304 lines
9.8 KiB
Plaintext
304 lines
9.8 KiB
Plaintext
# 2010 September 24
|
|
#
|
|
# 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 tests to verify that the "testable statements" in
|
|
# the lang_vacuum.html document are correct.
|
|
#
|
|
|
|
set testdir [file dirname $argv0]
|
|
source $testdir/tester.tcl
|
|
|
|
sqlite3_test_control_pending_byte 0x1000000
|
|
|
|
proc create_db {{sql ""}} {
|
|
catch { db close }
|
|
forcedelete test.db
|
|
sqlite3 db test.db
|
|
|
|
db transaction {
|
|
execsql { PRAGMA page_size = 1024; }
|
|
execsql $sql
|
|
execsql {
|
|
CREATE TABLE t1(a PRIMARY KEY, b UNIQUE);
|
|
INSERT INTO t1 VALUES(1, randomblob(400));
|
|
INSERT INTO t1 SELECT a+1, randomblob(400) FROM t1;
|
|
INSERT INTO t1 SELECT a+2, randomblob(400) FROM t1;
|
|
INSERT INTO t1 SELECT a+4, randomblob(400) FROM t1;
|
|
INSERT INTO t1 SELECT a+8, randomblob(400) FROM t1;
|
|
INSERT INTO t1 SELECT a+16, randomblob(400) FROM t1;
|
|
INSERT INTO t1 SELECT a+32, randomblob(400) FROM t1;
|
|
INSERT INTO t1 SELECT a+64, randomblob(400) FROM t1;
|
|
|
|
CREATE TABLE t2(a PRIMARY KEY, b UNIQUE);
|
|
INSERT INTO t2 SELECT * FROM t1;
|
|
}
|
|
}
|
|
|
|
return [expr {[file size test.db] / 1024}]
|
|
}
|
|
|
|
# This proc returns the number of contiguous blocks of pages that make up
|
|
# the table or index named by the only argument. For example, if the table
|
|
# occupies database pages 3, 4, 8 and 9, then this command returns 2 (there
|
|
# are 2 fragments - one consisting of pages 3 and 4, the other of fragments
|
|
# 8 and 9).
|
|
#
|
|
proc fragment_count {name} {
|
|
execsql { CREATE VIRTUAL TABLE temp.stat USING dbstat }
|
|
set nFrag 1
|
|
db eval {SELECT pageno FROM stat WHERE name = 't1' ORDER BY pageno} {
|
|
if {[info exists prevpageno] && $prevpageno != $pageno-1} {
|
|
incr nFrag
|
|
}
|
|
set prevpageno $pageno
|
|
}
|
|
execsql { DROP TABLE temp.stat }
|
|
set nFrag
|
|
}
|
|
|
|
|
|
# -- syntax diagram vacuum-stmt
|
|
#
|
|
do_execsql_test e_vacuum-0.1 { VACUUM } {}
|
|
|
|
# EVIDENCE-OF: R-51469-36013 Unless SQLite is running in
|
|
# "auto_vacuum=FULL" mode, when a large amount of data is deleted from
|
|
# the database file it leaves behind empty space, or "free" database
|
|
# pages.
|
|
#
|
|
# EVIDENCE-OF: R-60541-63059 Running VACUUM to rebuild the database
|
|
# reclaims this space and reduces the size of the database file.
|
|
#
|
|
foreach {tn avmode sz} {
|
|
1 none 7
|
|
2 full 8
|
|
3 incremental 8
|
|
} {
|
|
set nPage [create_db "PRAGMA auto_vacuum = $avmode"]
|
|
|
|
do_execsql_test e_vacuum-1.1.$tn.1 {
|
|
DELETE FROM t1;
|
|
DELETE FROM t2;
|
|
} {}
|
|
|
|
if {$avmode == "full"} {
|
|
# This branch tests the "unless ... auto_vacuum=FULL" in the requirement
|
|
# above. If auto_vacuum is set to FULL, then no empty space is left in
|
|
# the database file.
|
|
do_execsql_test e_vacuum-1.1.$tn.2 {PRAGMA freelist_count} 0
|
|
} else {
|
|
set freelist [expr {$nPage - $sz}]
|
|
if {$avmode == "incremental"} {
|
|
# The page size is 1024 bytes. Therefore, assuming the database contains
|
|
# somewhere between 207 and 411 pages (it does), there are 2 pointer-map
|
|
# pages.
|
|
incr freelist -2
|
|
}
|
|
do_execsql_test e_vacuum-1.1.$tn.3 {PRAGMA freelist_count} $freelist
|
|
do_execsql_test e_vacuum-1.1.$tn.4 {VACUUM} {}
|
|
}
|
|
|
|
do_test e_vacuum-1.1.$tn.5 { expr {[file size test.db] / 1024} } $sz
|
|
}
|
|
|
|
# EVIDENCE-OF: R-50943-18433 Frequent inserts, updates, and deletes can
|
|
# cause the database file to become fragmented - where data for a single
|
|
# table or index is scattered around the database file.
|
|
#
|
|
# EVIDENCE-OF: R-05791-54928 Running VACUUM ensures that each table and
|
|
# index is largely stored contiguously within the database file.
|
|
#
|
|
# e_vacuum-1.2.1 - Perform many INSERT, UPDATE and DELETE ops on table t1.
|
|
# e_vacuum-1.2.2 - Verify that t1 and its indexes are now quite fragmented.
|
|
# e_vacuum-1.2.3 - Run VACUUM.
|
|
# e_vacuum-1.2.4 - Verify that t1 and its indexes are now much
|
|
# less fragmented.
|
|
#
|
|
ifcapable vtab&&compound {
|
|
create_db
|
|
register_dbstat_vtab db
|
|
do_execsql_test e_vacuum-1.2.1 {
|
|
DELETE FROM t1 WHERE a%2;
|
|
INSERT INTO t1 SELECT b, a FROM t2 WHERE a%2;
|
|
UPDATE t1 SET b=randomblob(600) WHERE (a%2)==0;
|
|
} {}
|
|
|
|
do_test e_vacuum-1.2.2.1 { expr [fragment_count t1]>100 } 1
|
|
do_test e_vacuum-1.2.2.2 { expr [fragment_count sqlite_autoindex_t1_1]>100 } 1
|
|
do_test e_vacuum-1.2.2.3 { expr [fragment_count sqlite_autoindex_t1_2]>100 } 1
|
|
|
|
do_execsql_test e_vacuum-1.2.3 { VACUUM } {}
|
|
|
|
# In practice, the tables and indexes each end up stored as two fragments -
|
|
# one containing the root page and another containing all other pages.
|
|
#
|
|
do_test e_vacuum-1.2.4.1 { fragment_count t1 } 2
|
|
do_test e_vacuum-1.2.4.2 { fragment_count sqlite_autoindex_t1_1 } 2
|
|
do_test e_vacuum-1.2.4.3 { fragment_count sqlite_autoindex_t1_2 } 2
|
|
}
|
|
|
|
# EVIDENCE-OF: R-20474-44465 Normally, the database page_size and
|
|
# whether or not the database supports auto_vacuum must be configured
|
|
# before the database file is actually created.
|
|
#
|
|
do_test e_vacuum-1.3.1.1 {
|
|
create_db "PRAGMA page_size = 1024 ; PRAGMA auto_vacuum = FULL"
|
|
execsql { PRAGMA page_size ; PRAGMA auto_vacuum }
|
|
} {1024 1}
|
|
do_test e_vacuum-1.3.1.2 {
|
|
execsql { PRAGMA page_size = 2048 }
|
|
execsql { PRAGMA auto_vacuum = NONE }
|
|
execsql { PRAGMA page_size ; PRAGMA auto_vacuum }
|
|
} {1024 1}
|
|
|
|
# EVIDENCE-OF: R-08570-19916 However, when not in write-ahead log mode,
|
|
# the page_size and/or auto_vacuum properties of an existing database
|
|
# may be changed by using the page_size and/or pragma auto_vacuum
|
|
# pragmas and then immediately VACUUMing the database.
|
|
#
|
|
do_test e_vacuum-1.3.2.1 {
|
|
execsql { PRAGMA journal_mode = delete }
|
|
execsql { PRAGMA page_size = 2048 }
|
|
execsql { PRAGMA auto_vacuum = NONE }
|
|
execsql VACUUM
|
|
execsql { PRAGMA page_size ; PRAGMA auto_vacuum }
|
|
} {2048 0}
|
|
|
|
# EVIDENCE-OF: R-48521-51450 When in write-ahead log mode, only the
|
|
# auto_vacuum support property can be changed using VACUUM.
|
|
#
|
|
ifcapable wal {
|
|
do_test e_vacuum-1.3.3.1 {
|
|
execsql { PRAGMA journal_mode = wal }
|
|
execsql { PRAGMA page_size ; PRAGMA auto_vacuum }
|
|
} {2048 0}
|
|
do_test e_vacuum-1.3.3.2 {
|
|
execsql { PRAGMA page_size = 1024 }
|
|
execsql { PRAGMA auto_vacuum = FULL }
|
|
execsql VACUUM
|
|
execsql { PRAGMA page_size ; PRAGMA auto_vacuum }
|
|
} {2048 1}
|
|
}
|
|
|
|
# EVIDENCE-OF: R-38001-03952 VACUUM only works on the main database. It
|
|
# is not possible to VACUUM an attached database file.
|
|
forcedelete test.db2
|
|
create_db { PRAGMA auto_vacuum = NONE }
|
|
do_execsql_test e_vacuum-2.1.1 {
|
|
ATTACH 'test.db2' AS aux;
|
|
PRAGMA aux.page_size = 1024;
|
|
CREATE TABLE aux.t3 AS SELECT * FROM t1;
|
|
DELETE FROM t3;
|
|
} {}
|
|
set original_size [file size test.db2]
|
|
|
|
# Try everything we can think of to get the aux database vacuumed:
|
|
do_execsql_test e_vacuum-2.1.3 { VACUUM } {}
|
|
do_execsql_test e_vacuum-2.1.4 { VACUUM aux } {}
|
|
do_execsql_test e_vacuum-2.1.5 { VACUUM 'test.db2' } {}
|
|
|
|
# Despite our efforts, space in the aux database has not been reclaimed:
|
|
do_test e_vacuum-2.1.6 { expr {[file size test.db2]==$::original_size} } 1
|
|
|
|
# EVIDENCE-OF: R-17495-17419 The VACUUM command may change the ROWIDs of
|
|
# entries in any tables that do not have an explicit INTEGER PRIMARY
|
|
# KEY.
|
|
#
|
|
# Tests e_vacuum-3.1.1 - 3.1.2 demonstrate that rowids can change when
|
|
# a database is VACUUMed. Tests e_vacuum-3.1.3 - 3.1.4 show that adding
|
|
# an INTEGER PRIMARY KEY column to a table stops this from happening.
|
|
#
|
|
do_execsql_test e_vacuum-3.1.1 {
|
|
CREATE TABLE t4(x);
|
|
INSERT INTO t4(x) VALUES('x');
|
|
INSERT INTO t4(x) VALUES('y');
|
|
INSERT INTO t4(x) VALUES('z');
|
|
DELETE FROM t4 WHERE x = 'y';
|
|
SELECT rowid, x FROM t4;
|
|
} {1 x 3 z}
|
|
do_execsql_test e_vacuum-3.1.2 {
|
|
VACUUM;
|
|
SELECT rowid, x FROM t4;
|
|
} {1 x 2 z}
|
|
|
|
do_execsql_test e_vacuum-3.1.3 {
|
|
CREATE TABLE t5(x, y INTEGER PRIMARY KEY);
|
|
INSERT INTO t5(x) VALUES('x');
|
|
INSERT INTO t5(x) VALUES('y');
|
|
INSERT INTO t5(x) VALUES('z');
|
|
DELETE FROM t5 WHERE x = 'y';
|
|
SELECT rowid, x FROM t5;
|
|
} {1 x 3 z}
|
|
do_execsql_test e_vacuum-3.1.4 {
|
|
VACUUM;
|
|
SELECT rowid, x FROM t5;
|
|
} {1 x 3 z}
|
|
|
|
# EVIDENCE-OF: R-49563-33883 A VACUUM will fail if there is an open
|
|
# transaction, or if there are one or more active SQL statements when it
|
|
# is run.
|
|
#
|
|
do_execsql_test e_vacuum-3.2.1.1 { BEGIN } {}
|
|
do_catchsql_test e_vacuum-3.2.1.2 {
|
|
VACUUM
|
|
} {1 {cannot VACUUM from within a transaction}}
|
|
do_execsql_test e_vacuum-3.2.1.3 { COMMIT } {}
|
|
do_execsql_test e_vacuum-3.2.1.4 { VACUUM } {}
|
|
do_execsql_test e_vacuum-3.2.1.5 { SAVEPOINT x } {}
|
|
do_catchsql_test e_vacuum-3.2.1.6 {
|
|
VACUUM
|
|
} {1 {cannot VACUUM from within a transaction}}
|
|
do_execsql_test e_vacuum-3.2.1.7 { COMMIT } {}
|
|
do_execsql_test e_vacuum-3.2.1.8 { VACUUM } {}
|
|
|
|
create_db
|
|
do_test e_vacuum-3.2.2.1 {
|
|
set res ""
|
|
db eval { SELECT a FROM t1 } {
|
|
if {$a == 10} { set res [catchsql VACUUM] }
|
|
}
|
|
set res
|
|
} {1 {cannot VACUUM - SQL statements in progress}}
|
|
|
|
|
|
# EVIDENCE-OF: R-38735-12540 As of SQLite version 3.1, an alternative to
|
|
# using the VACUUM command to reclaim space after data has been deleted
|
|
# is auto-vacuum mode, enabled using the auto_vacuum pragma.
|
|
#
|
|
do_test e_vacuum-3.3.1 {
|
|
create_db { PRAGMA auto_vacuum = FULL }
|
|
execsql { PRAGMA auto_vacuum }
|
|
} {1}
|
|
|
|
# EVIDENCE-OF: R-64844-34873 When auto_vacuum is enabled for a database
|
|
# free pages may be reclaimed after deleting data, causing the file to
|
|
# shrink, without rebuilding the entire database using VACUUM.
|
|
#
|
|
do_test e_vacuum-3.3.2.1 {
|
|
create_db { PRAGMA auto_vacuum = FULL }
|
|
execsql {
|
|
DELETE FROM t1;
|
|
DELETE FROM t2;
|
|
}
|
|
expr {[file size test.db] / 1024}
|
|
} {8}
|
|
do_test e_vacuum-3.3.2.2 {
|
|
create_db { PRAGMA auto_vacuum = INCREMENTAL }
|
|
execsql {
|
|
DELETE FROM t1;
|
|
DELETE FROM t2;
|
|
PRAGMA incremental_vacuum;
|
|
}
|
|
expr {[file size test.db] / 1024}
|
|
} {8}
|
|
|
|
finish_test
|