Strip particular types out of a GeometryCollection

[pramsey]

The constructive function (union / difference) often create GeometryCollections, while people usually want a homogeneous result back (polygon, multilinestring, etc). A helper function that takes in collection and outputs only the desired type would make it easier for people to do these operations entirely in the database.

[pramsey]

Main commit at r4847. Implementation, documentation, regressions.

[robe]

Paul -- okay -- this is the second time you have done this, so I guess its faster to just point this out rather than clean up after you.

Can you please put in a

Availability: 1.5

that's how it gets flagged to go in the New in 1.5 section.

[pramsey]

Thanks, availability at r4849

[pramsey]

No comments on the function name, API?

[robe]

No -- but would help if you defined in your documentation what the constants are. I as an end user would just be guessing at the wind to know what "1" means? More examples would help too :)

[pramsey]

Ok, more references to constants and another example added at r4855