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office

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# 2007 October 23

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#

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# The author disclaims copyright to this source code. In place of

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# a legal notice, here is a blessing:

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#

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# May you do good and not evil.

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# May you find forgiveness for yourself and forgive others.

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# May you share freely, never taking more than you give.

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#

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#*************************************************************************

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# This file implements regression tests for SQLite library. The

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# focus of this script is measuring executing speed. More specifically,

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# 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 $

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#

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set testdir [file dirname $argv0]

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source $testdir/tester.tcl

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speed_trial_init speed1

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# Set a uniform random seed

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expr srand(0)

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set sqlout [open speed1.txt w]

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proc tracesql {sql} {

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puts $::sqlout $sql\;

}

#db trace tracesql

# The number_name procedure below converts its argment (an integer)

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# into a string which is the English-language name for that number.

#

# Example:

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# puts [number_name 123] -> "one hundred twenty three"

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#

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set ones {zero one two three four five six seven eight nine

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ten eleven twelve thirteen fourteen fifteen sixteen seventeen

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eighteen nineteen}

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set tens {{} ten twenty thirty forty fifty sixty seventy eighty ninety}

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proc number_name {n} {

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if {$n>=1000} {

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set txt "[number_name [expr {$n/1000}]] thousand"

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set n [expr {$n%1000}]

} else {

set txt {}

}

if {$n>=100} {

append txt " [lindex $::ones [expr {$n/100}]] hundred"

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set n [expr {$n%100}]

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}

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if {$n>=20} {

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append txt " [lindex $::tens [expr {$n/10}]]"

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set n [expr {$n%10}]

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}

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if {$n>0} {

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append txt " [lindex $::ones $n]"

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}

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set txt [string trim $txt]

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if {$txt==""} {set txt zero}

return $txt

}

# Summary of tests:

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#

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# speed4-join1: Join three tables using IPK index.

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# speed4-join2: Join three tables using an index.

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# speed4-join3: Join two tables without an index.

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#

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# speed4-view1: Querying a view.

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# speed4-table1: Same queries as in speed4-view1, but run directly against

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# the tables for comparison purposes.

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#

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# speed4-subselect1: A SELECT statement that uses many sub-queries..

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#

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# speed4-trigger1: An INSERT statement that fires a trigger.

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# speed4-trigger2: An UPDATE statement that fires a trigger.

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# speed4-trigger3: A DELETE statement that fires a trigger.

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# speed4-notrigger1: Same operation as trigger1, but without the trigger.

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# speed4-notrigger2: " trigger2 "

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# speed4-notrigger3: " trigger3 "

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#

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# Set up the schema. Each of the tables t1, t2 and t3 contain 50,000 rows.

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# This creates a database of around 16MB.

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execsql {

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BEGIN;

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CREATE TABLE t1(rowid INTEGER PRIMARY KEY, i INTEGER, t TEXT);

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CREATE TABLE t2(rowid INTEGER PRIMARY KEY, i INTEGER, t TEXT);

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CREATE TABLE t3(rowid INTEGER PRIMARY KEY, i INTEGER, t TEXT);

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CREATE VIEW v1 AS SELECT rowid, i, t FROM t1;

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CREATE VIEW v2 AS SELECT rowid, i, t FROM t2;

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CREATE VIEW v3 AS SELECT rowid, i, t FROM t3;

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}

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for {set jj 1} {$jj <= 3} {incr jj} {

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set stmt [string map "%T% t$jj" {INSERT INTO %T% VALUES(NULL, $i, $t)}]

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for {set ii 0} {$ii < 50000} {incr ii} {

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set i [expr {int(rand()*50000)}]

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set t [number_name $i]

execsql $stmt

}

}

execsql {

CREATE INDEX i1 ON t1(t);

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CREATE INDEX i2 ON t2(t);

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CREATE INDEX i3 ON t3(t);

COMMIT;

}

# Before running these tests, disable the compiled statement cache built into

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# the Tcl interface. This is because we want to test the speed of SQL

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# compilation as well as execution.

#

db cache size 0

# Join t1, t2, t3 on IPK.

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set sql "SELECT * FROM t1, t2, t3 WHERE t1.oid = t2.oid AND t2.oid = t3.oid"

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speed_trial speed4-join1 50000 row $sql

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# Join t1, t2, t3 on the non-IPK index.

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set sql "SELECT * FROM t1, t2, t3 WHERE t1.t = t2.t AND t2.t = t3.t"

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speed_trial speed4-join2 50000 row $sql

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# Run 10000 simple queries against the views.

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set sql ""

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for {set ii 1} {$ii < 10000} {incr ii} {

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append sql "SELECT * FROM v[expr {($ii%3)+1}] WHERE rowid = [expr {$ii*3}];"

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}

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speed_trial speed4-view1 10000 stmt $sql

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# Run the same 10000 simple queries as in the previous test case against

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# the underlying tables. The compiled vdbe programs should be identical, so

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# the only difference in running time is the extra time taken to compile

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# the view definitions.

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#

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set sql ""

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for {set ii 1} {$ii < 10000} {incr ii} {

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append sql "SELECT t FROM t[expr {($ii%3)+1}] WHERE rowid = [expr {$ii*3}];"

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}

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speed_trial speed4-table1 10000 stmt $sql

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# Run a SELECT that uses sub-queries 10000 times. A total of 30000 sub-selects.

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#

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set sql ""

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for {set ii 1} {$ii < 10000} {incr ii} {

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append sql "

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SELECT (SELECT t FROM t1 WHERE rowid = [expr {$ii*3}]),

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(SELECT t FROM t2 WHERE rowid = [expr {$ii*3}]),

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(SELECT t FROM t3 WHERE rowid = [expr {$ii*3}])

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;"

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}

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speed_trial speed4-subselect1 10000 stmt $sql

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# The following block tests the speed of some DML statements that cause

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# triggers to fire.

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#

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execsql {

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CREATE TABLE log(op TEXT, r INTEGER, i INTEGER, t TEXT);

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CREATE TABLE t4(rowid INTEGER PRIMARY KEY, i INTEGER, t TEXT);

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CREATE TRIGGER t4_trigger1 AFTER INSERT ON t4 BEGIN

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INSERT INTO log VALUES('INSERT INTO t4', new.rowid, new.i, new.t);

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END;

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CREATE TRIGGER t4_trigger2 AFTER UPDATE ON t4 BEGIN

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INSERT INTO log VALUES('UPDATE OF t4', new.rowid, new.i, new.t);

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END;

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CREATE TRIGGER t4_trigger3 AFTER DELETE ON t4 BEGIN

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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} {

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append sql "INSERT INTO t4 VALUES(NULL, $ii, '[number_name $ii]');"

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}

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speed_trial speed4-trigger1 10000 stmt $sql

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set sql ""

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for {set ii 1} {$ii < 20000} {incr ii 2} {

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set ii2 [expr {$ii*2}]

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append sql "

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UPDATE t4 SET i = $ii2, t = '[number_name $ii2]' WHERE rowid = $ii;

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"

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}

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speed_trial speed4-trigger2 10000 stmt $sql

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set sql ""

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for {set ii 1} {$ii < 20000} {incr ii 2} {

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append sql "DELETE FROM t4 WHERE rowid = $ii;"

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}

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speed_trial speed4-trigger3 10000 stmt $sql

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execsql {COMMIT}

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# The following block contains the same tests as the above block that

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# tests triggers, with one crucial difference: no triggers are defined.

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# So the difference in speed between these tests and the preceding ones

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# 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} {

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append sql "INSERT INTO t4 VALUES(NULL, $ii, '[number_name $ii]');"

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}

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speed_trial speed4-notrigger1 10000 stmt $sql

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set sql ""

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for {set ii 1} {$ii < 20000} {incr ii 2} {

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set ii2 [expr {$ii*2}]

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append sql "

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UPDATE t4 SET i = $ii2, t = '[number_name $ii2]' WHERE rowid = $ii;

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"

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}

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speed_trial speed4-notrigger2 10000 stmt $sql

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set sql ""

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for {set ii 1} {$ii < 20000} {incr ii 2} {

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append sql "DELETE FROM t4 WHERE rowid = $ii;"

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}

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speed_trial speed4-notrigger3 10000 stmt $sql

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execsql {COMMIT}

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speed_trial_summary speed4

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finish_test

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