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Implement max() and min() aggregates for array types. Patch from Koju

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Iijima, reviewed by Neil Conway. Catalog version number bumped,
regression tests updated.
This commit is contained in:
Neil Conway
2005-02-28 03:45:24 +00:00
parent 517872c566
commit 484f0464ff
8 changed files with 118 additions and 9 deletions
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44
src/test/regress/expected/arrays.out
View File

@@ -483,3 +483,47 @@ select '{
(1 row)
-- all of the above should be accepted
-- tests for array aggregates
CREATE TEMP TABLE arraggtest ( f1 INT[], f2 TEXT[][], f3 FLOAT[]);
INSERT INTO arraggtest (f1, f2, f3) VALUES
('{1,2,3,4}','{{grey,red},{blue,blue}}','{1.6, 0.0}');
INSERT INTO arraggtest (f1, f2, f3) VALUES
('{1,2,3}','{{grey,red},{grey,blue}}','{1.6}');
SELECT max(f1), min(f1), max(f2), min(f2), max(f3), min(f3) FROM arraggtest;
max | min | max | min | max | min
-----------+---------+--------------------------+--------------------------+---------+-------
{1,2,3,4} | {1,2,3} | {{grey,red},{grey,blue}} | {{grey,red},{blue,blue}} | {1.6,0} | {1.6}
(1 row)
INSERT INTO arraggtest (f1, f2, f3) VALUES
('{3,3,2,4,5,6}','{{white,yellow},{pink,orange}}','{2.1,3.3,1.8,1.7,1.6}');
SELECT max(f1), min(f1), max(f2), min(f2), max(f3), min(f3) FROM arraggtest;
max | min | max | min | max | min
---------------+---------+--------------------------------+--------------------------+-----------------------+-------
{3,3,2,4,5,6} | {1,2,3} | {{white,yellow},{pink,orange}} | {{grey,red},{blue,blue}} | {2.1,3.3,1.8,1.7,1.6} | {1.6}
(1 row)
INSERT INTO arraggtest (f1, f2, f3) VALUES
('{2}','{{black,red},{green,orange}}','{1.6,2.2,2.6,0.4}');
SELECT max(f1), min(f1), max(f2), min(f2), max(f3), min(f3) FROM arraggtest;
max | min | max | min | max | min
---------------+---------+--------------------------------+------------------------------+-----------------------+-------
{3,3,2,4,5,6} | {1,2,3} | {{white,yellow},{pink,orange}} | {{black,red},{green,orange}} | {2.1,3.3,1.8,1.7,1.6} | {1.6}
(1 row)
INSERT INTO arraggtest (f1, f2, f3) VALUES
('{4,2,6,7,8,1}','{{red},{black},{purple},{blue},{blue}}',NULL);
SELECT max(f1), min(f1), max(f2), min(f2), max(f3), min(f3) FROM arraggtest;
max | min | max | min | max | min
---------------+---------+--------------------------------+------------------------------+-----------------------+-------
{4,2,6,7,8,1} | {1,2,3} | {{white,yellow},{pink,orange}} | {{black,red},{green,orange}} | {2.1,3.3,1.8,1.7,1.6} | {1.6}
(1 row)
INSERT INTO arraggtest (f1, f2, f3) VALUES
('{}','{{pink,white,blue,red,grey,orange}}','{2.1,1.87,1.4,2.2}');
SELECT max(f1), min(f1), max(f2), min(f2), max(f3), min(f3) FROM arraggtest;
max | min | max | min | max | min
---------------+-----+--------------------------------+------------------------------+-----------------------+-------
{4,2,6,7,8,1} | {} | {{white,yellow},{pink,orange}} | {{black,red},{green,orange}} | {2.1,3.3,1.8,1.7,1.6} | {1.6}
(1 row)

25
src/test/regress/sql/arrays.sql
View File

@@ -217,3 +217,28 @@ select '{
@ 1 hour @ 42 minutes @ 20 seconds
}'::interval[];
-- all of the above should be accepted
-- tests for array aggregates
CREATE TEMP TABLE arraggtest ( f1 INT[], f2 TEXT[][], f3 FLOAT[]);
INSERT INTO arraggtest (f1, f2, f3) VALUES
('{1,2,3,4}','{{grey,red},{blue,blue}}','{1.6, 0.0}');
INSERT INTO arraggtest (f1, f2, f3) VALUES
('{1,2,3}','{{grey,red},{grey,blue}}','{1.6}');
SELECT max(f1), min(f1), max(f2), min(f2), max(f3), min(f3) FROM arraggtest;
INSERT INTO arraggtest (f1, f2, f3) VALUES
('{3,3,2,4,5,6}','{{white,yellow},{pink,orange}}','{2.1,3.3,1.8,1.7,1.6}');
SELECT max(f1), min(f1), max(f2), min(f2), max(f3), min(f3) FROM arraggtest;
INSERT INTO arraggtest (f1, f2, f3) VALUES
('{2}','{{black,red},{green,orange}}','{1.6,2.2,2.6,0.4}');
SELECT max(f1), min(f1), max(f2), min(f2), max(f3), min(f3) FROM arraggtest;
INSERT INTO arraggtest (f1, f2, f3) VALUES
('{4,2,6,7,8,1}','{{red},{black},{purple},{blue},{blue}}',NULL);
SELECT max(f1), min(f1), max(f2), min(f2), max(f3), min(f3) FROM arraggtest;
INSERT INTO arraggtest (f1, f2, f3) VALUES
('{}','{{pink,white,blue,red,grey,orange}}','{2.1,1.87,1.4,2.2}');
SELECT max(f1), min(f1), max(f2), min(f2), max(f3), min(f3) FROM arraggtest;