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| 1 # 2012 February 02 | |
| 2 # | |
| 3 # The author disclaims copyright to this source code. In place of | |
| 4 # a legal notice, here is a blessing: | |
| 5 # | |
| 6 # May you do good and not evil. | |
| 7 # May you find forgiveness for yourself and forgive others. | |
| 8 # May you share freely, never taking more than you give. | |
| 9 # | |
| 10 #*********************************************************************** | |
| 11 # | |
| 12 # Test for queries of the form: | |
| 13 # | |
| 14 # SELECT p, max(q) FROM t1; | |
| 15 # | |
| 16 # Demonstration that the value returned for p is on the same row as | |
| 17 # the maximum q. | |
| 18 # | |
| 19 | |
| 20 set testdir [file dirname $argv0] | |
| 21 source $testdir/tester.tcl | |
| 22 | |
| 23 ifcapable !compound { | |
| 24 finish_test | |
| 25 return | |
| 26 } | |
| 27 | |
| 28 do_test minmax4-1.1 { | |
| 29 db eval { | |
| 30 CREATE TABLE t1(p,q); | |
| 31 SELECT p, max(q) FROM t1; | |
| 32 } | |
| 33 } {{} {}} | |
| 34 do_test minmax4-1.2 { | |
| 35 db eval { | |
| 36 SELECT p, min(q) FROM t1; | |
| 37 } | |
| 38 } {{} {}} | |
| 39 do_test minmax4-1.3 { | |
| 40 db eval { | |
| 41 INSERT INTO t1 VALUES(1,2); | |
| 42 SELECT p, max(q) FROM t1; | |
| 43 } | |
| 44 } {1 2} | |
| 45 do_test minmax4-1.4 { | |
| 46 db eval { | |
| 47 SELECT p, min(q) FROM t1; | |
| 48 } | |
| 49 } {1 2} | |
| 50 do_test minmax4-1.5 { | |
| 51 db eval { | |
| 52 INSERT INTO t1 VALUES(3,4); | |
| 53 SELECT p, max(q) FROM t1; | |
| 54 } | |
| 55 } {3 4} | |
| 56 do_test minmax4-1.6 { | |
| 57 db eval { | |
| 58 SELECT p, min(q) FROM t1; | |
| 59 SELECT p FROM (SELECT p, min(q) FROM t1); | |
| 60 } | |
| 61 } {1 2 1} | |
| 62 do_test minmax4-1.7 { | |
| 63 db eval { | |
| 64 INSERT INTO t1 VALUES(5,0); | |
| 65 SELECT p, max(q) FROM t1; | |
| 66 SELECT p FROM (SELECT max(q), p FROM t1); | |
| 67 } | |
| 68 } {3 4 3} | |
| 69 do_test minmax4-1.8 { | |
| 70 db eval { | |
| 71 SELECT p, min(q) FROM t1; | |
| 72 } | |
| 73 } {5 0} | |
| 74 do_test minmax4-1.9 { | |
| 75 db eval { | |
| 76 INSERT INTO t1 VALUES(6,1); | |
| 77 SELECT p, max(q) FROM t1; | |
| 78 SELECT p FROM (SELECT max(q), p FROM t1); | |
| 79 } | |
| 80 } {3 4 3} | |
| 81 do_test minmax4-1.10 { | |
| 82 db eval { | |
| 83 SELECT p, min(q) FROM t1; | |
| 84 } | |
| 85 } {5 0} | |
| 86 do_test minmax4-1.11 { | |
| 87 db eval { | |
| 88 INSERT INTO t1 VALUES(7,NULL); | |
| 89 SELECT p, max(q) FROM t1; | |
| 90 } | |
| 91 } {3 4} | |
| 92 do_test minmax4-1.12 { | |
| 93 db eval { | |
| 94 SELECT p, min(q) FROM t1; | |
| 95 } | |
| 96 } {5 0} | |
| 97 do_test minmax4-1.13 { | |
| 98 db eval { | |
| 99 DELETE FROM t1 WHERE q IS NOT NULL; | |
| 100 SELECT p, max(q) FROM t1; | |
| 101 } | |
| 102 } {7 {}} | |
| 103 do_test minmax4-1.14 { | |
| 104 db eval { | |
| 105 SELECT p, min(q) FROM t1; | |
| 106 } | |
| 107 } {7 {}} | |
| 108 | |
| 109 do_test minmax4-2.1 { | |
| 110 db eval { | |
| 111 CREATE TABLE t2(a,b,c); | |
| 112 INSERT INTO t2 VALUES | |
| 113 (1,null,2), | |
| 114 (1,2,3), | |
| 115 (1,1,4), | |
| 116 (2,3,5); | |
| 117 SELECT a, max(b), c FROM t2 GROUP BY a ORDER BY a; | |
| 118 } | |
| 119 } {1 2 3 2 3 5} | |
| 120 do_test minmax4-2.2 { | |
| 121 db eval { | |
| 122 SELECT a, min(b), c FROM t2 GROUP BY a ORDER BY a; | |
| 123 } | |
| 124 } {1 1 4 2 3 5} | |
| 125 do_test minmax4-2.3 { | |
| 126 db eval { | |
| 127 SELECT a, min(b), avg(b), count(b), c FROM t2 GROUP BY a ORDER BY a DESC; | |
| 128 } | |
| 129 } {2 3 3.0 1 5 1 1 1.5 2 4} | |
| 130 do_test minmax4-2.4 { | |
| 131 db eval { | |
| 132 SELECT a, min(b), max(b), c FROM t2 GROUP BY a ORDER BY a; | |
| 133 } | |
| 134 } {1 1 2 3 2 3 3 5} | |
| 135 do_test minmax4-2.5 { | |
| 136 db eval { | |
| 137 SELECT a, max(b), min(b), c FROM t2 GROUP BY a ORDER BY a; | |
| 138 } | |
| 139 } {1 2 1 4 2 3 3 5} | |
| 140 do_test minmax4-2.6 { | |
| 141 db eval { | |
| 142 SELECT a, max(b), b, max(c), c FROM t2 GROUP BY a ORDER BY a; | |
| 143 } | |
| 144 } {1 2 1 4 4 2 3 3 5 5} | |
| 145 do_test minmax4-2.7 { | |
| 146 db eval { | |
| 147 SELECT a, min(b), b, min(c), c FROM t2 GROUP BY a ORDER BY a; | |
| 148 } | |
| 149 } {1 1 {} 2 2 2 3 3 5 5} | |
| 150 | |
| 151 | |
| 152 | |
| 153 finish_test | |
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