[mapserver-dev] MapScript drawQuery after draw possible?

[Martin Kofahl]

Hello,
I'm going to port an older MapScript 5 application to the current release
and - probably - getting into trouble with the result cache during draw and
drawQuery. Just to make sure calling drawQuery() right after draw() isn't
utterly wrong, please take a look at the following simplified example.

PREAMBLE:
   $map = ms_newMapObj($map_file);
   $point = ms_newpointObj();

   $point->setXY ...
   $layer = $map->getLayerByName ...
   $layer->queryByPoint ...
   $map->querymap->set('style', MS_SELECTED);

WORKING TEST CASE:
   $map->drawQuery();
   $map->draw();

FAILING TEST CASE: msPostGISLayerGetShape: Assertion `layer->layerinfo !=
((void *)0)' failed.
   $map->draw();
   $map->drawQuery();

There are other non-working cases, like processQueryTemplate after draw and
I wonder if draw closes the queried layer somewhat too early.

Thanks for your investigation!
Martin
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