126 lines
3.2 KiB
Plaintext
126 lines
3.2 KiB
Plaintext
--
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-- CIRCLE
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--
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-- Back off displayed precision a little bit to reduce platform-to-platform
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-- variation in results.
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SET extra_float_digits = -1;
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CREATE TABLE CIRCLE_TBL (f1 circle);
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INSERT INTO CIRCLE_TBL VALUES ('<(5,1),3>');
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INSERT INTO CIRCLE_TBL VALUES ('((1,2),100)');
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INSERT INTO CIRCLE_TBL VALUES (' 1 , 3 , 5 ');
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INSERT INTO CIRCLE_TBL VALUES (' ( ( 1 , 2 ) , 3 ) ');
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INSERT INTO CIRCLE_TBL VALUES (' ( 100 , 200 ) , 10 ');
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INSERT INTO CIRCLE_TBL VALUES (' < ( 100 , 1 ) , 115 > ');
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INSERT INTO CIRCLE_TBL VALUES ('<(3,5),0>'); -- Zero radius
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INSERT INTO CIRCLE_TBL VALUES ('<(3,5),NaN>'); -- NaN radius
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-- bad values
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INSERT INTO CIRCLE_TBL VALUES ('<(-100,0),-100>');
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ERROR: invalid input syntax for type circle: "<(-100,0),-100>"
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LINE 1: INSERT INTO CIRCLE_TBL VALUES ('<(-100,0),-100>');
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^
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INSERT INTO CIRCLE_TBL VALUES ('<(100,200),10');
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ERROR: invalid input syntax for type circle: "<(100,200),10"
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LINE 1: INSERT INTO CIRCLE_TBL VALUES ('<(100,200),10');
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^
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INSERT INTO CIRCLE_TBL VALUES ('<(100,200),10> x');
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ERROR: invalid input syntax for type circle: "<(100,200),10> x"
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LINE 1: INSERT INTO CIRCLE_TBL VALUES ('<(100,200),10> x');
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^
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INSERT INTO CIRCLE_TBL VALUES ('1abc,3,5');
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ERROR: invalid input syntax for type circle: "1abc,3,5"
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LINE 1: INSERT INTO CIRCLE_TBL VALUES ('1abc,3,5');
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^
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INSERT INTO CIRCLE_TBL VALUES ('(3,(1,2),3)');
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ERROR: invalid input syntax for type circle: "(3,(1,2),3)"
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LINE 1: INSERT INTO CIRCLE_TBL VALUES ('(3,(1,2),3)');
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^
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SELECT * FROM CIRCLE_TBL;
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f1
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----------------
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<(5,1),3>
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<(1,2),100>
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<(1,3),5>
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<(1,2),3>
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<(100,200),10>
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<(100,1),115>
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<(3,5),0>
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<(3,5),NaN>
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(8 rows)
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SELECT center(f1) AS center
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FROM CIRCLE_TBL;
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center
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-----------
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(5,1)
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(1,2)
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(1,3)
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(1,2)
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(100,200)
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(100,1)
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(3,5)
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(3,5)
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(8 rows)
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SELECT radius(f1) AS radius
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FROM CIRCLE_TBL;
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radius
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--------
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3
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100
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5
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3
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10
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115
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0
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NaN
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(8 rows)
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SELECT diameter(f1) AS diameter
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FROM CIRCLE_TBL;
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diameter
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----------
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6
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200
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10
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6
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20
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230
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0
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NaN
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(8 rows)
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SELECT f1 FROM CIRCLE_TBL WHERE radius(f1) < 5;
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f1
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-----------
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<(5,1),3>
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<(1,2),3>
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<(3,5),0>
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(3 rows)
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SELECT f1 FROM CIRCLE_TBL WHERE diameter(f1) >= 10;
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f1
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----------------
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<(1,2),100>
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<(1,3),5>
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<(100,200),10>
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<(100,1),115>
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<(3,5),NaN>
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(5 rows)
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SELECT c1.f1 AS one, c2.f1 AS two, (c1.f1 <-> c2.f1) AS distance
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FROM CIRCLE_TBL c1, CIRCLE_TBL c2
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WHERE (c1.f1 < c2.f1) AND ((c1.f1 <-> c2.f1) > 0)
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ORDER BY distance, area(c1.f1), area(c2.f1);
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one | two | distance
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----------------+----------------+------------------
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<(3,5),0> | <(1,2),3> | 0.60555127546399
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<(3,5),0> | <(5,1),3> | 1.4721359549996
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<(100,200),10> | <(100,1),115> | 74
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<(100,200),10> | <(1,2),100> | 111.37072977248
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<(1,3),5> | <(100,200),10> | 205.4767561445
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<(5,1),3> | <(100,200),10> | 207.51303816328
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<(3,5),0> | <(100,200),10> | 207.79348015953
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<(1,2),3> | <(100,200),10> | 208.37072977248
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(8 rows)
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