Cédric
Cedric.Moeri at bd.so.ch
Wed Mar 24 07:38:19 PST 2004
Hi list!
i'm still stuck on this problem. So my question for the moment is the
following:
Is it possible to have an error message with a little more information?
For the moment it only tells me "msyyparse(): Expression parser error. parse
error".
It would be great to have a filename and a line/record number or at least a
some twenty characters of the ofending data or expression. It would be much
more easier to investigate the error.
Is this already possible (through some debug-level or other switches I don't
know about) or would it be a big challenge to add such a feature?
best regards
Cédric
> -----Original Message-----
> From: Steve Lime [mailto:steve.lime at dnr.state.mn.us]
> Sent: Monday, March 22, 2004 5:38 PM
> To: Cedric.Moeri at bd.so.ch; mapserver-users at lists.gis.umn.edu
> Subject: Re: [Mapserver-users] msyyparse() - parse error
>
>
> Hi there: Msyyparse() is the function that evaluates
> MapServer expressions. There
> are 3 possibilities:
>
> 1) There is an error in the expression you're using.
> 2) There is something funky in your data, that breaks an expression.
> 3) There is an error in the code itself.
>
> Although 1) and 3) are possible they seem unlikely. My guess
> is that there is an
> issue with certain data values and the expressions. One
> example would be
> data values containing embeded quotes. Let's say you had a place name
> called O'Reilly and where using an expression like:
>
> ('[placename]' = 'foo') which would become in the case of O'Reilly,
>
> ('O'Reilly' = 'foo') and this would cause a parse error.
>
> Could also happen with numeric fields that didn't contain
> numbers or are empty.
> We'd really need to see your mapfile to make the call.
>
> Steve
>
> >>> Möri Cédric <Cedric.Moeri at bd.so.ch> 3/22/2004 4:27:42 AM >>>
> Hello list!
>
> we recently upgraded our systems from
> MapServer3.6.6/postgreSQL7.2.4/postgis0.8.0 to
> MapServer4.0.1/postgreSQL7.4.2/postgis0.8.1. The system is
> running under
> Linux RH7.2.
>
> Now i'm reciving sometimes this strange error "msyyparse(): Expression
> parser error. parse error".
> (In the old version, everyting worked perfect!)
>
> I'm not able to reproduce this error regularly. Sometimes it
> triggers when
> i'm switching some layers on/off, sometimes it triggers when
> i'm just paning
> (same layer-set/same scale). Sometimes it triggers only one
> time, othertimes
> up to 60 times with still the same mapfile.
>
> I read from the archives that there might be some issue about
> the querrying
> in postgis but there is not much more.
>
> So I guess I'm stuck. Has anybody a hint for me in which
> direction to go on
> with my quest? May anybody explain what the msyyparse does,
> and when it is
> called?
>
> Any hint would be appreciated!
> If needed I would be glad to provide further information.
>
> best regards
> mit freundlichen Grüssen
>
> Cédric Möri
>
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