1 # 2008 October 9 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 generates SQL text used for performance testing. 12 # 13 # $Id: mkspeedsql.tcl,v 1.1 2008/10/09 17:57:34 drh Exp $ 14 # 15 16 # Set a uniform random seed 17 expr srand(0) 18 19 # The number_name procedure below converts its argment (an integer) 20 # into a string which is the English-language name for that number. 21 # 22 # Example: 23 # 24 # puts [number_name 123] -> "one hundred twenty three" 25 # 26 set ones {zero one two three four five six seven eight nine 27 ten eleven twelve thirteen fourteen fifteen sixteen seventeen 28 eighteen nineteen} 29 set tens {{} ten twenty thirty forty fifty sixty seventy eighty ninety} 30 proc number_name {n} { 31 if {$n>=1000} { 32 set txt "[number_name [expr {$n/1000}]] thousand" 33 set n [expr {$n%1000}] 34 } else { 35 set txt {} 36 } 37 if {$n>=100} { 38 append txt " [lindex $::ones [expr {$n/100}]] hundred" 39 set n [expr {$n%100}] 40 } 41 if {$n>=20} { 42 append txt " [lindex $::tens [expr {$n/10}]]" 43 set n [expr {$n%10}] 44 } 45 if {$n>0} { 46 append txt " [lindex $::ones $n]" 47 } 48 set txt [string trim $txt] 49 if {$txt==""} {set txt zero} 50 return $txt 51 } 52 53 # Create a database schema. 54 # 55 puts { 56 PRAGMA page_size=1024; 57 PRAGMA cache_size=8192; 58 PRAGMA locking_mode=EXCLUSIVE; 59 CREATE TABLE t1(a INTEGER, b INTEGER, c TEXT); 60 CREATE TABLE t2(a INTEGER, b INTEGER, c TEXT); 61 CREATE INDEX i2a ON t2(a); 62 CREATE INDEX i2b ON t2(b); 63 SELECT name FROM sqlite_master ORDER BY 1; 64 } 65 66 67 # 50000 INSERTs on an unindexed table 68 # 69 set t1c_list {} 70 puts {BEGIN;} 71 for {set i 1} {$i<=50000} {incr i} { 72 set r [expr {int(rand()*500000)}] 73 set x [number_name $r] 74 lappend t1c_list $x 75 puts "INSERT INTO t1 VALUES($i,$r,'$x');" 76 } 77 puts {COMMIT;} 78 79 # 50000 INSERTs on an indexed table 80 # 81 puts {BEGIN;} 82 for {set i 1} {$i<=50000} {incr i} { 83 set r [expr {int(rand()*500000)}] 84 puts "INSERT INTO t2 VALUES($i,$r,'[number_name $r]');" 85 } 86 puts {COMMIT;} 87 88 89 # 50 SELECTs on an integer comparison. There is no index so 90 # a full table scan is required. 91 # 92 for {set i 0} {$i<50} {incr i} { 93 set lwr [expr {$i*100}] 94 set upr [expr {($i+10)*100}] 95 puts "SELECT count(*), avg(b) FROM t1 WHERE b>=$lwr AND b<$upr;" 96 } 97 98 # 50 SELECTs on an LIKE comparison. There is no index so a full 99 # table scan is required. 100 # 101 for {set i 0} {$i<50} {incr i} { 102 puts "SELECT count(*), avg(b) FROM t1 WHERE c LIKE '%[number_name $i]%';" 103 } 104 105 # Create indices 106 # 107 puts {BEGIN;} 108 puts { 109 CREATE INDEX i1a ON t1(a); 110 CREATE INDEX i1b ON t1(b); 111 CREATE INDEX i1c ON t1(c); 112 } 113 puts {COMMIT;} 114 115 # 5000 SELECTs on an integer comparison where the integer is 116 # indexed. 117 # 118 set sql {} 119 for {set i 0} {$i<5000} {incr i} { 120 set lwr [expr {$i*100}] 121 set upr [expr {($i+10)*100}] 122 puts "SELECT count(*), avg(b) FROM t1 WHERE b>=$lwr AND b<$upr;" 123 } 124 125 # 100000 random SELECTs against rowid. 126 # 127 for {set i 1} {$i<=100000} {incr i} { 128 set id [expr {int(rand()*50000)+1}] 129 puts "SELECT c FROM t1 WHERE rowid=$id;" 130 } 131 132 # 100000 random SELECTs against a unique indexed column. 133 # 134 for {set i 1} {$i<=100000} {incr i} { 135 set id [expr {int(rand()*50000)+1}] 136 puts "SELECT c FROM t1 WHERE a=$id;" 137 } 138 139 # 50000 random SELECTs against an indexed column text column 140 # 141 set nt1c [llength $t1c_list] 142 for {set i 0} {$i<50000} {incr i} { 143 set r [expr {int(rand()*$nt1c)}] 144 set c [lindex $t1c_list $i] 145 puts "SELECT c FROM t1 WHERE c='$c';" 146 } 147 148 149 # Vacuum 150 puts {VACUUM;} 151 152 # 5000 updates of ranges where the field being compared is indexed. 153 # 154 puts {BEGIN;} 155 for {set i 0} {$i<5000} {incr i} { 156 set lwr [expr {$i*2}] 157 set upr [expr {($i+1)*2}] 158 puts "UPDATE t1 SET b=b*2 WHERE a>=$lwr AND a<$upr;" 159 } 160 puts {COMMIT;} 161 162 # 50000 single-row updates. An index is used to find the row quickly. 163 # 164 puts {BEGIN;} 165 for {set i 0} {$i<50000} {incr i} { 166 set r [expr {int(rand()*500000)}] 167 puts "UPDATE t1 SET b=$r WHERE a=$i;" 168 } 169 puts {COMMIT;} 170 171 # 1 big text update that touches every row in the table. 172 # 173 puts { 174 UPDATE t1 SET c=a; 175 } 176 177 # Many individual text updates. Each row in the table is 178 # touched through an index. 179 # 180 puts {BEGIN;} 181 for {set i 1} {$i<=50000} {incr i} { 182 set r [expr {int(rand()*500000)}] 183 puts "UPDATE t1 SET c='[number_name $r]' WHERE a=$i;" 184 } 185 puts {COMMIT;} 186 187 # Delete all content in a table. 188 # 189 puts {DELETE FROM t1;} 190 191 # Copy one table into another 192 # 193 puts {INSERT INTO t1 SELECT * FROM t2;} 194 195 # Delete all content in a table, one row at a time. 196 # 197 puts {DELETE FROM t1 WHERE 1;} 198 199 # Refill the table yet again 200 # 201 puts {INSERT INTO t1 SELECT * FROM t2;} 202 203 # Drop the table and recreate it without its indices. 204 # 205 puts {BEGIN;} 206 puts { 207 DROP TABLE t1; 208 CREATE TABLE t1(a INTEGER, b INTEGER, c TEXT); 209 } 210 puts {COMMIT;} 211 212 # Refill the table yet again. This copy should be faster because 213 # there are no indices to deal with. 214 # 215 puts {INSERT INTO t1 SELECT * FROM t2;} 216 217 # Select 20000 rows from the table at random. 218 # 219 puts { 220 SELECT rowid FROM t1 ORDER BY random() LIMIT 20000; 221 } 222 223 # Delete 20000 random rows from the table. 224 # 225 puts { 226 DELETE FROM t1 WHERE rowid IN 227 (SELECT rowid FROM t1 ORDER BY random() LIMIT 20000); 228 } 229 puts {SELECT count(*) FROM t1;} 230 231 # Delete 20000 more rows at random from the table. 232 # 233 puts { 234 DELETE FROM t1 WHERE rowid IN 235 (SELECT rowid FROM t1 ORDER BY random() LIMIT 20000); 236 } 237 puts {SELECT count(*) FROM t1;} 238
