1# 2005 September 11 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# This file implements regression tests for SQLite library. The 12# focus of this script is the DISTINCT modifier on aggregate functions. 13# 14# $Id: distinctagg.test,v 1.3 2009/02/09 13:19:28 drh Exp $ 15 16 17set testdir [file dirname $argv0] 18source $testdir/tester.tcl 19set testprefix distinctagg 20 21do_test distinctagg-1.1 { 22 execsql { 23 CREATE TABLE t1(a,b,c); 24 INSERT INTO t1 VALUES(1,2,3); 25 INSERT INTO t1 VALUES(1,3,4); 26 INSERT INTO t1 VALUES(1,3,5); 27 SELECT count(distinct a), 28 count(distinct b), 29 count(distinct c), 30 count(all a) FROM t1; 31 } 32} {1 2 3 3} 33do_test distinctagg-1.2 { 34 execsql { 35 SELECT b, count(distinct c) FROM t1 GROUP BY b 36 } 37} {2 1 3 2} 38do_test distinctagg-1.3 { 39 execsql { 40 INSERT INTO t1 SELECT a+1, b+3, c+5 FROM t1; 41 INSERT INTO t1 SELECT a+2, b+6, c+10 FROM t1; 42 INSERT INTO t1 SELECT a+4, b+12, c+20 FROM t1; 43 SELECT count(*), count(distinct a), count(distinct b) FROM t1 44 } 45} {24 8 16} 46do_test distinctagg-1.4 { 47 execsql { 48 SELECT a, count(distinct c) FROM t1 GROUP BY a ORDER BY a 49 } 50} {1 3 2 3 3 3 4 3 5 3 6 3 7 3 8 3} 51 52do_test distinctagg-2.1 { 53 catchsql { 54 SELECT count(distinct) FROM t1; 55 } 56} {1 {DISTINCT aggregates must have exactly one argument}} 57do_test distinctagg-2.2 { 58 catchsql { 59 SELECT group_concat(distinct a,b) FROM t1; 60 } 61} {1 {DISTINCT aggregates must have exactly one argument}} 62 63#-------------------------------------------------------------------------- 64reset_db 65do_execsql_test 3.0 { 66 CREATE TABLE t1(a, b, c); 67 CREATE TABLE t2(d, e, f); 68 69 INSERT INTO t1 VALUES (1, 1, 1); 70 INSERT INTO t1 VALUES (2, 2, 2); 71 INSERT INTO t1 VALUES (3, 3, 3); 72 INSERT INTO t1 VALUES (4, 1, 4); 73 INSERT INTO t1 VALUES (5, 2, 1); 74 INSERT INTO t1 VALUES (5, 3, 2); 75 INSERT INTO t1 VALUES (4, 1, 3); 76 INSERT INTO t1 VALUES (3, 2, 4); 77 INSERT INTO t1 VALUES (2, 3, 1); 78 INSERT INTO t1 VALUES (1, 1, 2); 79 80 INSERT INTO t2 VALUES('a', 'a', 'a'); 81 INSERT INTO t2 VALUES('b', 'b', 'b'); 82 INSERT INTO t2 VALUES('c', 'c', 'c'); 83 84 CREATE INDEX t1a ON t1(a); 85 CREATE INDEX t1bc ON t1(b, c); 86} 87 88foreach {tn use_eph sql res} { 89 1 0 "SELECT count(DISTINCT a) FROM t1" 5 90 2 0 "SELECT count(DISTINCT b) FROM t1" 3 91 3 1 "SELECT count(DISTINCT c) FROM t1" 4 92 4 0 "SELECT count(DISTINCT c) FROM t1 WHERE b=3" 3 93 5 0 "SELECT count(DISTINCT rowid) FROM t1" 10 94 6 0 "SELECT count(DISTINCT a) FROM t1, t2" 5 95 7 0 "SELECT count(DISTINCT a) FROM t2, t1" 5 96 8 1 "SELECT count(DISTINCT a+b) FROM t1, t2, t2, t2" 6 97 9 0 "SELECT count(DISTINCT c) FROM t1 WHERE c=2" 1 98 10 1 "SELECT count(DISTINCT t1.rowid) FROM t1, t2" 10 99} { 100 do_test 3.$tn.1 { 101 set prg [db eval "EXPLAIN $sql"] 102 set idx [lsearch $prg OpenEphemeral] 103 expr {$idx>=0} 104 } $use_eph 105 106 do_execsql_test 3.$tn.2 $sql $res 107} 108 109do_execsql_test 3.10 { 110 SELECT a, count(DISTINCT b) FROM t1 GROUP BY a; 111} { 112 1 1 2 2 3 2 4 1 5 2 113} 114 115#-------------------------------------------------------------------------- 116reset_db 117do_execsql_test 3.0 { 118 CREATE TABLE t1(a, b, c); 119 CREATE INDEX t1a ON t1(a); 120 CREATE INDEX t1bc ON t1(b, c); 121 122 INSERT INTO t1 VALUES(1, 'A', 1); 123 INSERT INTO t1 VALUES(1, 'A', 1); 124 INSERT INTO t1 VALUES(2, 'A', 2); 125 INSERT INTO t1 VALUES(2, 'A', 2); 126 INSERT INTO t1 VALUES(1, 'B', 1); 127 INSERT INTO t1 VALUES(2, 'B', 2); 128 INSERT INTO t1 VALUES(3, 'B', 3); 129 INSERT INTO t1 VALUES(NULL, 'B', NULL); 130 INSERT INTO t1 VALUES(NULL, 'C', NULL); 131 INSERT INTO t1 VALUES('d', 'D', 'd'); 132 133 CREATE TABLE t2(d, e, f); 134 CREATE INDEX t2def ON t2(d, e, f); 135 136 INSERT INTO t2 VALUES(1, 1, 'a'); 137 INSERT INTO t2 VALUES(1, 1, 'a'); 138 INSERT INTO t2 VALUES(1, 2, 'a'); 139 INSERT INTO t2 VALUES(1, 2, 'a'); 140 INSERT INTO t2 VALUES(1, 2, 'b'); 141 INSERT INTO t2 VALUES(1, 3, 'b'); 142 INSERT INTO t2 VALUES(1, 3, 'a'); 143 INSERT INTO t2 VALUES(1, 3, 'b'); 144 INSERT INTO t2 VALUES(2, 3, 'x'); 145 INSERT INTO t2 VALUES(2, 3, 'y'); 146 INSERT INTO t2 VALUES(2, 3, 'z'); 147 148 CREATE TABLE t3(x, y, z); 149 INSERT INTO t3 VALUES(1,1,1); 150 INSERT INTO t3 VALUES(2,2,2); 151} 152 153foreach {tn use_eph sql res} { 154 1 0 "SELECT count(DISTINCT c) FROM t1 GROUP BY b" {2 3 0 1} 155 2 1 "SELECT count(DISTINCT a) FROM t1 GROUP BY b" {2 3 0 1} 156 3 1 "SELECT count(DISTINCT a) FROM t1 GROUP BY b+c" {0 1 1 1 1} 157 158 4 0 "SELECT count(DISTINCT f) FROM t2 GROUP BY d, e" {1 2 2 3} 159 5 1 "SELECT count(DISTINCT f) FROM t2 GROUP BY d" {2 3} 160 6 0 "SELECT count(DISTINCT f) FROM t2 WHERE d IS 1 GROUP BY e" {1 2 2} 161} { 162 do_test 4.$tn.1 { 163 set prg [db eval "EXPLAIN $sql"] 164 set idx [lsearch $prg OpenEphemeral] 165 expr {$idx>=0} 166 } $use_eph 167 168 do_execsql_test 4.$tn.2 $sql $res 169} 170 171 172set t3root [db one {SELECT rootpage FROM sqlite_schema WHERE name='t3'}] 173foreach {tn use_t3 sql res} { 174 1 1 "SELECT count(*) FROM t3" 2 175 2 0 "SELECT count(*) FROM t1" 10 176 2 1 "SELECT count(DISTINCT a) FROM t1, t3" 4 177 3 0 "SELECT count(DISTINCT a) FROM t1 LEFT JOIN t3" 4 178 4 1 "SELECT count(DISTINCT a) FROM t1 LEFT JOIN t3 WHERE t3.x=1" 4 179 5 1 "SELECT count(DISTINCT a) FROM t1 LEFT JOIN t3 WHERE t3.x=0" 0 180 6 0 "SELECT count(DISTINCT a) FROM t1 LEFT JOIN t3 ON (t3.x=0)" 4 181} { 182 do_test 5.$tn.1 { 183 set bUse 0 184 db eval "EXPLAIN $sql" a { 185 if {$a(opcode)=="OpenRead" && $a(p2)==$t3root} {set bUse 1} 186 } 187 set bUse 188 } $use_t3 189 190 do_execsql_test 5.$tn.2 $sql $res 191} 192 193finish_test 194 195