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b0b7be6133
This lets BRIN be used with R-Tree-like indexing strategies. Also provided are operator classes for range types, box and inet/cidr. The infrastructure provided here should be sufficient to create operator classes for similar datatypes; for instance, opclasses for PostGIS geometries should be doable, though we didn't try to implement one. (A box/point opclass was also submitted, but we ripped it out before commit because the handling of floating point comparisons in existing code is inconsistent and would generate corrupt indexes.) Author: Emre Hasegeli. Cosmetic changes by me Review: Andreas Karlsson