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Diffstat (limited to 'contrib/cube/README.cube')
| -rw-r--r-- | contrib/cube/README.cube | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/contrib/cube/README.cube b/contrib/cube/README.cube index 9617009eb2c..bc28c6ec313 100644 --- a/contrib/cube/README.cube +++ b/contrib/cube/README.cube @@ -244,6 +244,16 @@ cube(float8, float8) returns cube This makes a one dimensional cube. cube(1,2) == '(1),(2)' +cube(float8[]) returns cube + This makes a zero-volume cube using the coordinates defined by the + array. + cube(ARRAY[1,2]) == '(1,2)' + +cube(float8[], float8[]) returns cube + This makes a cube, with upper right and lower left coordinates as + defined by the 2 float arrays. Arrays must be of the same length. + cube('{1,2}'::float[], '{3,4}'::float[]) == '(1,2),(3,4)' + cube(cube, float8) returns cube This builds a new cube by adding a dimension on to an existing cube with the same values for both parts of the new coordinate. This is useful for @@ -267,6 +277,13 @@ cube_ur_coord(cube, int) returns double cube_ur_coord returns the nth coordinate value for the upper right corner of a cube. This is useful for doing coordinate transformations. +cube_subset(cube, int[]) returns cube + Builds a new cube from an existing cube, using a list of dimension indexes + from an array. Can be used to find both the ll and ur coordinate of single + dimenion, e.g.: cube_subset(cube('(1,3,5),(6,7,8)'), ARRAY[2]) = '(3),(7)' + Or can be used to drop dimensions, or reorder them as desired, e.g.: + cube_subset(cube('(1,3,5),(6,7,8)'), ARRAY[3,2,1,1]) = '(5, 3, 1, 1),(8, 7, 6, 6)' + cube_is_point(cube) returns bool cube_is_point returns true if a cube is also a point. This is true when the two defining corners are the same. @@ -327,3 +344,10 @@ in August/September of 2002. These include changing the precision from single precision to double precision and adding some new functions. + +------------------------------------------------------------------------ + +Additional updates were made by Joshua Reich <josh@root.net> in July 2006. + +These include cube(float8[], float8[]) and cleaning up the code to use +the V1 call protocol instead of the deprecated V0 form. |