# 2007 May 17
#
# 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 testing that the overflow-page related
# enhancements added after version 3.3.17 speed things up.
#
# $Id: speed3.test,v 1.6 2009/07/09 02:48:24 shane Exp $
#
#---------------------------------------------------------------------
# Test plan:
#
# If auto-vacuum is enabled for the database, the following cases
# should show performance improvement with respect to 3.3.17.
#
# + When deleting rows that span overflow pages. This is faster
# because the overflow pages no longer need to be read before
# they can be moved to the free list (test cases speed3-1.X).
#
# + When reading a column value stored on an overflow page that
# is not the first overflow page for the row. The improvement
# in this case is because the overflow pages between the tree
# page and the overflow page containing the value do not have
# to be read (test cases speed3-2.X).
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
ifcapable !tclvar||!attach {
finish_test
return
}
speed_trial_init speed1
# Set a uniform random seed
expr srand(0)
set ::NROW 1000
# The number_name procedure below converts its argment (an integer)
# into a string which is the English-language name for that number.
#
# Example:
#
# puts [number_name 123] -> "one hundred twenty three"
#
set ones {zero one two three four five six seven eight nine
ten eleven twelve thirteen fourteen fifteen sixteen seventeen
eighteen nineteen}
set tens {{} ten twenty thirty forty fifty sixty seventy eighty ninety}
proc number_name {n} {
if {$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
}
proc populate_t1 {db} {
$db transaction {
for {set ii 0} {$ii < $::NROW} {incr ii} {
set N [number_name $ii]
set repeats [expr {(10000/[string length $N])+1}]
set text [string range [string repeat $N $repeats] 0 10000]
$db eval {INSERT INTO main.t1 VALUES($ii, $text, $ii)}
}
$db eval {INSERT INTO aux.t1 SELECT * FROM main.t1}
}
}
proc io_log {db} {
db_enter db
array set stats1 [btree_pager_stats [btree_from_db db]]
array set stats2 [btree_pager_stats [btree_from_db db 2]]
db_leave db
# puts "1: [array get stats1]"
# puts "2: [array get stats2]"
puts "Incrvacuum: Read $stats1(read), wrote $stats1(write)"
puts "Normal : Read $stats2(read), wrote $stats2(write)"
}
proc speed3_reset_db {} {
db close
sqlite3 db test.db
db eval {
PRAGMA main.cache_size = 200000;
PRAGMA main.auto_vacuum = 'incremental';
ATTACH 'test2.db' AS 'aux';
PRAGMA aux.auto_vacuum = 'none';
}
}
forcedelete test2.db test2.db-journal
speed3_reset_db
# Set up a database in auto-vacuum mode and create a database schema.
#
do_test speed3-0.1 {
execsql {
CREATE TABLE main.t1(a INTEGER, b TEXT, c INTEGER);
}
execsql {
SELECT name FROM sqlite_master ORDER BY 1;
}
} {t1}
do_test speed3-0.2 {
execsql {
CREATE TABLE aux.t1(a INTEGER, b TEXT, c INTEGER);
}
execsql {
SELECT name FROM aux.sqlite_master ORDER BY 1;
}
} {t1}
do_test speed3-0.3 {
populate_t1 db
execsql {
SELECT count(*) FROM main.t1;
SELECT count(*) FROM aux.t1;
}
} "$::NROW $::NROW"
do_test speed3-0.4 {
execsql {
PRAGMA main.auto_vacuum;
PRAGMA aux.auto_vacuum;
}
} {2 0}
# Delete all content in a table, one row at a time.
#
#io_log db
speed3_reset_db
speed_trial speed3-1.incrvacuum $::NROW row {DELETE FROM main.t1 WHERE 1}
speed_trial speed3-1.normal $::NROW row {DELETE FROM aux.t1 WHERE 1}
io_log db
# Select the "C" column (located at the far end of the overflow
# chain) from each table row.
#
#db eval {PRAGMA incremental_vacuum(500000)}
populate_t1 db
speed3_reset_db
speed_trial speed3-2.incrvacuum $::NROW row {SELECT c FROM main.t1}
speed_trial speed3-2.normal $::NROW row {SELECT c FROM aux.t1}
io_log db
finish_test