[Mapserver-users] queryByAttributes Mapscript

Armin Burger armin.burger at libero.it
Tue Feb 25 08:40:32 EST 2003


Sven,

the attribute query is done by setting a filter first, e.g.
  $layer->setFilter($queryexpression)
and then performing the query
  $layer->queryByAttributes(...)

where $queryexpression can be any definition described for the filter/class expression of the map file.

Armin

> Hi list,

> I try to find out how to make queries by attributes. The function
> "queryByAttributes(mapObj, integer mode)"
> does this, but how can I specify the attribute?
> Then I got the hint to use the following function
> "yourlayerobj.queryByAttributes(yourmapobj, yourqueryitem,
> yourquerystring, mapscript.MS_SINGLE)",
> but this function is only supported by a not stable version of 3.7*.
> Is there any other possibility to make queries with attributes a user
> may specify?

> Thanks in forward,

> best regards,

> Sven

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