-- -- GEOMETRY -- -- Back off displayed precision a little bit to reduce platform-to-platform -- variation in results. SET extra_float_digits TO -3; -- -- Points -- SELECT '' AS four, center(f1) AS center FROM BOX_TBL; four | center ------+--------- | (1,1) | (2,2) | (2.5,3) | (3,3) (4 rows) SELECT '' AS four, (@@ f1) AS center FROM BOX_TBL; four | center ------+--------- | (1,1) | (2,2) | (2.5,3) | (3,3) (4 rows) SELECT '' AS six, point(f1) AS center FROM CIRCLE_TBL; six | center -----+----------- | (5,1) | (1,2) | (1,3) | (1,2) | (100,200) | (100,1) (6 rows) SELECT '' AS six, (@@ f1) AS center FROM CIRCLE_TBL; six | center -----+----------- | (5,1) | (1,2) | (1,3) | (1,2) | (100,200) | (100,1) (6 rows) SELECT '' AS two, (@@ f1) AS center FROM POLYGON_TBL WHERE (# f1) > 2; two | center -----+------------------------------- | (1.33333333333,1.33333333333) | (2.33333333333,1.33333333333) (2 rows) -- "is horizontal" function SELECT '' AS two, p1.f1 FROM POINT_TBL p1 WHERE ishorizontal(p1.f1, point '(0,0)'); two | f1 -----+--------- | (0,0) | (-10,0) (2 rows) -- "is horizontal" operator SELECT '' AS two, p1.f1 FROM POINT_TBL p1 WHERE p1.f1 ?- point '(0,0)'; two | f1 -----+--------- | (0,0) | (-10,0) (2 rows) -- "is vertical" function SELECT '' AS one, p1.f1 FROM POINT_TBL p1 WHERE isvertical(p1.f1, point '(5.1,34.5)'); one | f1 -----+------------ | (5.1,34.5) (1 row) -- "is vertical" operator SELECT '' AS one, p1.f1 FROM POINT_TBL p1 WHERE p1.f1 ?| point '(5.1,34.5)'; one | f1 -----+------------ | (5.1,34.5) (1 row) -- -- Line segments -- -- intersection SELECT '' AS count, p.f1, l.s, l.s # p.f1 AS intersection FROM LSEG_TBL l, POINT_TBL p; ERROR: operator does not exist: lseg # point LINE 1: SELECT '' AS count, p.f1, l.s, l.s # p.f1 AS intersection ^ HINT: No operator matches the given name and argument type(s). You might need to add explicit type casts. -- closest point SELECT '' AS thirty, p.f1, l.s, p.f1 ## l.s AS closest FROM LSEG_TBL l, POINT_TBL p; thirty | f1 | s | closest --------+------------+-------------------------------+---------------------------------- | (0,0) | [(1,2),(3,4)] | (1,2) | (0,0) | [(0,0),(6,6)] | (0,0) | (0,0) | [(10,-10),(-3,-4)] | (-2.0487804878,-4.43902439024) | (0,0) | [(-1000000,200),(300000,-40)] | (0.00284023658959,15.3846148603) | (0,0) | [(11,22),(33,44)] | (11,22) | (-10,0) | [(1,2),(3,4)] | (1,2) | (-10,0) | [(0,0),(6,6)] | (0,0) | (-10,0) | [(10,-10),(-3,-4)] | (-3,-4) | (-10,0) | [(-1000000,200),(300000,-40)] | (-9.99715942258,15.386461014) | (-10,0) | [(11,22),(33,44)] | (11,22) | (-3,4) | [(1,2),(3,4)] | (1,2) | (-3,4) | [(0,0),(6,6)] | (0.5,0.5) | (-3,4) | [(10,-10),(-3,-4)] | (-3,-4) | (-3,4) | [(-1000000,200),(300000,-40)] | (-2.99789812268,15.3851688427) | (-3,4) | [(11,22),(33,44)] | (11,22) | (5.1,34.5) | [(1,2),(3,4)] | (3,4) | (5.1,34.5) | [(0,0),(6,6)] | (6,6) | (5.1,34.5) | [(10,-10),(-3,-4)] | (-3,-4) | (5.1,34.5) | [(-1000000,200),(300000,-40)] | (5.09647083221,15.3836744977) | (5.1,34.5) | [(11,22),(33,44)] | (14.3,25.3) | (-5,-12) | [(1,2),(3,4)] | (1,2) | (-5,-12) | [(0,0),(6,6)] | (0,0) | (-5,-12) | [(10,-10),(-3,-4)] | (-1.60487804878,-4.64390243902) | (-5,-12) | [(-1000000,200),(300000,-40)] | (-4.99494420846,15.3855375282) | (-5,-12) | [(11,22),(33,44)] | (11,22) | (10,10) | [(1,2),(3,4)] | (3,4) | (10,10) | [(0,0),(6,6)] | (6,6) | (10,10) | [(10,-10),(-3,-4)] | (2.39024390244,-6.48780487805) | (10,10) | [(-1000000,200),(300000,-40)] | (10.000993742,15.3827690473) | (10,10) | [(11,22),(33,44)] | (11,22) (30 rows) -- -- Boxes -- SELECT '' as six, box(f1) AS box FROM CIRCLE_TBL; six | box -----+---------------------------------------------------------------- | (7.12132034356,3.12132034356),(2.87867965644,-1.12132034356) | (71.7106781187,72.7106781187),(-69.7106781187,-68.7106781187) | (4.53553390593,6.53553390593),(-2.53553390593,-0.535533905933) | (3.12132034356,4.12132034356),(-1.12132034356,-0.12132034356) | (107.071067812,207.071067812),(92.9289321881,192.928932188) | (181.317279836,82.3172798365),(18.6827201635,-80.3172798365) (6 rows) -- translation SELECT '' AS twentyfour, b.f1 + p.f1 AS translation FROM BOX_TBL b, POINT_TBL p; twentyfour | translation ------------+------------------------- | (2,2),(0,0) | (3,3),(1,1) | (2.5,3.5),(2.5,2.5) | (3,3),(3,3) | (-8,2),(-10,0) | (-7,3),(-9,1) | (-7.5,3.5),(-7.5,2.5) | (-7,3),(-7,3) | (-1,6),(-3,4) | (0,7),(-2,5) | (-0.5,7.5),(-0.5,6.5) | (0,7),(0,7) | (7.1,36.5),(5.1,34.5) | (8.1,37.5),(6.1,35.5) | (7.6,38),(7.6,37) | (8.1,37.5),(8.1,37.5) | (-3,-10),(-5,-12) | (-2,-9),(-4,-11) | (-2.5,-8.5),(-2.5,-9.5) | (-2,-9),(-2,-9) | (12,12),(10,10) | (13,13),(11,11) | (12.5,13.5),(12.5,12.5) | (13,13),(13,13) (24 rows) SELECT '' AS twentyfour, b.f1 - p.f1 AS translation FROM BOX_TBL b, POINT_TBL p; twentyfour | translation ------------+--------------------------- | (2,2),(0,0) | (3,3),(1,1) | (2.5,3.5),(2.5,2.5) | (3,3),(3,3) | (12,2),(10,0) | (13,3),(11,1) | (12.5,3.5),(12.5,2.5) | (13,3),(13,3) | (5,-2),(3,-4) | (6,-1),(4,-3) | (5.5,-0.5),(5.5,-1.5) | (6,-1),(6,-1) | (-3.1,-32.5),(-5.1,-34.5) | (-2.1,-31.5),(-4.1,-33.5) | (-2.6,-31),(-2.6,-32) | (-2.1,-31.5),(-2.1,-31.5) | (7,14),(5,12) | (8,15),(6,13) | (7.5,15.5),(7.5,14.5) | (8,15),(8,15) | (-8,-8),(-10,-10) | (-7,-7),(-9,-9) | (-7.5,-6.5),(-7.5,-7.5) | (-7,-7),(-7,-7) (24 rows) -- scaling and rotation SELECT '' AS twentyfour, b.f1 * p.f1 AS rotation FROM BOX_TBL b, POINT_TBL p; twentyfour | rotation ------------+----------------------------- | (0,0),(0,0) | (0,0),(0,0) | (0,0),(0,0) | (0,0),(0,0) | (-0,0),(-20,-20) | (-10,-10),(-30,-30) | (-25,-25),(-25,-35) | (-30,-30),(-30,-30) | (-0,2),(-14,0) | (-7,3),(-21,1) | (-17.5,2.5),(-21.5,-0.5) | (-21,3),(-21,3) | (0,79.2),(-58.8,0) | (-29.4,118.8),(-88.2,39.6) | (-73.5,104.1),(-108,99) | (-88.2,118.8),(-88.2,118.8) | (14,-0),(0,-34) | (21,-17),(7,-51) | (29.5,-42.5),(17.5,-47.5) | (21,-51),(21,-51) | (0,40),(0,0) | (0,60),(0,20) | (0,60),(-10,50) | (0,60),(0,60) (24 rows) SELECT '' AS twenty, b.f1 / p.f1 AS rotation FROM BOX_TBL b, POINT_TBL p WHERE (p.f1 <-> point '(0,0)') >= 1; twenty | rotation --------+---------------------------------------------------------------------- | (0,-0),(-0.2,-0.2) | (0.08,-0),(0,-0.56) | (0.0651176557644,0),(0,-0.0483449262493) | (-0,0.0828402366864),(-0.201183431953,0) | (0.2,0),(0,0) | (-0.1,-0.1),(-0.3,-0.3) | (0.12,-0.28),(0.04,-0.84) | (0.0976764836466,-0.0241724631247),(0.0325588278822,-0.072517389374) | (-0.100591715976,0.12426035503),(-0.301775147929,0.0414201183432) | (0.3,0),(0.1,0) | (-0.25,-0.25),(-0.25,-0.35) | (0.26,-0.7),(0.1,-0.82) | (0.109762715209,-0.0562379754329),(0.0813970697055,-0.0604311578117) | (-0.251479289941,0.103550295858),(-0.322485207101,0.0739644970414) | (0.3,0.05),(0.25,0) | (-0.3,-0.3),(-0.3,-0.3) | (0.12,-0.84),(0.12,-0.84) | (0.0976764836466,-0.072517389374),(0.0976764836466,-0.072517389374) | (-0.301775147929,0.12426035503),(-0.301775147929,0.12426035503) | (0.3,0),(0.3,0) (20 rows) SELECT f1::box FROM POINT_TBL; f1 ----------------------- (0,0),(0,0) (-10,0),(-10,0) (-3,4),(-3,4) (5.1,34.5),(5.1,34.5) (-5,-12),(-5,-12) (10,10),(10,10) (6 rows) SELECT bound_box(a.f1, b.f1) FROM BOX_TBL a, BOX_TBL b; bound_box --------------------- (2,2),(0,0) (3,3),(0,0) (2.5,3.5),(0,0) (3,3),(0,0) (3,3),(0,0) (3,3),(1,1) (3,3.5),(1,1) (3,3),(1,1) (2.5,3.5),(0,0) (3,3.5),(1,1) (2.5,3.5),(2.5,2.5) (3,3.5),(2.5,2.5) (3,3),(0,0) (3,3),(1,1) (3,3.5),(2.5,2.5) (3,3),(3,3) (16 rows) -- -- Paths -- SELECT '' AS eight, npoints(f1) AS npoints, f1 AS path FROM PATH_TBL; eight | npoints | path -------+---------+--------------------------- | 2 | [(1,2),(3,4)] | 2 | ((1,2),(3,4)) | 4 | [(0,0),(3,0),(4,5),(1,6)] | 2 | ((1,2),(3,4)) | 2 | ((1,2),(3,4)) | 2 | [(1,2),(3,4)] | 2 | [(11,12),(13,14)] | 2 | ((11,12),(13,14)) (8 rows) SELECT '' AS four, path(f1) FROM POLYGON_TBL; four | path ------+--------------------- | ((2,0),(2,4),(0,0)) | ((3,1),(3,3),(1,0)) | ((0,0)) | ((0,1),(0,1)) (4 rows) -- translation SELECT '' AS eight, p1.f1 + point '(10,10)' AS dist_add FROM PATH_TBL p1; eight | dist_add -------+----------------------------------- | [(11,12),(13,14)] | ((11,12),(13,14)) | [(10,10),(13,10),(14,15),(11,16)] | ((11,12),(13,14)) | ((11,12),(13,14)) | [(11,12),(13,14)] | [(21,22),(23,24)] | ((21,22),(23,24)) (8 rows) -- scaling and rotation SELECT '' AS eight, p1.f1 * point '(2,-1)' AS dist_mul FROM PATH_TBL p1; eight | dist_mul -------+------------------------------ | [(4,3),(10,5)] | ((4,3),(10,5)) | [(0,0),(6,-3),(13,6),(8,11)] | ((4,3),(10,5)) | ((4,3),(10,5)) | [(4,3),(10,5)] | [(34,13),(40,15)] | ((34,13),(40,15)) (8 rows) -- -- Polygons -- -- containment SELECT '' AS twentyfour, p.f1, poly.f1, poly.f1 @> p.f1 AS contains FROM POLYGON_TBL poly, POINT_TBL p; twentyfour | f1 | f1 | contains ------------+------------+---------------------+---------- | (0,0) | ((2,0),(2,4),(0,0)) | t | (0,0) | ((3,1),(3,3),(1,0)) | f | (0,0) | ((0,0)) | t | (0,0) | ((0,1),(0,1)) | f | (-10,0) | ((2,0),(2,4),(0,0)) | f | (-10,0) | ((3,1),(3,3),(1,0)) | f | (-10,0) | ((0,0)) | f | (-10,0) | ((0,1),(0,1)) | f | (-3,4) | ((2,0),(2,4),(0,0)) | f | (-3,4) | ((3,1),(3,3),(1,0)) | f | (-3,4) | ((0,0)) | f | (-3,4) | ((0,1),(0,1)) | f | (5.1,34.5) | ((2,0),(2,4),(0,0)) | f | (5.1,34.5) | ((3,1),(3,3),(1,0)) | f | (5.1,34.5) | ((0,0)) | f | (5.1,34.5) | ((0,1),(0,1)) | f | (-5,-12) | ((2,0),(2,4),(0,0)) | f | (-5,-12) | ((3,1),(3,3),(1,0)) | f | (-5,-12) | ((0,0)) | f | (-5,-12) | ((0,1),(0,1)) | f | (10,10) | ((2,0),(2,4),(0,0)) | f | (10,10) | ((3,1),(3,3),(1,0)) | f | (10,10) | ((0,0)) | f | (10,10) | ((0,1),(0,1)) | f (24 rows) SELECT '' AS twentyfour, p.f1, poly.f1, p.f1 <@ poly.f1 AS contained FROM POLYGON_TBL poly, POINT_TBL p; twentyfour | f1 | f1 | contained ------------+------------+---------------------+----------- | (0,0) | ((2,0),(2,4),(0,0)) | t | (0,0) | ((3,1),(3,3),(1,0)) | f | (0,0) | ((0,0)) | t | (0,0) | ((0,1),(0,1)) | f | (-10,0) | ((2,0),(2,4),(0,0)) | f | (-10,0) | ((3,1),(3,3),(1,0)) | f | (-10,0) | ((0,0)) | f | (-10,0) | ((0,1),(0,1)) | f | (-3,4) | ((2,0),(2,4),(0,0)) | f | (-3,4) | ((3,1),(3,3),(1,0)) | f | (-3,4) | ((0,0)) | f | (-3,4) | ((0,1),(0,1)) | f | (5.1,34.5) | ((2,0),(2,4),(0,0)) | f | (5.1,34.5) | ((3,1),(3,3),(1,0)) | f | (5.1,34.5) | ((0,0)) | f | (5.1,34.5) | ((0,1),(0,1)) | f | (-5,-12) | ((2,0),(2,4),(0,0)) | f | (-5,-12) | ((3,1),(3,3),(1,0)) | f | (-5,-12) | ((0,0)) | f | (-5,-12) | ((0,1),(0,1)) | f | (10,10) | ((2,0),(2,4),(0,0)) | f | (10,10) | ((3,1),(3,3),(1,0)) | f | (10,10) | ((0,0)) | f | (10,10) | ((0,1),(0,1)) | f (24 rows) SELECT '' AS four, npoints(f1) AS npoints, f1 AS polygon FROM POLYGON_TBL; four | npoints | polygon ------+---------+--------------------- | 3 | ((2,0),(2,4),(0,0)) | 3 | ((3,1),(3,3),(1,0)) | 1 | ((0,0)) | 2 | ((0,1),(0,1)) (4 rows) SELECT '' AS four, polygon(f1) FROM BOX_TBL; four | polygon ------+------------------------------------------- | ((0,0),(0,2),(2,2),(2,0)) | ((1,1),(1,3),(3,3),(3,1)) | ((2.5,2.5),(2.5,3.5),(2.5,3.5),(2.5,2.5)) | ((3,3),(3,3),(3,3),(3,3)) (4 rows) SELECT '' AS four, polygon(f1) FROM PATH_TBL WHERE isclosed(f1); four | polygon ------+------------------- | ((1,2),(3,4)) | ((1,2),(3,4)) | ((1,2),(3,4)) | ((11,12),(13,14)) (4 rows) SELECT '' AS four, f1 AS open_path, polygon( pclose(f1)) AS polygon FROM PATH_TBL WHERE isopen(f1); four | open_path | polygon ------+---------------------------+--------------------------- | [(1,2),(3,4)] | ((1,2),(3,4)) | [(0,0),(3,0),(4,5),(1,6)] | ((0,0),(3,0),(4,5),(1,6)) | [(1,2),(3,4)] | ((1,2),(3,4)) | [(11,12),(13,14)] | ((11,12),(13,14)) (4 rows) -- convert circles to polygons using the default number of points SELECT '' AS six, polygon(f1) FROM CIRCLE_TBL; six | polygon -----+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ((2,1),(2.40192378865,2.5),(3.5,3.59807621135),(5,4),(6.5,3.59807621135),(7.59807621135,2.5),(8,1),(7.59807621135,-0.5),(6.5,-1.59807621135),(5,-2),(3.5,-1.59807621135),(2.40192378865,-0.5)) | ((-99,2),(-85.6025403784,52),(-49,88.6025403784),(1,102),(51,88.6025403784),(87.6025403784,52),(101,2),(87.6025403784,-48),(51,-84.6025403784),(1,-98),(-49,-84.6025403784),(-85.6025403784,-48)) | ((-4,3),(-3.33012701892,5.5),(-1.5,7.33012701892),(1,8),(3.5,7.33012701892),(5.33012701892,5.5),(6,3),(5.33012701892,0.5),(3.5,-1.33012701892),(1,-2),(-1.5,-1.33012701892),(-3.33012701892,0.5)) | ((-2,2),(-1.59807621135,3.5),(-0.5,4.59807621135),(1,5),(2.5,4.59807621135),(3.59807621135,3.5),(4,2),(3.59807621135,0.5),(2.5,-0.598076211353),(1,-1),(-0.5,-0.598076211353),(-1.59807621135,0.5)) | ((90,200),(91.3397459622,205),(95,208.660254038),(100,210),(105,208.660254038),(108.660254038,205),(110,200),(108.660254038,195),(105,191.339745962),(100,190),(95,191.339745962),(91.3397459622,195)) | ((-15,1),(0.40707856479,58.5),(42.5,100.592921435),(100,116),(157.5,100.592921435),(199.592921435,58.5),(215,1),(199.592921435,-56.5),(157.5,-98.5929214352),(100,-114),(42.5,-98.5929214352),(0.40707856479,-56.5)) (6 rows) -- convert the circle to an 8-point polygon SELECT '' AS six, polygon(8, f1) FROM CIRCLE_TBL; six | polygon -----+------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ((2,1),(2.87867965644,3.12132034356),(5,4),(7.12132034356,3.12132034356),(8,1),(7.12132034356,-1.12132034356),(5,-2),(2.87867965644,-1.12132034356)) | ((-99,2),(-69.7106781187,72.7106781187),(1,102),(71.7106781187,72.7106781187),(101,2),(71.7106781187,-68.7106781187),(1,-98),(-69.7106781187,-68.7106781187)) | ((-4,3),(-2.53553390593,6.53553390593),(1,8),(4.53553390593,6.53553390593),(6,3),(4.53553390593,-0.535533905933),(1,-2),(-2.53553390593,-0.535533905933)) | ((-2,2),(-1.12132034356,4.12132034356),(1,5),(3.12132034356,4.12132034356),(4,2),(3.12132034356,-0.12132034356),(1,-1),(-1.12132034356,-0.12132034356)) | ((90,200),(92.9289321881,207.071067812),(100,210),(107.071067812,207.071067812),(110,200),(107.071067812,192.928932188),(100,190),(92.9289321881,192.928932188)) | ((-15,1),(18.6827201635,82.3172798365),(100,116),(181.317279836,82.3172798365),(215,1),(181.317279836,-80.3172798365),(100,-114),(18.6827201635,-80.3172798365)) (6 rows) -- -- Circles -- SELECT '' AS six, circle(f1, 50.0) FROM POINT_TBL; six | circle -----+----------------- | <(0,0),50> | <(-10,0),50> | <(-3,4),50> | <(5.1,34.5),50> | <(-5,-12),50> | <(10,10),50> (6 rows) SELECT '' AS four, circle(f1) FROM BOX_TBL; four | circle ------+----------------------- | <(1,1),1.41421356237> | <(2,2),1.41421356237> | <(2.5,3),0.5> | <(3,3),0> (4 rows) SELECT '' AS two, circle(f1) FROM POLYGON_TBL WHERE (# f1) >= 3; two | circle -----+----------------------------------------------- | <(1.33333333333,1.33333333333),2.04168905064> | <(2.33333333333,1.33333333333),1.47534300379> (2 rows) SELECT '' AS twentyfour, c1.f1 AS circle, p1.f1 AS point, (p1.f1 <-> c1.f1) AS distance FROM CIRCLE_TBL c1, POINT_TBL p1 WHERE (p1.f1 <-> c1.f1) > 0 ORDER BY distance, area(c1.f1), p1.f1[0]; twentyfour | circle | point | distance ------------+----------------+------------+--------------- | <(1,2),3> | (-3,4) | 1.472135955 | <(5,1),3> | (0,0) | 2.09901951359 | <(5,1),3> | (-3,4) | 5.54400374532 | <(1,3),5> | (-10,0) | 6.40175425099 | <(1,3),5> | (10,10) | 6.40175425099 | <(5,1),3> | (10,10) | 7.29563014099 | <(1,2),3> | (-10,0) | 8.1803398875 | <(1,2),3> | (10,10) | 9.04159457879 | <(1,3),5> | (-5,-12) | 11.1554944214 | <(5,1),3> | (-10,0) | 12.0332963784 | <(1,2),3> | (-5,-12) | 12.2315462117 | <(5,1),3> | (-5,-12) | 13.4012194669 | <(1,3),5> | (5.1,34.5) | 26.7657047773 | <(1,2),3> | (5.1,34.5) | 29.7575945393 | <(5,1),3> | (5.1,34.5) | 30.5001492534 | <(100,200),10> | (5.1,34.5) | 180.778038568 | <(100,200),10> | (10,10) | 200.237960416 | <(100,200),10> | (-3,4) | 211.415898255 | <(100,200),10> | (0,0) | 213.60679775 | <(100,200),10> | (-10,0) | 218.25424421 | <(100,200),10> | (-5,-12) | 226.577682802 (21 rows)