3 # The author disclaims copyright to this source code. In place of
4 # a legal notice, here is a blessing:
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.
10 #***********************************************************************
12 # This file implements tests of the "skip-scan" query strategy. In
13 # particular it tests that stat4 data can be used by a range query
14 # that uses the skip-scan approach.
17 set testdir [file dirname $argv0]
18 source $testdir/tester.tcl
19 set testprefix skipscan5
27 CREATE TABLE t1(a INT, b INT, c INT);
28 CREATE INDEX i1 ON t1(a, b);
33 for {set i 0} {$i < 100} {incr i} {
34 set a [expr int(rand()*4.0) + 1]
35 set b [expr int(rand()*20.0) + 1]
36 execsql { INSERT INTO t1 VALUES($a, $b, NULL) }
42 1 "b = 5" {/*ANY(a) AND b=?*/}
43 2 "b > 12 AND b < 16" {/*ANY(a) AND b>? AND b<?*/}
44 3 "b > 2 AND b < 16" {/*SCAN TABLE t1*/}
45 4 "b > 18 AND b < 25" {/*ANY(a) AND b>? AND b<?*/}
46 5 "b > 15" {/*ANY(a) AND b>?*/}
47 6 "b > 5" {/*SCAN TABLE t1*/}
48 7 "b < 15" {/*SCAN TABLE t1*/}
49 8 "b < 5" {/*ANY(a) AND b<?*/}
50 9 "5 > b" {/*ANY(a) AND b<?*/}
51 10 "b = '5'" {/*ANY(a) AND b=?*/}
52 11 "b > '12' AND b < '16'" {/*ANY(a) AND b>? AND b<?*/}
53 12 "b > '2' AND b < '16'" {/*SCAN TABLE t1*/}
54 13 "b > '18' AND b < '25'" {/*ANY(a) AND b>? AND b<?*/}
55 14 "b > '15'" {/*ANY(a) AND b>?*/}
56 15 "b > '5'" {/*SCAN TABLE t1*/}
57 16 "b < '15'" {/*SCAN TABLE t1*/}
58 17 "b < '5'" {/*ANY(a) AND b<?*/}
59 18 "'5' > b" {/*ANY(a) AND b<?*/}
61 set sql "EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE $q"
62 do_execsql_test 1.3.$tn $sql $res
66 #-------------------------------------------------------------------------
67 # Test that range-query/skip-scan estimation works with text values.
68 # And on UTF-16 databases when there is no UTF-16 collation sequence
72 proc test_collate {enc lhs rhs} {
73 string compare $lhs $rhs
76 foreach {tn dbenc coll} {
77 1 UTF-8 { add_test_collate db 0 0 1 }
78 2 UTF-16 { add_test_collate db 1 0 0 }
79 3 UTF-8 { add_test_collate db 0 1 0 }
84 do_execsql_test 2.$tn.1 " PRAGMA encoding = '$dbenc' "
85 do_execsql_test 2.$tn.2 {
86 CREATE TABLE t2(a TEXT, b TEXT, c TEXT COLLATE test_collate, d TEXT);
87 CREATE INDEX i2 ON t2(a, b, c);
91 set vocab(c) { a b c d e f g h i j k l m n o p q r s t }
92 set vocab(b) { one two three }
96 for {set i 0} {$i < 100} {incr i} {
97 foreach var {a b c d} {
98 set $var [lindex $vocab($var) [expr $i % [llength $vocab($var)]]]
100 execsql { INSERT INTO t2 VALUES($a, $b, $c, $d) }
105 foreach {tn2 q res} {
106 1 { c BETWEEN 'd' AND 'e' } {/*ANY(a) AND ANY(b) AND c>? AND c<?*/}
107 2 { c BETWEEN 'b' AND 'r' } {/*SCAN TABLE t2*/}
108 3 { c > 'q' } {/*ANY(a) AND ANY(b) AND c>?*/}
109 4 { c > 'e' } {/*SCAN TABLE t2*/}
110 5 { c < 'q' } {/*SCAN TABLE t2*/}
111 6 { c < 'c' } {/*ANY(a) AND ANY(b) AND c<?*/}
113 set sql "EXPLAIN QUERY PLAN SELECT * FROM t2 WHERE $q"
114 do_execsql_test 2.$tn.$tn2 $sql $res
119 #-------------------------------------------------------------------------
120 # Test that range-query/skip-scan estimation works on columns that contain
121 # a variety of types.
125 do_execsql_test 3.1 {
126 CREATE TABLE t3(a, b, c);
127 CREATE INDEX i3 ON t3(a, b);
133 -8725 -8659 -8248.340244520614
134 -8208 -7939 -7746.985758536954
136 -5363 -4935.781822975623 -4935.063633571875
137 -3518.4554911770183 -2537 -2026
138 -1511.2603881914456 -1510.4195994839156 -1435
139 -1127.4210136045804 -1045 99
140 1353 1457 1563.2908193223611
142 2745.18831295203 2866.279926554429 3075.0468527316334
143 3447 3867 4237.892420141907
144 4335 5052.9775000424015 5232.178240656935
145 5541.784919585003 5749.725576373621 5758
146 6005 6431 7263.477992854769
147 7441 7541 8667.279760663994
148 8857 9199.638673662972 'dl'
151 'lhwcv' 'mzlb' 'nbjked'
152 'nufpo' 'nxqkdq' 'shelln'
155 X'0a' X'203f6429f1f33f' X'23858e324545e0362b'
156 X'3f9f8a' X'516f7ddd4b' X'68f1df0930ac6b'
157 X'9ea60d' X'a06f' X'aefd342a39ce36df'
158 X'afaa020fe2' X'be201c' X'c47d97b209601e45'
164 execsql "INSERT INTO t3 VALUES($c % 2, $v, $c)"
171 1 "b BETWEEN -10000 AND -8000" {/*ANY(a) AND b>? AND b<?*/}
172 2 "b BETWEEN -10000 AND 'qqq'" {/*SCAN TABLE t3*/}
173 3 "b < X'5555'" {/*SCAN TABLE t3*/}
174 4 "b > X'5555'" {/*ANY(a) AND b>?*/}
175 5 "b > 'zzz'" {/*ANY(a) AND b>?*/}
176 6 "b < 'zzz'" {/*SCAN TABLE t3*/}
178 set sql "EXPLAIN QUERY PLAN SELECT * FROM t3 WHERE $q"
179 do_execsql_test 3.3.$tn $sql $res