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Add geometry/range functions to support BRIN inclusion

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This commit adds the following functions:
    box(point) -> box
    bound_box(box, box) -> box
    inet_same_family(inet, inet) -> bool
    inet_merge(inet, inet) -> cidr
    range_merge(anyrange, anyrange) -> anyrange

The first of these is also used to implement a new assignment cast from
point to box.

These functions are the first part of a base to implement an "inclusion"
operator class for BRIN, for multidimensional data types.

Author: Emre Hasegeli
Reviewed by: Andreas Karlsson
This commit is contained in:
Alvaro Herrera
2015-05-05 15:22:24 -03:00
parent 456ff08638
commit 3b6db1f445
18 changed files with 363 additions and 16 deletions
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39
src/backend/utils/adt/geo_ops.c
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@@ -4227,6 +4227,45 @@ box_div(PG_FUNCTION_ARGS)
PG_RETURN_BOX_P(result);
}
/*
* Convert point to empty box
*/
Datum
point_box(PG_FUNCTION_ARGS)
{
Point *pt = PG_GETARG_POINT_P(0);
BOX *box;
box = (BOX *) palloc(sizeof(BOX));
box->high.x = pt->x;
box->low.x = pt->x;
box->high.y = pt->y;
box->low.y = pt->y;
PG_RETURN_BOX_P(box);
}
/*
* Smallest bounding box that includes both of the given boxes
*/
Datum
boxes_bound_box(PG_FUNCTION_ARGS)
{
BOX *box1 = PG_GETARG_BOX_P(0),
*box2 = PG_GETARG_BOX_P(1),
*container;
container = (BOX *) palloc(sizeof(BOX));
container->high.x = Max(box1->high.x, box2->high.x);
container->low.x = Min(box1->low.x, box2->low.x);
container->high.y = Max(box1->high.y, box2->high.y);
container->low.y = Min(box1->low.y, box2->low.y);
PG_RETURN_BOX_P(container);
}
/***********************************************************************
**