Nyall Dawson 5e1a69fc88 [FEATURE][processing] Create attribute index algorithm
Allows creation of an index on an attribute in a layer for faster
attribute based filtering

Support depends on the underlying data provider for the layer
2016-11-18 10:56:02 +10:00
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2016-10-05 12:39:01 +02:00
2016-01-08 08:27:22 +01:00