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| 1 # 2008 January 5 | |
| 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 # $Id: minmax3.test,v 1.5 2008/07/12 14:52:20 drh Exp $ | |
| 12 | |
| 13 set testdir [file dirname $argv0] | |
| 14 source $testdir/tester.tcl | |
| 15 | |
| 16 # Do an SQL statement. Append the search count to the end of the result. | |
| 17 # | |
| 18 proc count sql { | |
| 19 set ::sqlite_search_count 0 | |
| 20 return [concat [execsql $sql] $::sqlite_search_count] | |
| 21 } | |
| 22 | |
| 23 # This procedure sets the value of the file-format in file 'test.db' | |
| 24 # to $newval. Also, the schema cookie is incremented. | |
| 25 # | |
| 26 proc set_file_format {newval} { | |
| 27 hexio_write test.db 44 [hexio_render_int32 $newval] | |
| 28 set schemacookie [hexio_get_int [hexio_read test.db 40 4]] | |
| 29 incr schemacookie | |
| 30 hexio_write test.db 40 [hexio_render_int32 $schemacookie] | |
| 31 return {} | |
| 32 } | |
| 33 | |
| 34 do_test minmax3-1.0 { | |
| 35 execsql { | |
| 36 CREATE TABLE t1(x, y, z); | |
| 37 } | |
| 38 db close | |
| 39 set_file_format 4 | |
| 40 sqlite3 db test.db | |
| 41 execsql { | |
| 42 BEGIN; | |
| 43 INSERT INTO t1 VALUES('1', 'I', 'one'); | |
| 44 INSERT INTO t1 VALUES('2', 'IV', 'four'); | |
| 45 INSERT INTO t1 VALUES('2', NULL, 'three'); | |
| 46 INSERT INTO t1 VALUES('2', 'II', 'two'); | |
| 47 INSERT INTO t1 VALUES('2', 'V', 'five'); | |
| 48 INSERT INTO t1 VALUES('3', 'VI', 'six'); | |
| 49 COMMIT; | |
| 50 } | |
| 51 } {} | |
| 52 do_test minmax3-1.1.1 { | |
| 53 # Linear scan. | |
| 54 count { SELECT max(y) FROM t1 WHERE x = '2'; } | |
| 55 } {V 5} | |
| 56 do_test minmax3-1.1.2 { | |
| 57 # Index optimizes the WHERE x='2' constraint. | |
| 58 execsql { CREATE INDEX i1 ON t1(x) } | |
| 59 count { SELECT max(y) FROM t1 WHERE x = '2'; } | |
| 60 } {V 9} | |
| 61 do_test minmax3-1.1.3 { | |
| 62 # Index optimizes the WHERE x='2' constraint and the MAX(y). | |
| 63 execsql { CREATE INDEX i2 ON t1(x,y) } | |
| 64 count { SELECT max(y) FROM t1 WHERE x = '2'; } | |
| 65 } {V 1} | |
| 66 do_test minmax3-1.1.4 { | |
| 67 # Index optimizes the WHERE x='2' constraint and the MAX(y). | |
| 68 execsql { DROP INDEX i2 ; CREATE INDEX i2 ON t1(x, y DESC) } | |
| 69 count { SELECT max(y) FROM t1 WHERE x = '2'; } | |
| 70 } {V 1} | |
| 71 do_test minmax3-1.1.5 { | |
| 72 count { SELECT max(y) FROM t1 WHERE x = '2' AND y != 'V'; } | |
| 73 } {IV 2} | |
| 74 do_test minmax3-1.1.6 { | |
| 75 count { SELECT max(y) FROM t1 WHERE x = '2' AND y < 'V'; } | |
| 76 } {IV 1} | |
| 77 do_test minmax3-1.1.6 { | |
| 78 count { SELECT max(y) FROM t1 WHERE x = '2' AND z != 'five'; } | |
| 79 } {IV 4} | |
| 80 | |
| 81 do_test minmax3-1.2.1 { | |
| 82 # Linear scan of t1. | |
| 83 execsql { DROP INDEX i1 ; DROP INDEX i2 } | |
| 84 count { SELECT min(y) FROM t1 WHERE x = '2'; } | |
| 85 } {II 5} | |
| 86 do_test minmax3-1.2.2 { | |
| 87 # Index i1 optimizes the WHERE x='2' constraint. | |
| 88 execsql { CREATE INDEX i1 ON t1(x) } | |
| 89 count { SELECT min(y) FROM t1 WHERE x = '2'; } | |
| 90 } {II 9} | |
| 91 do_test minmax3-1.2.3 { | |
| 92 # Index i2 optimizes the WHERE x='2' constraint and the min(y). | |
| 93 execsql { CREATE INDEX i2 ON t1(x,y) } | |
| 94 count { SELECT min(y) FROM t1 WHERE x = '2'; } | |
| 95 } {II 1} | |
| 96 do_test minmax3-1.2.4 { | |
| 97 # Index optimizes the WHERE x='2' constraint and the MAX(y). | |
| 98 execsql { DROP INDEX i2 ; CREATE INDEX i2 ON t1(x, y DESC) } | |
| 99 count { SELECT min(y) FROM t1 WHERE x = '2'; } | |
| 100 } {II 1} | |
| 101 | |
| 102 do_test minmax3-1.3.1 { | |
| 103 # Linear scan | |
| 104 execsql { DROP INDEX i1 ; DROP INDEX i2 } | |
| 105 count { SELECT min(y) FROM t1; } | |
| 106 } {I 5} | |
| 107 do_test minmax3-1.3.2 { | |
| 108 # Index i1 optimizes the min(y) | |
| 109 execsql { CREATE INDEX i1 ON t1(y) } | |
| 110 count { SELECT min(y) FROM t1; } | |
| 111 } {I 1} | |
| 112 do_test minmax3-1.3.3 { | |
| 113 # Index i1 optimizes the min(y) | |
| 114 execsql { DROP INDEX i1 ; CREATE INDEX i1 ON t1(y DESC) } | |
| 115 count { SELECT min(y) FROM t1; } | |
| 116 } {I 1} | |
| 117 | |
| 118 do_test minmax3-1.4.1 { | |
| 119 # Linear scan | |
| 120 execsql { DROP INDEX i1 } | |
| 121 count { SELECT max(y) FROM t1; } | |
| 122 } {VI 5} | |
| 123 do_test minmax3-1.4.2 { | |
| 124 # Index i1 optimizes the max(y) | |
| 125 execsql { CREATE INDEX i1 ON t1(y) } | |
| 126 count { SELECT max(y) FROM t1; } | |
| 127 } {VI 0} | |
| 128 do_test minmax3-1.4.3 { | |
| 129 # Index i1 optimizes the max(y) | |
| 130 execsql { DROP INDEX i1 ; CREATE INDEX i1 ON t1(y DESC) } | |
| 131 execsql { SELECT y from t1} | |
| 132 count { SELECT max(y) FROM t1; } | |
| 133 } {VI 0} | |
| 134 do_test minmax3-1.4.4 { | |
| 135 execsql { DROP INDEX i1 } | |
| 136 } {} | |
| 137 | |
| 138 do_test minmax3-2.1 { | |
| 139 execsql { | |
| 140 CREATE TABLE t2(a, b); | |
| 141 CREATE INDEX i3 ON t2(a, b); | |
| 142 INSERT INTO t2 VALUES(1, NULL); | |
| 143 INSERT INTO t2 VALUES(1, 1); | |
| 144 INSERT INTO t2 VALUES(1, 2); | |
| 145 INSERT INTO t2 VALUES(1, 3); | |
| 146 INSERT INTO t2 VALUES(2, NULL); | |
| 147 INSERT INTO t2 VALUES(2, 1); | |
| 148 INSERT INTO t2 VALUES(2, 2); | |
| 149 INSERT INTO t2 VALUES(2, 3); | |
| 150 INSERT INTO t2 VALUES(3, 1); | |
| 151 INSERT INTO t2 VALUES(3, 2); | |
| 152 INSERT INTO t2 VALUES(3, 3); | |
| 153 } | |
| 154 } {} | |
| 155 do_test minmax3-2.2 { | |
| 156 execsql { SELECT min(b) FROM t2 WHERE a = 1; } | |
| 157 } {1} | |
| 158 do_test minmax3-2.3 { | |
| 159 execsql { SELECT min(b) FROM t2 WHERE a = 1 AND b>1; } | |
| 160 } {2} | |
| 161 do_test minmax3-2.4 { | |
| 162 execsql { SELECT min(b) FROM t2 WHERE a = 1 AND b>-1; } | |
| 163 } {1} | |
| 164 do_test minmax3-2.5 { | |
| 165 execsql { SELECT min(b) FROM t2 WHERE a = 1; } | |
| 166 } {1} | |
| 167 do_test minmax3-2.6 { | |
| 168 execsql { SELECT min(b) FROM t2 WHERE a = 1 AND b<2; } | |
| 169 } {1} | |
| 170 do_test minmax3-2.7 { | |
| 171 execsql { SELECT min(b) FROM t2 WHERE a = 1 AND b<1; } | |
| 172 } {{}} | |
| 173 do_test minmax3-2.8 { | |
| 174 execsql { SELECT min(b) FROM t2 WHERE a = 3 AND b<1; } | |
| 175 } {{}} | |
| 176 | |
| 177 do_test minmax3-2.1 { | |
| 178 execsql { | |
| 179 DROP TABLE t2; | |
| 180 CREATE TABLE t2(a, b); | |
| 181 CREATE INDEX i3 ON t2(a, b DESC); | |
| 182 INSERT INTO t2 VALUES(1, NULL); | |
| 183 INSERT INTO t2 VALUES(1, 1); | |
| 184 INSERT INTO t2 VALUES(1, 2); | |
| 185 INSERT INTO t2 VALUES(1, 3); | |
| 186 INSERT INTO t2 VALUES(2, NULL); | |
| 187 INSERT INTO t2 VALUES(2, 1); | |
| 188 INSERT INTO t2 VALUES(2, 2); | |
| 189 INSERT INTO t2 VALUES(2, 3); | |
| 190 INSERT INTO t2 VALUES(3, 1); | |
| 191 INSERT INTO t2 VALUES(3, 2); | |
| 192 INSERT INTO t2 VALUES(3, 3); | |
| 193 } | |
| 194 } {} | |
| 195 do_test minmax3-2.2 { | |
| 196 execsql { SELECT min(b) FROM t2 WHERE a = 1; } | |
| 197 } {1} | |
| 198 do_test minmax3-2.3 { | |
| 199 execsql { SELECT min(b) FROM t2 WHERE a = 1 AND b>1; } | |
| 200 } {2} | |
| 201 do_test minmax3-2.4 { | |
| 202 execsql { SELECT min(b) FROM t2 WHERE a = 1 AND b>-1; } | |
| 203 } {1} | |
| 204 do_test minmax3-2.5 { | |
| 205 execsql { SELECT min(b) FROM t2 WHERE a = 1; } | |
| 206 } {1} | |
| 207 do_test minmax3-2.6 { | |
| 208 execsql { SELECT min(b) FROM t2 WHERE a = 1 AND b<2; } | |
| 209 } {1} | |
| 210 do_test minmax3-2.7 { | |
| 211 execsql { SELECT min(b) FROM t2 WHERE a = 1 AND b<1; } | |
| 212 } {{}} | |
| 213 do_test minmax3-2.8 { | |
| 214 execsql { SELECT min(b) FROM t2 WHERE a = 3 AND b<1; } | |
| 215 } {{}} | |
| 216 | |
| 217 finish_test | |
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