[postgis-tickets] [PostGIS] #4300: ST_AsMVTGeom: Uniformize multigeometry return types

[PostGIS]

#4300: ST_AsMVTGeom: Uniformize multigeometry return types
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 Reporter:  Algunenano  |      Owner:  Algunenano
     Type:  defect      |     Status:  assigned
 Priority:  medium      |  Milestone:  PostGIS 2.5.2
Component:  postgis     |    Version:  2.5.x
 Keywords:              |
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 Depending on the result of `lwgeom_make_valid`, ST_AsMVTGeom might return
 a single geometry (polygon or line) or a multigeometry (multipolygon or
 multiline) formed by only 1 geometry.

 I plan to modify this behaviour for the sake of consistency. Since it's
 really hard to determine if the input was a multipolygon / polygon once
 you accept geometry collections, I'm going to choose to return
 POLYGON(geometry) in all cases where the final result is a
 MULTIPOLYGON((single geometry)), and the equivalent for MULTILINE.

 This change only affects 2.5 and trunk as 2.4 had a different behaviour.

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/4300>
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