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 17expr 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# 26set ones {zero one two three four five six seven eight nine 27 ten eleven twelve thirteen fourteen fifteen sixteen seventeen 28 eighteen nineteen} 29set tens {{} ten twenty thirty forty fifty sixty seventy eighty ninety} 30proc 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 $txt 51} 52 53# Create a database schema. 54# 55puts { 56 PRAGMA page_size=1024; 57 PRAGMA cache_size=8192; 58 PRAGMA locking_mode=EXCLUSIVE; 59 CREATE TABLE t1(a INTEGER, b INTEGER, c TEXT); 60 CREATE TABLE t2(a INTEGER, b INTEGER, c TEXT); 61 CREATE INDEX i2a ON t2(a); 62 CREATE INDEX i2b ON t2(b); 63 SELECT name FROM sqlite_master ORDER BY 1; 64} 65 66 67# 50000 INSERTs on an unindexed table 68# 69set t1c_list {} 70puts {BEGIN;} 71for {set i 1} {$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} 77puts {COMMIT;} 78 79# 50000 INSERTs on an indexed table 80# 81puts {BEGIN;} 82for {set i 1} {$i<=50000} {incr i} { 83 set r [expr {int(rand()*500000)}] 84 puts "INSERT INTO t2 VALUES($i,$r,'[number_name $r]');" 85} 86puts {COMMIT;} 87 88 89# 50 SELECTs on an integer comparison. There is no index so 90# a full table scan is required. 91# 92for {set i 0} {$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# 101for {set i 0} {$i<50} {incr i} { 102 puts "SELECT count(*), avg(b) FROM t1 WHERE c LIKE '%[number_name $i]%';" 103} 104 105# Create indices 106# 107puts {BEGIN;} 108puts { 109 CREATE INDEX i1a ON t1(a); 110 CREATE INDEX i1b ON t1(b); 111 CREATE INDEX i1c ON t1(c); 112} 113puts {COMMIT;} 114 115# 5000 SELECTs on an integer comparison where the integer is 116# indexed. 117# 118set sql {} 119for {set i 0} {$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# 127for {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# 134for {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# 141set nt1c [llength $t1c_list] 142for {set i 0} {$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 150puts {VACUUM;} 151 152# 5000 updates of ranges where the field being compared is indexed. 153# 154puts {BEGIN;} 155for {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<$upr;" 159} 160puts {COMMIT;} 161 162# 50000 single-row updates. An index is used to find the row quickly. 163# 164puts {BEGIN;} 165for {set i 0} {$i<50000} {incr i} { 166 set r [expr {int(rand()*500000)}] 167 puts "UPDATE t1 SET b=$r WHERE a=$i;" 168} 169puts {COMMIT;} 170 171# 1 big text update that touches every row in the table. 172# 173puts { 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# 180puts {BEGIN;} 181for {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} 185puts {COMMIT;} 186 187# Delete all content in a table. 188# 189puts {DELETE FROM t1;} 190 191# Copy one table into another 192# 193puts {INSERT INTO t1 SELECT * FROM t2;} 194 195# Delete all content in a table, one row at a time. 196# 197puts {DELETE FROM t1 WHERE 1;} 198 199# Refill the table yet again 200# 201puts {INSERT INTO t1 SELECT * FROM t2;} 202 203# Drop the table and recreate it without its indices. 204# 205puts {BEGIN;} 206puts { 207 DROP TABLE t1; 208 CREATE TABLE t1(a INTEGER, b INTEGER, c TEXT); 209} 210puts {COMMIT;} 211 212# Refill the table yet again. This copy should be faster because 213# there are no indices to deal with. 214# 215puts {INSERT INTO t1 SELECT * FROM t2;} 216 217# Select 20000 rows from the table at random. 218# 219puts { 220 SELECT rowid FROM t1 ORDER BY random() LIMIT 20000; 221} 222 223# Delete 20000 random rows from the table. 224# 225puts { 226 DELETE FROM t1 WHERE rowid IN 227 (SELECT rowid FROM t1 ORDER BY random() LIMIT 20000); 228} 229puts {SELECT count(*) FROM t1;} 230 231# Delete 20000 more rows at random from the table. 232# 233puts { 234 DELETE FROM t1 WHERE rowid IN 235 (SELECT rowid FROM t1 ORDER BY random() LIMIT 20000); 236} 237puts {SELECT count(*) FROM t1;} 238