-- This file and its contents are licensed under the Apache License 2.0.
-- Please see the included NOTICE for copyright information and
-- LICENSE-APACHE for a copy of the license.
-- table 1
CREATE TABLE "hitest1"(key real, val varchar(40));
-- insertions
INSERT INTO "hitest1" VALUES(0, 'hi');
INSERT INTO "hitest1" VALUES(1, 'sup');
INSERT INTO "hitest1" VALUES(2, 'hello');
INSERT INTO "hitest1" VALUES(3, 'yo');
INSERT INTO "hitest1" VALUES(4, 'howdy');
INSERT INTO "hitest1" VALUES(5, 'hola');
INSERT INTO "hitest1" VALUES(6, 'ya');
INSERT INTO "hitest1" VALUES(1, 'sup');
INSERT INTO "hitest1" VALUES(2, 'hello');
INSERT INTO "hitest1" VALUES(1, 'sup');
-- table 2
CREATE TABLE "hitest2"(name varchar(30), score integer, qualify boolean);
-- insertions
INSERT INTO "hitest2" VALUES('Tom', 6, TRUE);
INSERT INTO "hitest2" VALUES('Mary', 4, FALSE);
INSERT INTO "hitest2" VALUES('Jaq', 3, FALSE);
INSERT INTO "hitest2" VALUES('Jane', 10, TRUE);
-- standard 2 bucket
SELECT histogram(key, 0, 9, 2) FROM hitest1;
 histogram 
-----------
 {0,8,2,0}
(1 row)

-- standard multi-bucket
SELECT histogram(key, 0, 9, 5) FROM hitest1;
    histogram    
-----------------
 {0,4,3,2,1,0,0}
(1 row)

-- standard 3 bucket
SELECT val, histogram(key, 0, 7, 3) FROM hitest1 GROUP BY val ORDER BY val;
  val  |  histogram  
-------+-------------
 hello | {0,2,0,0,0}
 hi    | {0,1,0,0,0}
 hola  | {0,0,0,1,0}
 howdy | {0,0,1,0,0}
 sup   | {0,3,0,0,0}
 ya    | {0,0,0,1,0}
 yo    | {0,0,1,0,0}
(7 rows)

-- standard element beneath lb
SELECT histogram(key, 1, 7, 3) FROM hitest1;
  histogram  
-------------
 {1,5,2,2,0}
(1 row)

-- standard element above ub
SELECT histogram(key, 0, 3, 3) FROM hitest1;
  histogram  
-------------
 {0,1,3,2,4}
(1 row)

-- standard element beneath and above lb and ub, respectively
SELECT histogram(key, 1, 3, 2) FROM hitest1;
 histogram 
-----------
 {1,3,2,4}
(1 row)

-- standard 1 bucket
SELECT histogram(key, 1, 3, 1) FROM hitest1;
 histogram 
-----------
 {1,5,4}
(1 row)

-- standard 2 bucket
SELECT qualify, histogram(score, 0, 10, 2) FROM hitest2 GROUP BY qualify;
 qualify | histogram 
---------+-----------
 f       | {0,2,0,0}
 t       | {0,0,1,1}
(2 rows)

-- standard multi-bucket
SELECT qualify, histogram(score, 0, 10, 5) FROM hitest2 GROUP BY qualify
 qualify |    histogram    
---------+-----------------
 f       | {0,0,1,1,0,0,0}
 t       | {0,0,0,0,1,0,1}
(2 rows)