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per-column options for btree indexes. The planner's support for this is still pretty rudimentary; it does not yet know how to plan mergejoins with nondefault ordering options. The documentation is pretty rudimentary, too. I'll work on improving that stuff later. Note incompatible change from prior behavior: ORDER BY ... USING will now be rejected if the operator is not a less-than or greater-than member of some btree opclass. This prevents less-than-sane behavior if an operator that doesn't actually define a proper sort ordering is selected.
94 lines
2.3 KiB
Plaintext
94 lines
2.3 KiB
Plaintext
--
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-- CIRCLE
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--
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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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-- 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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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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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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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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(6 rows)
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SELECT '' AS six, center(f1) AS center
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FROM CIRCLE_TBL;
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six | 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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(6 rows)
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SELECT '' AS six, radius(f1) AS radius
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FROM CIRCLE_TBL;
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six | 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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(6 rows)
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SELECT '' AS six, diameter(f1) AS diameter
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FROM CIRCLE_TBL;
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six | 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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(6 rows)
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SELECT '' AS two, f1 FROM CIRCLE_TBL WHERE radius(f1) < 5;
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two | f1
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-----+-----------
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| <(5,1),3>
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| <(1,2),3>
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(2 rows)
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SELECT '' AS four, f1 FROM CIRCLE_TBL WHERE diameter(f1) >= 10;
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four | 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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(4 rows)
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SELECT '' as five, 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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five | one | two | distance
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------+----------------+----------------+------------------
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| <(100,200),10> | <(100,1),115> | 74
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| <(100,200),10> | <(1,2),100> | 111.370729772479
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| <(1,3),5> | <(100,200),10> | 205.476756144497
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| <(5,1),3> | <(100,200),10> | 207.51303816328
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| <(1,2),3> | <(100,200),10> | 208.370729772479
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(5 rows)
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