AryaWu/sqlite

1# 2007 October 232#3# The author disclaims copyright to this source code.  In place of4# 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.  The12# focus of this script is measuring executing speed. More specifically,13# the focus is on the speed of:14#15#   * joins16#   * views17#   * sub-selects18#   * triggers19#20# $Id: speed4p.explain,v 1.1 2008/04/16 12:57:48 drh Exp $21#22 23set testdir [file dirname $argv0]24source $testdir/tester.tcl25speed_trial_init speed126 27# Set a uniform random seed28expr srand(0)29 30set sqlout [open speed1.txt w]31proc tracesql {sql} {32  puts $::sqlout $sql\;33}34#db trace tracesql35 36# The number_name procedure below converts its argment (an integer)37# into a string which is the English-language name for that number.38#39# Example:40#41#     puts [number_name 123]   ->  "one hundred twenty three"42#43set ones {zero one two three four five six seven eight nine44          ten eleven twelve thirteen fourteen fifteen sixteen seventeen45          eighteen nineteen}46set tens {{} ten twenty thirty forty fifty sixty seventy eighty ninety}47proc number_name {n} {48  if {$n>=1000} {49    set txt "[number_name [expr {$n/1000}]] thousand"50    set n [expr {$n%1000}]51  } else {52    set txt {}53  }54  if {$n>=100} {55    append txt " [lindex $::ones [expr {$n/100}]] hundred"56    set n [expr {$n%100}]57  }58  if {$n>=20} {59    append txt " [lindex $::tens [expr {$n/10}]]"60    set n [expr {$n%10}]61  }62  if {$n>0} {63    append txt " [lindex $::ones $n]"64  }65  set txt [string trim $txt]66  if {$txt==""} {set txt zero}67  return $txt68}69 70# Summary of tests:71#72#   speed4p-join1: Join three tables using IPK index.73#   speed4p-join2: Join three tables using an index.74#   speed4p-join3: Join two tables without an index.75#76#   speed4p-view1:  Querying a view.77#   speed4p-table1: Same queries as in speed4p-view1, but run directly against78#                  the tables for comparison purposes.79#80#   speed4p-subselect1: A SELECT statement that uses many sub-queries..81#82#   speed4p-trigger1: An INSERT statement that fires a trigger.83#   speed4p-trigger2: An UPDATE statement that fires a trigger.84#   speed4p-trigger3: A DELETE statement that fires a trigger.85#   speed4p-notrigger1: Same operation as trigger1, but without the trigger.86#   speed4p-notrigger2:        "          trigger2           "87#   speed4p-notrigger3:        "          trigger3           "88#89 90# Set up the schema. Each of the tables t1, t2 and t3 contain 50,000 rows.91# This creates a database of around 16MB.92execsql {93  PRAGMA page_size=1024;94  PRAGMA cache_size=8192;95  PRAGMA locking_mode=EXCLUSIVE;96  BEGIN;97  CREATE TABLE t1(rowid INTEGER PRIMARY KEY, i INTEGER, t TEXT);98  CREATE TABLE t2(rowid INTEGER PRIMARY KEY, i INTEGER, t TEXT);99  CREATE TABLE t3(rowid INTEGER PRIMARY KEY, i INTEGER, t TEXT);100 101  CREATE VIEW v1 AS SELECT rowid, i, t FROM t1;102  CREATE VIEW v2 AS SELECT rowid, i, t FROM t2;103  CREATE VIEW v3 AS SELECT rowid, i, t FROM t3;104}105for {set jj 1} {$jj <= 3} {incr jj} {106  set stmt [string map "%T% t$jj" {INSERT INTO %T% VALUES(NULL, $i, $t)}]107  for {set ii 0} {$ii < 50000} {incr ii} {108    set i [expr {int(rand()*50000)}]109    set t [number_name $i]110    execsql $stmt111  }112}113execsql {114  CREATE INDEX i1 ON t1(t);115  CREATE INDEX i2 ON t2(t);116  CREATE INDEX i3 ON t3(t);117  COMMIT;118}119 120# Before running these tests, disable the compiled statement cache built into121# the Tcl interface. This is because we want to test the speed of SQL122# compilation as well as execution.123#124db cache size 0125 126# Join t1, t2, t3 on IPK.127set sql "SELECT * FROM t1, t2, t3 WHERE t1.oid = t2.oid AND t2.oid = t3.oid"128explain $sql129speed_trial speed4p-join1 50000 row $sql130 131# Join t1, t2, t3 on the non-IPK index.132set sql "SELECT * FROM t1, t2, t3 WHERE t1.t = t2.t AND t2.t = t3.t"133explain $sql134speed_trial speed4p-join2 50000 row $sql135 136# Run 10000 simple queries against the views.137set script {138  for {set ii 1} {$ii < 10000} {incr ii} {139    set v [expr {$ii*3}]140    set t [expr {$ii%3+1}]141    db eval "SELECT * FROM v$t WHERE rowid = \$v"142  }143}144explain {SELECT * FROm v1 WHERE rowid=$v}145speed_trial_tcl speed4p-view1 10000 stmt $script146 147# Run the same 10000 simple queries as in the previous test case against148# the underlying tables. The compiled vdbe programs should be identical, so149# the only difference in running time is the extra time taken to compile150# the view definitions.151#152set script {153  for {set ii 1} {$ii < 10000} {incr ii} {154    set v [expr {$ii*3}]155    set t [expr {$ii%3+1}]156    db eval "SELECT t FROM t$t WHERE rowid = \$v"157  }158}159explain {SELECT * FROM t1 WHERE rowid=$v}160speed_trial_tcl speed4p-table1 10000 stmt $script161 162# Run a SELECT that uses sub-queries 10000 times. A total of 30000 sub-selects.163#164set script {165  for {set ii 1} {$ii < 10000} {incr ii} {166    set v [expr {$ii*3}]167    db eval {168      SELECT (SELECT t FROM t1 WHERE rowid = $v), 169             (SELECT t FROM t2 WHERE rowid = $v), 170             (SELECT t FROM t3 WHERE rowid = $v)171    }172  }173}174explain {175      SELECT (SELECT t FROM t1 WHERE rowid = $v), 176             (SELECT t FROM t2 WHERE rowid = $v), 177             (SELECT t FROM t3 WHERE rowid = $v)178}179speed_trial_tcl speed4p-subselect1 10000 stmt $script180 181# The following block tests the speed of some DML statements that cause182# triggers to fire.183#184execsql {185  CREATE TABLE log(op TEXT, r INTEGER, i INTEGER, t TEXT);186  CREATE TABLE t4(rowid INTEGER PRIMARY KEY, i INTEGER, t TEXT);187  CREATE TRIGGER t4_trigger1 AFTER INSERT ON t4 BEGIN188    INSERT INTO log VALUES('INSERT INTO t4', new.rowid, new.i, new.t);189  END;190  CREATE TRIGGER t4_trigger2 AFTER UPDATE ON t4 BEGIN191    INSERT INTO log VALUES('UPDATE OF t4', new.rowid, new.i, new.t);192  END;193  CREATE TRIGGER t4_trigger3 AFTER DELETE ON t4 BEGIN194    INSERT INTO log VALUES('DELETE OF t4', old.rowid, old.i, old.t);195  END;196  BEGIN;197}198set list {}199for {set ii 1} {$ii < 10000} {incr ii} {200  lappend list $ii [number_name $ii]201}202set script {203  foreach {ii name} $::list {204    db eval {INSERT INTO t4 VALUES(NULL, $ii, $name)}205  }206}207explain {INSERT INTO t4 VALUES(NULL, $ii, $name)}208speed_trial_tcl speed4p-trigger1 10000 stmt $script209 210set list {}211for {set ii 1} {$ii < 20000} {incr ii 2} {212  set ii2 [expr {$ii*2}]213  lappend list $ii $ii2 [number_name $ii2]214}215set script {216  foreach {ii ii2 name} $::list {217    db eval {218      UPDATE t4 SET i = $ii2, t = $name WHERE rowid = $ii;219    }220  }221}222explain {UPDATE t4 SET i = $ii2, t = $name WHERE rowid = $ii}223speed_trial_tcl speed4p-trigger2 10000 stmt $script224 225set script {226  for {set ii 1} {$ii < 20000} {incr ii 2} {227    db eval {DELETE FROM t4 WHERE rowid = $ii}228  }229}230explain {DELETE FROM t4 WHERE rowid = $ii}231speed_trial_tcl speed4p-trigger3 10000 stmt $script232execsql {COMMIT}233 234# The following block contains the same tests as the above block that235# tests triggers, with one crucial difference: no triggers are defined.236# So the difference in speed between these tests and the preceding ones237# is the amount of time taken to compile and execute the trigger programs.238#239execsql {240  DROP TABLE t4;241  DROP TABLE log;242  VACUUM;243  CREATE TABLE t4(rowid INTEGER PRIMARY KEY, i INTEGER, t TEXT);244  BEGIN;245}246set list {}247for {set ii 1} {$ii < 10000} {incr ii} {248  lappend list $ii [number_name $ii]249}250set script {251  foreach {ii name} $::list {252    db eval {INSERT INTO t4 VALUES(NULL, $ii, $name);}253  }254}255explain {INSERT INTO t4 VALUES(NULL, $ii, $name)}256speed_trial_tcl speed4p-notrigger1 10000 stmt $script257 258set list {}259for {set ii 1} {$ii < 20000} {incr ii 2} {260  set ii2 [expr {$ii*2}]261  lappend list $ii $ii2 [number_name $ii2]262}263set script {264  foreach {ii ii2 name} $::list {265    db eval {266      UPDATE t4 SET i = $ii2, t = $name WHERE rowid = $ii;267    }268  }269}270explain {UPDATE t4 SET i = $ii2, t = $name WHERE rowid = $ii}271speed_trial_tcl speed4p-notrigger2 10000 stmt $script272 273set script {274  for {set ii 1} {$ii < 20000} {incr ii 2} {275    db eval {DELETE FROM t4 WHERE rowid = $ii}276  }277}278explain {DELETE FROM t4 WHERE rowid = $ii}279speed_trial_tcl speed4p-notrigger3 10000 stmt $script280execsql {COMMIT}281 282speed_trial_summary speed4283finish_test284