[mapserver-users] Postgis data source: quoting table name problem

[Milo van der Linden]

Hello Marco,


If you do not specify ...using unique geoidnd using SRID=28992'
mapserver will search the table for srid information, again sending the
table name in a query to the database as seen in the error message.

I agree that this might be a tiny bug, but it might be a workaround to
define the srid in the DATA clause.

Kind regards,

Milo van der Linden



On Mon, 2009-06-22 at 15:02 +0200, DeDuikertjes wrote:
> Dear List,
> 
> I've extensively searched the archives, saw a couple of more or less
> related posts, but couldn't find any solutions for my problem.
> 
> In my mapserver application I use postgis as a data source.
> In my application the tables containing geometry columns do need to have
> odd characters like . and - in their names (for clarity: the table names
> that is, not the column names).
> Postgis allows this by double qouting the table name in functions,
> queries and sql statements.
> 
> So in mapserver I like to do that as well as in the following example:
> 
> DATA 'tc_vlak_geometry from "nl_imro_0026_svbbu_0001" using unique geoidn'
> 
> Unfortunately that fails with a message from the WMS:
> 
> msDrawMap(): Image handling error. Failed to draw layer named
> 'geoidNL.IMRO.SVBBU-102-_vlak'. prepare_database(): Query error. Error
> executing POSTGIS DECLARE (the actual query) statement: 'DECLARE
> mycursor BINARY CURSOR FOR SELECT
> asbinary(force_collection(force_2d(tc_vlak_geometry)),'NDR'),geoidn::text
> from "nl_imro_0026_svbbu_0001" WHERE tc_vlak_geometry &&
> setSRID('BOX3D(155016 467631,156758 470080)'::BOX3D,
> find_srid('','"nl_imro_0026_svbbu_0001"','tc_vlak_geometry') )'
> Postgresql reports the error as 'ERROR: find_srid() - couldnt find the
> corresponding SRID - is the geometry registered in the GEOMETRY_COLUMNS
> table? Is there an uppercase/lowercase missmatch? ' More Help: Error
> with POSTGIS data variable. You specified 'check your .map file'.
> Standard ways of specifiying are : (1) 'geometry_column from
> geometry_table' (2) 'geometry_column from (sub query) as foo using
> unique column name using SRID=srid#' Make sure you put in the 'using
> unique column name' and 'using SRID=#' clauses in. For more help, please
> see http://postgis.refractions.net/documentation/ Mappostgis.c - version
> of Jan 23/2004
> 
> Removing the quotes works fine and gives a map from the WMS.
> Of course removing the quotes in this example is no problem because
> there are no odd characters like . and -.
> When tablenames do have these characters, the query of course fails.
> 
> Are there any workarounds for this problem other than renaming tables to
> names without odd characters?
> (and yes, I've tried to add using srid = 28992 to the DATA string, but
> that doesn't help).
> (and yes, I've tried escaping double quotes like DATA "'tc_vlak_geometry
> from \"nl_imro_0026_svbbu_0001\" using unique geoidn"')
> 
> Any help greatly appreciated.
> 
> MArco
> 
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> mapserver-users at lists.osgeo.org
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