# 2007 October 23 # # The author disclaims copyright to this source code. In place of # a legal notice, here is a blessing: # # May you do good and not evil. # May you find forgiveness for yourself and forgive others. # May you share freely, never taking more than you give. # #************************************************************************* # This file implements regression tests for SQLite library. The # focus of this script is measuring executing speed. More specifically, # the focus is on the speed of: # # * joins # * views # * sub-selects # * triggers # # $Id: speed4.test,v 1.2 2008/07/12 14:52:20 drh Exp $ # set testdir [file dirname $argv0] source $testdir/tester.tcl speed_trial_init speed1 # Set a uniform random seed expr srand(0) set sqlout [open speed1.txt w] proc tracesql {sql} { puts $::sqlout $sql\; } #db trace tracesql # The number_name procedure below converts its argment (an integer) # into a string which is the English-language name for that number. # # Example: # # puts [number_name 123] -> "one hundred twenty three" # set ones {zero one two three four five six seven eight nine ten eleven twelve thirteen fourteen fifteen sixteen seventeen eighteen nineteen} set tens {{} ten twenty thirty forty fifty sixty seventy eighty ninety} proc number_name {n} { if {$n>=1000} { set txt "[number_name [expr {$n/1000}]] thousand" set n [expr {$n%1000}] } else { set txt {} } if {$n>=100} { append txt " [lindex $::ones [expr {$n/100}]] hundred" set n [expr {$n%100}] } if {$n>=20} { append txt " [lindex $::tens [expr {$n/10}]]" set n [expr {$n%10}] } if {$n>0} { append txt " [lindex $::ones $n]" } set txt [string trim $txt] if {$txt==""} {set txt zero} return $txt } # Summary of tests: # # speed4-join1: Join three tables using IPK index. # speed4-join2: Join three tables using an index. # speed4-join3: Join two tables without an index. # # speed4-view1: Querying a view. # speed4-table1: Same queries as in speed4-view1, but run directly against # the tables for comparison purposes. # # speed4-subselect1: A SELECT statement that uses many sub-queries.. # # speed4-trigger1: An INSERT statement that fires a trigger. # speed4-trigger2: An UPDATE statement that fires a trigger. # speed4-trigger3: A DELETE statement that fires a trigger. # speed4-notrigger1: Same operation as trigger1, but without the trigger. # speed4-notrigger2: " trigger2 " # speed4-notrigger3: " trigger3 " # # Set up the schema. Each of the tables t1, t2 and t3 contain 50,000 rows. # This creates a database of around 16MB. execsql { BEGIN; CREATE TABLE t1(rowid INTEGER PRIMARY KEY, i INTEGER, t TEXT); CREATE TABLE t2(rowid INTEGER PRIMARY KEY, i INTEGER, t TEXT); CREATE TABLE t3(rowid INTEGER PRIMARY KEY, i INTEGER, t TEXT); CREATE VIEW v1 AS SELECT rowid, i, t FROM t1; CREATE VIEW v2 AS SELECT rowid, i, t FROM t2; CREATE VIEW v3 AS SELECT rowid, i, t FROM t3; } for {set jj 1} {$jj <= 3} {incr jj} { set stmt [string map "%T% t$jj" {INSERT INTO %T% VALUES(NULL, $i, $t)}] for {set ii 0} {$ii < 50000} {incr ii} { set i [expr {int(rand()*50000)}] set t [number_name $i] execsql $stmt } } execsql { CREATE INDEX i1 ON t1(t); CREATE INDEX i2 ON t2(t); CREATE INDEX i3 ON t3(t); COMMIT; } # Before running these tests, disable the compiled statement cache built into # the Tcl interface. This is because we want to test the speed of SQL # compilation as well as execution. # db cache size 0 # Join t1, t2, t3 on IPK. set sql "SELECT * FROM t1, t2, t3 WHERE t1.oid = t2.oid AND t2.oid = t3.oid" speed_trial speed4-join1 50000 row $sql # Join t1, t2, t3 on the non-IPK index. set sql "SELECT * FROM t1, t2, t3 WHERE t1.t = t2.t AND t2.t = t3.t" speed_trial speed4-join2 50000 row $sql # Run 10000 simple queries against the views. set sql "" for {set ii 1} {$ii < 10000} {incr ii} { append sql "SELECT * FROM v[expr {($ii%3)+1}] WHERE rowid = [expr {$ii*3}];" } speed_trial speed4-view1 10000 stmt $sql # Run the same 10000 simple queries as in the previous test case against # the underlying tables. The compiled vdbe programs should be identical, so # the only difference in running time is the extra time taken to compile # the view definitions. # set sql "" for {set ii 1} {$ii < 10000} {incr ii} { append sql "SELECT t FROM t[expr {($ii%3)+1}] WHERE rowid = [expr {$ii*3}];" } speed_trial speed4-table1 10000 stmt $sql # Run a SELECT that uses sub-queries 10000 times. A total of 30000 sub-selects. # set sql "" for {set ii 1} {$ii < 10000} {incr ii} { append sql " SELECT (SELECT t FROM t1 WHERE rowid = [expr {$ii*3}]), (SELECT t FROM t2 WHERE rowid = [expr {$ii*3}]), (SELECT t FROM t3 WHERE rowid = [expr {$ii*3}]) ;" } speed_trial speed4-subselect1 10000 stmt $sql # The following block tests the speed of some DML statements that cause # triggers to fire. # execsql { CREATE TABLE log(op TEXT, r INTEGER, i INTEGER, t TEXT); CREATE TABLE t4(rowid INTEGER PRIMARY KEY, i INTEGER, t TEXT); CREATE TRIGGER t4_trigger1 AFTER INSERT ON t4 BEGIN INSERT INTO log VALUES('INSERT INTO t4', new.rowid, new.i, new.t); END; CREATE TRIGGER t4_trigger2 AFTER UPDATE ON t4 BEGIN INSERT INTO log VALUES('UPDATE OF t4', new.rowid, new.i, new.t); END; CREATE TRIGGER t4_trigger3 AFTER DELETE ON t4 BEGIN INSERT INTO log VALUES('DELETE OF t4', old.rowid, old.i, old.t); END; BEGIN; } set sql "" for {set ii 1} {$ii < 10000} {incr ii} { append sql "INSERT INTO t4 VALUES(NULL, $ii, '[number_name $ii]');" } speed_trial speed4-trigger1 10000 stmt $sql set sql "" for {set ii 1} {$ii < 20000} {incr ii 2} { set ii2 [expr {$ii*2}] append sql " UPDATE t4 SET i = $ii2, t = '[number_name $ii2]' WHERE rowid = $ii; " } speed_trial speed4-trigger2 10000 stmt $sql set sql "" for {set ii 1} {$ii < 20000} {incr ii 2} { append sql "DELETE FROM t4 WHERE rowid = $ii;" } speed_trial speed4-trigger3 10000 stmt $sql execsql {COMMIT} # The following block contains the same tests as the above block that # tests triggers, with one crucial difference: no triggers are defined. # So the difference in speed between these tests and the preceding ones # is the amount of time taken to compile and execute the trigger programs. # execsql { DROP TABLE t4; DROP TABLE log; VACUUM; CREATE TABLE t4(rowid INTEGER PRIMARY KEY, i INTEGER, t TEXT); BEGIN; } set sql "" for {set ii 1} {$ii < 10000} {incr ii} { append sql "INSERT INTO t4 VALUES(NULL, $ii, '[number_name $ii]');" } speed_trial speed4-notrigger1 10000 stmt $sql set sql "" for {set ii 1} {$ii < 20000} {incr ii 2} { set ii2 [expr {$ii*2}] append sql " UPDATE t4 SET i = $ii2, t = '[number_name $ii2]' WHERE rowid = $ii; " } speed_trial speed4-notrigger2 10000 stmt $sql set sql "" for {set ii 1} {$ii < 20000} {incr ii 2} { append sql "DELETE FROM t4 WHERE rowid = $ii;" } speed_trial speed4-notrigger3 10000 stmt $sql execsql {COMMIT} speed_trial_summary speed4 finish_test