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Wiki / 数据类型

box

rectangular box on a plane

当前阅读 PG 18·选择有来源记录的版本

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此版本暂无所选语言的定义，以下显示原始英文内容。

Catalog name
pg_catalog.box
Type OID
603
Type kind
Base type
Declared length
32 bytes
Storage strategy
plain
Input function
box_in
Output function
box_out
Documented declaration
box
Storage Size
32 bytes
Manual description
Rectangular box
Representation
(x1,y1),(x2,y2)
aliases
未知
coverage
source inventory; exact declared input types for operator classes
manual documentation
dedicated family chapter
manual path
datatype-geometric.html
ranges
未知
signature
box

版本定义 PG 18

8.8. Geometric Types

Geometric data types represent two-dimensional spatial objects. Table 8.20 shows the geometric types available in PostgreSQL.

Table 8.20. Geometric Types

Name Storage Size Description Representation
point 16 bytes Point on a plane (x,y)
line 24 bytes Infinite line {A,B,C}
lseg 32 bytes Finite line segment [(x1,y1),(x2,y2)]
box 32 bytes Rectangular box (x1,y1),(x2,y2)
path 16+16n bytes Closed path (similar to polygon) ((x1,y1),...)
path 16+16n bytes Open path [(x1,y1),...]
polygon 40+16n bytes Polygon (similar to closed path) ((x1,y1),...)
circle 24 bytes Circle <(x,y),r> (center point and radius)

In all these types, the individual coordinates are stored as double precision (float8) numbers.

A rich set of functions and operators is available to perform various geometric operations such as scaling, translation, rotation, and determining intersections. They are explained in Section 9.11.

8.8.1. Points

Points are the fundamental two-dimensional building block for geometric types. Values of type point are specified using either of the following syntaxes:

( x , y )
  x , y

where x and y are the respective coordinates, as floating-point numbers.

Points are output using the first syntax.

8.8.2. Lines

Lines are represented by the linear equation Ax + By + C = 0, where A and B are not both zero. Values of type line are input and output in the following form:

{ A, B, C }

Alternatively, any of the following forms can be used for input:

[ ( x1 , y1 ) , ( x2 , y2 ) ]
( ( x1 , y1 ) , ( x2 , y2 ) )
  ( x1 , y1 ) , ( x2 , y2 )
    x1 , y1   ,   x2 , y2

where (x1,y1) and (x2,y2) are two different points on the line.

8.8.3. Line Segments

Line segments are represented by pairs of points that are the endpoints of the segment. Values of type lseg are specified using any of the following syntaxes:

[ ( x1 , y1 ) , ( x2 , y2 ) ]
( ( x1 , y1 ) , ( x2 , y2 ) )
  ( x1 , y1 ) , ( x2 , y2 )
    x1 , y1   ,   x2 , y2

where (x1,y1) and (x2,y2) are the end points of the line segment.

Line segments are output using the first syntax.

8.8.4. Boxes

Boxes are represented by pairs of points that are opposite corners of the box. Values of type box are specified using any of the following syntaxes:

( ( x1 , y1 ) , ( x2 , y2 ) )
  ( x1 , y1 ) , ( x2 , y2 )
    x1 , y1   ,   x2 , y2

where (x1,y1) and (x2,y2) are any two opposite corners of the box.

Boxes are output using the second syntax.

Any two opposite corners can be supplied on input, but the values will be reordered as needed to store the upper right and lower left corners, in that order.

8.8.5. Paths

Paths are represented by lists of connected points. Paths can be open, where the first and last points in the list are considered not connected, or closed, where the first and last points are considered connected.

Values of type path are specified using any of the following syntaxes:

[ ( x1 , y1 ) , ... , ( xn , yn ) ]
( ( x1 , y1 ) , ... , ( xn , yn ) )
  ( x1 , y1 ) , ... , ( xn , yn )
  ( x1 , y1   , ... ,   xn , yn )
    x1 , y1   , ... ,   xn , yn

where the points are the end points of the line segments comprising the path. Square brackets ([]) indicate an open path, while parentheses (()) indicate a closed path. When the outermost parentheses are omitted, as in the third through fifth syntaxes, a closed path is assumed.

Paths are output using the first or second syntax, as appropriate.

8.8.6. Polygons

Polygons are represented by lists of points (the vertices of the polygon). Polygons are very similar to closed paths; the essential semantic difference is that a polygon is considered to include the area within it, while a path is not.

An important implementation difference between polygons and paths is that the stored representation of a polygon includes its smallest bounding box. This speeds up certain search operations, although computing the bounding box adds overhead while constructing new polygons.

Values of type polygon are specified using any of the following syntaxes:

( ( x1 , y1 ) , ... , ( xn , yn ) )
  ( x1 , y1 ) , ... , ( xn , yn )
  ( x1 , y1   , ... ,   xn , yn )
    x1 , y1   , ... ,   xn , yn

where the points are the end points of the line segments comprising the boundary of the polygon.

Polygons are output using the first syntax.

8.8.7. Circles

Circles are represented by a center point and radius. Values of type circle are specified using any of the following syntaxes:

< ( x , y ) , r >
( ( x , y ) , r )
  ( x , y ) , r
    x , y   , r

where (x,y) is the center point and r is the radius of the circle.

Circles are output using the first syntax.

比较版本

完整来源事实

casts

map[castcontext:a castfunc:box(point) castmethod:f castsource:point casttarget:box], map[castcontext:e castfunc:point(box) castmethod:f castsource:box casttarget:point], map[castcontext:e castfunc:lseg(box) castmethod:f castsource:box casttarget:lseg], map[castcontext:a castfunc:polygon(box) castmethod:f castsource:box casttarget:polygon], map[castcontext:e castfunc:circle(box) castmethod:f castsource:box casttarget:circle], map[castcontext:e castfunc:box(polygon) castmethod:f castsource:polygon casttarget:box], map[castcontext:e castfunc:box(circle) castmethod:f castsource:circle casttarget:box]

catalog

{"array_type_name":"_box","array_type_oid":"1020","descr":"geometric box, format 'lower left point,upper right point'","oid":"603","typacl":"_null_","typalign":"d","typanalyze":"-","typarray":"0","typbasetype":"0","typbyval":"f","typcategory":"G","typcollation":"0","typdefault":"_null_","typdefaultbin":"_null_","typdelim":";","typelem":"point","typinput":"box_in","typisdefined":"t","typispreferred":"f","typlen":"32","typmodin":"-","typmodout":"-","typname":"box","typnamespace":"pg_catalog","typndims":"0","typnotnull":"f","typoutput":"box_out","typowner":"POSTGRES","typreceive":"box_recv","typrelid":"0","typsend":"box_send","typstorage":"p","typsubscript":"raw_array_subscript_handler","typtype":"b","typtypmod":"-1"}

operator classes

map[opcdefault:t opcfamily:gist/box_ops opcintype:box opckeytype:0 opcmethod:gist opcname:box_ops opcnamespace:pg_catalog opcowner:POSTGRES], map[opcdefault:t opcfamily:spgist/box_ops opcintype:box opckeytype:0 opcmethod:spgist opcname:box_ops opcnamespace:pg_catalog opcowner:POSTGRES], map[opcdefault:t opcfamily:brin/box_inclusion_ops opcintype:box opckeytype:box opcmethod:brin opcname:box_inclusion_ops opcnamespace:pg_catalog opcowner:POSTGRES]

operators

map[descr:is left of oid:493 oprcanhash:f oprcanmerge:f oprcode:box_left oprcom:0 oprjoin:positionjoinsel oprkind:b oprleft:box oprname:<< oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:positionsel oprresult:bool oprright:box], map[descr:overlaps or is left of oid:494 oprcanhash:f oprcanmerge:f oprcode:box_overleft oprcom:0 oprjoin:positionjoinsel oprkind:b oprleft:box oprname:&< oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:positionsel oprresult:bool oprright:box], map[descr:overlaps or is right of oid:495 oprcanhash:f oprcanmerge:f oprcode:box_overright oprcom:0 oprjoin:positionjoinsel oprkind:b oprleft:box oprname:&> oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:positionsel oprresult:bool oprright:box], map[descr:is right of oid:496 oprcanhash:f oprcanmerge:f oprcode:box_right oprcom:0 oprjoin:positionjoinsel oprkind:b oprleft:box oprname:>> oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:positionsel oprresult:bool oprright:box], map[descr:is contained by oid:497 oprcanhash:f oprcanmerge:f oprcode:box_contained oprcom:@>(box,box) oprjoin:contjoinsel oprkind:b oprleft:box oprname:<@ oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:contsel oprresult:bool oprright:box], map[descr:contains oid:498 oprcanhash:f oprcanmerge:f oprcode:box_contain oprcom:<@(box,box) oprjoin:contjoinsel oprkind:b oprleft:box oprname:@> oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:contsel oprresult:bool oprright:box], map[descr:same as oid:499 oprcanhash:f oprcanmerge:f oprcode:box_same oprcom:~=(box,box) oprjoin:eqjoinsel oprkind:b oprleft:box oprname:~= oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:eqsel oprresult:bool oprright:box], map[descr:overlaps oid:500 oprcanhash:f oprcanmerge:f oprcode:box_overlap oprcom:&&(box,box) oprjoin:areajoinsel oprkind:b oprleft:box oprname:&& oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:areasel oprresult:bool oprright:box], map[descr:greater than or equal by area oid:501 oprcanhash:f oprcanmerge:f oprcode:box_ge oprcom:<=(box,box) oprjoin:areajoinsel oprkind:b oprleft:box oprname:>= oprnamespace:pg_catalog oprnegate:<(box,box) oprowner:POSTGRES oprrest:areasel oprresult:bool oprright:box], map[descr:greater than by area oid:502 oprcanhash:f oprcanmerge:f oprcode:box_gt oprcom:<(box,box) oprjoin:areajoinsel oprkind:b oprleft:box oprname:> oprnamespace:pg_catalog oprnegate:<=(box,box) oprowner:POSTGRES oprrest:areasel oprresult:bool oprright:box], map[descr:equal by area oid:503 oprcanhash:f oprcanmerge:f oprcode:box_eq oprcom:=(box,box) oprjoin:eqjoinsel oprkind:b oprleft:box oprname:= oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:eqsel oprresult:bool oprright:box], map[descr:less than by area oid:504 oprcanhash:f oprcanmerge:f oprcode:box_lt oprcom:>(box,box) oprjoin:areajoinsel oprkind:b oprleft:box oprname:< oprnamespace:pg_catalog oprnegate:>=(box,box) oprowner:POSTGRES oprrest:areasel oprresult:bool oprright:box], map[descr:less than or equal by area oid:505 oprcanhash:f oprcanmerge:f oprcode:box_le oprcom:>=(box,box) oprjoin:areajoinsel oprkind:b oprleft:box oprname:<= oprnamespace:pg_catalog oprnegate:>(box,box) oprowner:POSTGRES oprrest:areasel oprresult:bool oprright:box], map[descr:point inside box oid:511 oprcanhash:f oprcanmerge:f oprcode:on_pb oprcom:@>(box,point) oprjoin:contjoinsel oprkind:b oprleft:point oprname:<@ oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:contsel oprresult:bool oprright:box], map[descr:contains oid:433 oprcanhash:f oprcanmerge:f oprcode:box_contain_pt oprcom:<@(point,box) oprjoin:contjoinsel oprkind:b oprleft:box oprname:@> oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:contsel oprresult:bool oprright:point], map[descr:center of oid:513 oprcanhash:f oprcanmerge:f oprcode:box_center oprcom:0 oprjoin:- oprkind:l oprleft:0 oprname:@@ oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:- oprresult:point oprright:box], map[descr:distance between oid:615 oprcanhash:f oprcanmerge:f oprcode:dist_pb oprcom:<->(box,point) oprjoin:- oprkind:b oprleft:point oprname:<-> oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:- oprresult:float8 oprright:box], map[descr:distance between oid:606 oprcanhash:f oprcanmerge:f oprcode:dist_bp oprcom:<->(point,box) oprjoin:- oprkind:b oprleft:box oprname:<-> oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:- oprresult:float8 oprright:point], map[descr:distance between oid:617 oprcanhash:f oprcanmerge:f oprcode:dist_sb oprcom:<->(box,lseg) oprjoin:- oprkind:b oprleft:lseg oprname:<-> oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:- oprresult:float8 oprright:box], map[descr:distance between oid:763 oprcanhash:f oprcanmerge:f oprcode:dist_bs oprcom:<->(lseg,box) oprjoin:- oprkind:b oprleft:box oprname:<-> oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:- oprresult:float8 oprright:lseg], map[descr:distance between oid:706 oprcanhash:f oprcanmerge:f oprcode:box_distance oprcom:<->(box,box) oprjoin:- oprkind:b oprleft:box oprname:<-> oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:- oprresult:float8 oprright:box], map[descr:is above (allows touching) oid:800 oprcanhash:f oprcanmerge:f oprcode:box_above_eq oprcom:0 oprjoin:positionjoinsel oprkind:b oprleft:box oprname:>^ oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:positionsel oprresult:bool oprright:box], map[descr:is below (allows touching) oid:801 oprcanhash:f oprcanmerge:f oprcode:box_below_eq oprcom:0 oprjoin:positionjoinsel oprkind:b oprleft:box oprname:<^ oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:positionsel oprresult:bool oprright:box], map[descr:deprecated, use && instead oid:802 oprcanhash:f oprcanmerge:f oprcode:box_overlap oprcom:0 oprjoin:areajoinsel oprkind:b oprleft:box oprname:?# oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:areasel oprresult:bool oprright:box], map[descr:box intersection oid:803 oprcanhash:f oprcanmerge:f oprcode:box_intersect oprcom:0 oprjoin:- oprkind:b oprleft:box oprname:# oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:- oprresult:box oprright:box], map[descr:add point to box (translate) oid:804 oprcanhash:f oprcanmerge:f oprcode:box_add oprcom:0 oprjoin:- oprkind:b oprleft:box oprname:+ oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:- oprresult:box oprright:point], map[descr:subtract point from box (translate) oid:805 oprcanhash:f oprcanmerge:f oprcode:box_sub oprcom:0 oprjoin:- oprkind:b oprleft:box oprname:- oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:- oprresult:box oprright:point], map[descr:multiply box by point (scale) oid:806 oprcanhash:f oprcanmerge:f oprcode:box_mul oprcom:0 oprjoin:- oprkind:b oprleft:box oprname:* oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:- oprresult:box oprright:point], map[descr:divide box by point (scale) oid:807 oprcanhash:f oprcanmerge:f oprcode:box_div oprcom:0 oprjoin:- oprkind:b oprleft:box oprname:/ oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:- oprresult:box oprright:point], map[descr:intersect oid:1538 oprcanhash:f oprcanmerge:f oprcode:inter_sb oprcom:0 oprjoin:- oprkind:b oprleft:lseg oprname:?# oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:- oprresult:bool oprright:box], map[descr:intersect oid:1539 oprcanhash:f oprcanmerge:f oprcode:inter_lb oprcom:0 oprjoin:- oprkind:b oprleft:line oprname:?# oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:- oprresult:bool oprright:box], map[descr:is contained by oid:1549 oprcanhash:f oprcanmerge:f oprcode:on_sb oprcom:0 oprjoin:- oprkind:b oprleft:lseg oprname:<@ oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:- oprresult:bool oprright:box], map[descr:closest point to A on B oid:1559 oprcanhash:f oprcanmerge:f oprcode:close_pb oprcom:0 oprjoin:- oprkind:b oprleft:point oprname:## oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:- oprresult:point oprright:box], map[descr:closest point to A on B oid:1567 oprcanhash:f oprcanmerge:f oprcode:close_sb oprcom:0 oprjoin:- oprkind:b oprleft:lseg oprname:## oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:- oprresult:point oprright:box], map[descr:is below oid:2570 oprcanhash:f oprcanmerge:f oprcode:box_below oprcom:0 oprjoin:positionjoinsel oprkind:b oprleft:box oprname:<<| oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:positionsel oprresult:bool oprright:box], map[descr:overlaps or is below oid:2571 oprcanhash:f oprcanmerge:f oprcode:box_overbelow oprcom:0 oprjoin:positionjoinsel oprkind:b oprleft:box oprname:&<| oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:positionsel oprresult:bool oprright:box], map[descr:overlaps or is above oid:2572 oprcanhash:f oprcanmerge:f oprcode:box_overabove oprcom:0 oprjoin:positionjoinsel oprkind:b oprleft:box oprname:|&> oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:positionsel oprresult:bool oprright:box], map[descr:is above oid:2573 oprcanhash:f oprcanmerge:f oprcode:box_above oprcom:0 oprjoin:positionjoinsel oprkind:b oprleft:box oprname:|>> oprnamespace:pg_catalog oprnegate:0 oprowner:POSTGRES oprrest:positionsel oprresult:bool oprright:box]

来源引用

完整定义与证据 JSON

定义来源

center · PostgreSQL 18 · 555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f

正文语言: en · 555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f