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| 1 # 2009 February 24 | |
| 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 file is testing "SELECT count(*)" statements. | |
| 13 # | |
| 14 # $Id: count.test,v 1.6 2009/06/05 17:09:12 drh Exp $ | |
| 15 | |
| 16 set testdir [file dirname $argv0] | |
| 17 source $testdir/tester.tcl | |
| 18 | |
| 19 # Test plan: | |
| 20 # | |
| 21 # count-0.*: Make sure count(*) works on an empty database. (Ticket #3774) | |
| 22 # | |
| 23 # count-1.*: Test that the OP_Count instruction appears to work on both | |
| 24 # tables and indexes. Test both when they contain 0 entries, | |
| 25 # when all entries are on the root page, and when the b-tree | |
| 26 # forms a structure 2 and 3 levels deep. | |
| 27 # | |
| 28 # count-2.*: Test that | |
| 29 # | |
| 30 # | |
| 31 | |
| 32 do_test count-0.1 { | |
| 33 db eval { | |
| 34 SELECT count(*) FROM sqlite_master; | |
| 35 } | |
| 36 } {0} | |
| 37 | |
| 38 set iTest 0 | |
| 39 foreach zIndex [list { | |
| 40 /* no-op */ | |
| 41 } { | |
| 42 CREATE INDEX i1 ON t1(a); | |
| 43 }] { | |
| 44 incr iTest | |
| 45 do_test count-1.$iTest.1 { | |
| 46 execsql { | |
| 47 DROP TABLE IF EXISTS t1; | |
| 48 CREATE TABLE t1(a, b); | |
| 49 } | |
| 50 execsql $zIndex | |
| 51 execsql { SELECT count(*) FROM t1 } | |
| 52 } {0} | |
| 53 | |
| 54 do_test count-1.$iTest.2 { | |
| 55 execsql { | |
| 56 INSERT INTO t1 VALUES(1, 2); | |
| 57 INSERT INTO t1 VALUES(3, 4); | |
| 58 SELECT count(*) FROM t1; | |
| 59 } | |
| 60 } {2} | |
| 61 | |
| 62 do_test count-1.$iTest.3 { | |
| 63 execsql { | |
| 64 INSERT INTO t1 SELECT * FROM t1; -- 4 | |
| 65 INSERT INTO t1 SELECT * FROM t1; -- 8 | |
| 66 INSERT INTO t1 SELECT * FROM t1; -- 16 | |
| 67 INSERT INTO t1 SELECT * FROM t1; -- 32 | |
| 68 INSERT INTO t1 SELECT * FROM t1; -- 64 | |
| 69 INSERT INTO t1 SELECT * FROM t1; -- 128 | |
| 70 INSERT INTO t1 SELECT * FROM t1; -- 256 | |
| 71 SELECT count(*) FROM t1; | |
| 72 } | |
| 73 } {256} | |
| 74 | |
| 75 do_test count-1.$iTest.4 { | |
| 76 execsql { | |
| 77 INSERT INTO t1 SELECT * FROM t1; -- 512 | |
| 78 INSERT INTO t1 SELECT * FROM t1; -- 1024 | |
| 79 INSERT INTO t1 SELECT * FROM t1; -- 2048 | |
| 80 INSERT INTO t1 SELECT * FROM t1; -- 4096 | |
| 81 SELECT count(*) FROM t1; | |
| 82 } | |
| 83 } {4096} | |
| 84 | |
| 85 do_test count-1.$iTest.5 { | |
| 86 execsql { | |
| 87 BEGIN; | |
| 88 INSERT INTO t1 SELECT * FROM t1; -- 8192 | |
| 89 INSERT INTO t1 SELECT * FROM t1; -- 16384 | |
| 90 INSERT INTO t1 SELECT * FROM t1; -- 32768 | |
| 91 INSERT INTO t1 SELECT * FROM t1; -- 65536 | |
| 92 COMMIT; | |
| 93 SELECT count(*) FROM t1; | |
| 94 } | |
| 95 } {65536} | |
| 96 } | |
| 97 | |
| 98 proc uses_op_count {sql} { | |
| 99 if {[lsearch [execsql "EXPLAIN $sql"] Count]>=0} { | |
| 100 return 1; | |
| 101 } | |
| 102 return 0 | |
| 103 } | |
| 104 | |
| 105 do_test count-2.1 { | |
| 106 execsql { | |
| 107 CREATE TABLE t2(a, b); | |
| 108 } | |
| 109 uses_op_count {SELECT count(*) FROM t2} | |
| 110 } {1} | |
| 111 do_test count-2.2 { | |
| 112 catchsql {SELECT count(DISTINCT *) FROM t2} | |
| 113 } {1 {near "*": syntax error}} | |
| 114 do_test count-2.3 { | |
| 115 uses_op_count {SELECT count(DISTINCT a) FROM t2} | |
| 116 } {0} | |
| 117 do_test count-2.4 { | |
| 118 uses_op_count {SELECT count(a) FROM t2} | |
| 119 } {0} | |
| 120 do_test count-2.5 { | |
| 121 uses_op_count {SELECT count() FROM t2} | |
| 122 } {1} | |
| 123 do_test count-2.6 { | |
| 124 catchsql {SELECT count(DISTINCT) FROM t2} | |
| 125 } {1 {DISTINCT aggregates must have exactly one argument}} | |
| 126 do_test count-2.7 { | |
| 127 uses_op_count {SELECT count(*)+1 FROM t2} | |
| 128 } {0} | |
| 129 do_test count-2.8 { | |
| 130 uses_op_count {SELECT count(*) FROM t2 WHERE a IS NOT NULL} | |
| 131 } {0} | |
| 132 do_test count-2.9 { | |
| 133 catchsql {SELECT count(*) FROM t2 HAVING count(*)>1} | |
| 134 } {1 {a GROUP BY clause is required before HAVING}} | |
| 135 do_test count-2.10 { | |
| 136 uses_op_count {SELECT count(*) FROM (SELECT 1)} | |
| 137 } {0} | |
| 138 do_test count-2.11 { | |
| 139 execsql { CREATE VIEW v1 AS SELECT 1 AS a } | |
| 140 uses_op_count {SELECT count(*) FROM v1} | |
| 141 } {0} | |
| 142 do_test count-2.12 { | |
| 143 uses_op_count {SELECT count(*), max(a) FROM t2} | |
| 144 } {0} | |
| 145 do_test count-2.13 { | |
| 146 uses_op_count {SELECT count(*) FROM t1, t2} | |
| 147 } {0} | |
| 148 | |
| 149 ifcapable vtab { | |
| 150 register_echo_module [sqlite3_connection_pointer db] | |
| 151 do_test count-2.14 { | |
| 152 execsql { CREATE VIRTUAL TABLE techo USING echo(t1); } | |
| 153 uses_op_count {SELECT count(*) FROM techo} | |
| 154 } {0} | |
| 155 } | |
| 156 | |
| 157 do_test count-3.1 { | |
| 158 execsql { | |
| 159 CREATE TABLE t3(a, b); | |
| 160 SELECT a FROM (SELECT count(*) AS a FROM t3) WHERE a==0; | |
| 161 } | |
| 162 } {0} | |
| 163 do_test count-3.2 { | |
| 164 execsql { | |
| 165 SELECT a FROM (SELECT count(*) AS a FROM t3) WHERE a==1; | |
| 166 } | |
| 167 } {} | |
| 168 | |
| 169 do_test count-4.1 { | |
| 170 execsql { | |
| 171 CREATE TABLE t4(a, b); | |
| 172 INSERT INTO t4 VALUES('a', 'b'); | |
| 173 CREATE INDEX t4i1 ON t4(b, a); | |
| 174 SELECT count(*) FROM t4; | |
| 175 } | |
| 176 } {1} | |
| 177 do_test count-4.2 { | |
| 178 execsql { | |
| 179 CREATE INDEX t4i2 ON t4(b); | |
| 180 SELECT count(*) FROM t4; | |
| 181 } | |
| 182 } {1} | |
| 183 do_test count-4.3 { | |
| 184 execsql { | |
| 185 DROP INDEX t4i1; | |
| 186 CREATE INDEX t4i1 ON t4(b, a); | |
| 187 SELECT count(*) FROM t4; | |
| 188 } | |
| 189 } {1} | |
| 190 | |
| 191 | |
| 192 finish_test | |
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