[postgis] Unable to drop contraint

[John Reid]

  Hi,

Not to be tried on a production database.  Won't be a problem in the 
long term anyway - according to the docs ALTER TABLE can drop check 
constraints in 7.2.

Dave Blasby wrote:

>John Reid wrote:
>
>>Another alternative is to directly manipulate the postgres system
>>catalogues (danger Will Robinson!!!!).  You will need at least usesuper
>>
>
>Pull Up!!  Pull Up!!
>
>Its usually a really bad thing to directly modify the system catalogs.  
>
>You should really just DropGeometryColumn(), then drop the table and
>start from scratch.
>
>Alternatively, here's another method that should work for you:
>
>1. Make a copy of your table (this will have no contraints on it):
>	create table tmp_table as select * from <table>;
>2. DropGeometryColumn() on your old table to de-register the geometry in
>the geometry_columns table
>3. drop the old table
>4. create the table again
>5. AddGeometryColumn() to create & register the geometry column.  Make
>sure you set the parameters correctly.
>6. If you're changing SRIDs you'll have to:
>	update table tmp_table set <geometry column> = setSRID(<geometry
>column>,<srid>)
>7. use "select into..." to put the rows in tmp_table into the new table
>
>dave
>
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-- 
----------------------------------------------------------------------
john reid                                     e-mail jgreid at uow.edu.au
        
uproot your questions from their ground and the dangling roots will be
seen.  more questions!
                                                       -mentat zensufi

apply standard disclaimers as desired...
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