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Accept multi-line SQL queries in table parameter #173

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artemp opened this Issue · 4 comments

1 participant

@artemp
Mapnik member

Currently, it seems necessary to pre-process SQL by removing line breaks.

@artemp
Mapnik member

[springmeyer] Migurski, I'm interested in looking into this.

What error's do you get currently, or does mapnik fail silently to render when postgres queries fail?

@artemp
Mapnik member

[migurski] I don't see an error, but I see behavior consistent with mapnik ignoring any parts of the query after the first line break.

@artemp
Mapnik member

[springmeyer] Hmm, mike even with crazy multiline queries like in this test mapfile: http://mapnik-utils.googlecode.com/svn/sandbox/multiline_tests/ the mapnik postgis plugin seems to render fine.

Any chance you could post a query gone wrong?

Also, would be great if you could rebuild mapnik with DEBUG=True and then check out the query that mapnik outputs...

ie, based on that example above this is one query that mapnik prints in debug output and it works for me:
{{{
select asbinary(the_geom) as geom from (select * from world where
cntry_name
= 'Germany') as

  world

where the_geom && setSRID('BOX3D(-180 -90,180 83.62359619140619)'::box3d,4326)
}}

@artemp
Mapnik member

[artem] fixed in r862

@artemp artemp closed this
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