| OLD | NEW |
| (Empty) |
| 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;} | |
| OLD | NEW |