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ba920e1c91
agreed these symbols are less easily confused. I made new pg_operator entries (with new OIDs) for the old names, so as to provide backward compatibility while making it pretty easy to remove the old names in some future release cycle. This commit only touches the core datatypes, contrib will be fixed separately.
120 lines
2.4 KiB
SQL
120 lines
2.4 KiB
SQL
--
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-- BOX
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--
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--
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-- box logic
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-- o
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-- 3 o--|X
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-- | o|
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-- 2 +-+-+ |
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-- | | | |
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-- 1 | o-+-o
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-- | |
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-- 0 +---+
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--
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-- 0 1 2 3
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--
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-- boxes are specified by two points, given by four floats x1,y1,x2,y2
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CREATE TABLE BOX_TBL (f1 box);
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INSERT INTO BOX_TBL (f1) VALUES ('(2.0,2.0,0.0,0.0)');
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INSERT INTO BOX_TBL (f1) VALUES ('(1.0,1.0,3.0,3.0)');
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-- degenerate cases where the box is a line or a point
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-- note that lines and points boxes all have zero area
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INSERT INTO BOX_TBL (f1) VALUES ('(2.5, 2.5, 2.5,3.5)');
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INSERT INTO BOX_TBL (f1) VALUES ('(3.0, 3.0,3.0,3.0)');
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-- badly formatted box inputs
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INSERT INTO BOX_TBL (f1) VALUES ('(2.3, 4.5)');
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INSERT INTO BOX_TBL (f1) VALUES ('asdfasdf(ad');
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SELECT '' AS four, * FROM BOX_TBL;
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SELECT '' AS four, b.*, area(b.f1) as barea
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FROM BOX_TBL b;
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-- overlap
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SELECT '' AS three, b.f1
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FROM BOX_TBL b
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WHERE b.f1 && box '(2.5,2.5,1.0,1.0)';
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-- left-or-overlap (x only)
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SELECT '' AS two, b1.*
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FROM BOX_TBL b1
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WHERE b1.f1 &< box '(2.0,2.0,2.5,2.5)';
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-- right-or-overlap (x only)
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SELECT '' AS two, b1.*
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FROM BOX_TBL b1
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WHERE b1.f1 &> box '(2.0,2.0,2.5,2.5)';
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-- left of
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SELECT '' AS two, b.f1
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FROM BOX_TBL b
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WHERE b.f1 << box '(3.0,3.0,5.0,5.0)';
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-- area <=
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SELECT '' AS four, b.f1
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FROM BOX_TBL b
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WHERE b.f1 <= box '(3.0,3.0,5.0,5.0)';
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-- area <
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SELECT '' AS two, b.f1
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FROM BOX_TBL b
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WHERE b.f1 < box '(3.0,3.0,5.0,5.0)';
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-- area =
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SELECT '' AS two, b.f1
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FROM BOX_TBL b
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WHERE b.f1 = box '(3.0,3.0,5.0,5.0)';
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-- area >
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SELECT '' AS two, b.f1
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FROM BOX_TBL b -- zero area
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WHERE b.f1 > box '(3.5,3.0,4.5,3.0)';
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-- area >=
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SELECT '' AS four, b.f1
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FROM BOX_TBL b -- zero area
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WHERE b.f1 >= box '(3.5,3.0,4.5,3.0)';
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-- right of
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SELECT '' AS two, b.f1
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FROM BOX_TBL b
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WHERE box '(3.0,3.0,5.0,5.0)' >> b.f1;
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-- contained in
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SELECT '' AS three, b.f1
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FROM BOX_TBL b
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WHERE b.f1 <@ box '(0,0,3,3)';
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-- contains
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SELECT '' AS three, b.f1
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FROM BOX_TBL b
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WHERE box '(0,0,3,3)' @> b.f1;
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-- box equality
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SELECT '' AS one, b.f1
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FROM BOX_TBL b
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WHERE box '(1,1,3,3)' ~= b.f1;
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-- center of box, left unary operator
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SELECT '' AS four, @@(b1.f1) AS p
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FROM BOX_TBL b1;
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-- wholly-contained
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SELECT '' AS one, b1.*, b2.*
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FROM BOX_TBL b1, BOX_TBL b2
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WHERE b1.f1 @> b2.f1 and not b1.f1 ~= b2.f1;
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SELECT '' AS four, height(f1), width(f1) FROM BOX_TBL;
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