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sqlite/test/autovacuum.test

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# 2001 September 15
#
# 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 file is testing the SELECT statement.
#
# $Id: autovacuum.test,v 1.29 2009/04/06 17:50:03 danielk1977 Exp $
set testdir [file dirname $argv0]
source $testdir/tester.tcl
# If this build of the library does not support auto-vacuum, omit this
# whole file.
ifcapable {!autovacuum || !pragma} {
finish_test
return
}
# Return a string $len characters long. The returned string is $char repeated
# over and over. For example, [make_str abc 8] returns "abcabcab".
proc make_str {char len} {
set str [string repeat $char. $len]
return [string range $str 0 [expr $len-1]]
}
# Return the number of pages in the file test.db by looking at the file system.
proc file_pages {} {
return [expr [file size test.db] / 1024]
}
#-------------------------------------------------------------------------
# Test cases autovacuum-1.* work as follows:
#
# 1. A table with a single indexed field is created.
# 2. Approximately 20 rows are inserted into the table. Each row is long
# enough such that it uses at least 2 overflow pages for both the table
# and index entry.
# 3. The rows are deleted in a psuedo-random order. Sometimes only one row
# is deleted per transaction, sometimes more than one.
# 4. After each transaction the table data is checked to ensure it is correct
# and a "PRAGMA integrity_check" is executed.
# 5. Once all the rows are deleted the file is checked to make sure it
# consists of exactly 4 pages.
#
# Steps 2-5 are repeated for a few different psuedo-random delete patterns
# (defined by the $delete_orders list).
set delete_orders [list]
lappend delete_orders {1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20}
lappend delete_orders {20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1}
lappend delete_orders {8 18 2 4 14 11 13 3 10 7 9 5 12 17 19 15 20 6 16 1}
lappend delete_orders {10 3 11 17 19 20 7 4 13 6 1 14 16 12 9 18 8 15 5 2}
lappend delete_orders {{1 2 3 4 5 6 7 8 9 10} {11 12 13 14 15 16 17 18 19 20}}
lappend delete_orders {{19 8 17 15} {16 11 9 14} {18 5 3 1} {13 20 7 2} {6 12}}
# The length of each table entry.
# set ENTRY_LEN 3500
set ENTRY_LEN 3500
do_test autovacuum-1.1 {
execsql {
PRAGMA auto_vacuum = 1;
CREATE TABLE av1(a);
CREATE INDEX av1_idx ON av1(a);
}
} {}
set tn 0
foreach delete_order $delete_orders {
incr tn
# Set up the table.
set ::tbl_data [list]
foreach i [lsort -integer [eval concat $delete_order]] {
execsql "INSERT INTO av1 (oid, a) VALUES($i, '[make_str $i $ENTRY_LEN]')"
lappend ::tbl_data [make_str $i $ENTRY_LEN]
}
# Make sure the integrity check passes with the initial data.
ifcapable {integrityck} {
do_test autovacuum-1.$tn.1 {
execsql {
pragma integrity_check
}
} {ok}
}
foreach delete $delete_order {
# Delete one set of rows from the table.
do_test autovacuum-1.$tn.($delete).1 {
execsql "
DELETE FROM av1 WHERE oid = [join $delete " OR oid = "]
"
} {}
# Do the integrity check.
ifcapable {integrityck} {
do_test autovacuum-1.$tn.($delete).2 {
execsql {
pragma integrity_check
}
} {ok}
}
# Ensure the data remaining in the table is what was expected.
foreach d $delete {
set idx [lsearch $::tbl_data [make_str $d $ENTRY_LEN]]
set ::tbl_data [lreplace $::tbl_data $idx $idx]
}
do_test autovacuum-1.$tn.($delete).3 {
execsql {
select a from av1
}
} $::tbl_data
}
# All rows have been deleted. Ensure the file has shrunk to 4 pages.
do_test autovacuum-1.$tn.3 {
file_pages
} {4}
}
#---------------------------------------------------------------------------
# Tests cases autovacuum-2.* test that root pages are allocated
# and deallocated correctly at the start of the file. Operation is roughly as
# follows:
#
# autovacuum-2.1.*: Drop the tables that currently exist in the database.
# autovacuum-2.2.*: Create some tables. Ensure that data pages can be
# moved correctly to make space for new root-pages.
# autovacuum-2.3.*: Drop one of the tables just created (not the last one),
# and check that one of the other tables is moved to
# the free root-page location.
# autovacuum-2.4.*: Check that a table can be created correctly when the
# root-page it requires is on the free-list.
# autovacuum-2.5.*: Check that a table with indices can be dropped. This
# is slightly tricky because dropping one of the
# indices/table btrees could move the root-page of another.
# The code-generation layer of SQLite overcomes this problem
# by dropping the btrees in descending order of root-pages.
# This test ensures that this actually happens.
#
do_test autovacuum-2.1.1 {
execsql {
DROP TABLE av1;
}
} {}
do_test autovacuum-2.1.2 {
file_pages
} {1}
# Create a table and put some data in it.
do_test autovacuum-2.2.1 {
execsql {
CREATE TABLE av1(x);
SELECT rootpage FROM sqlite_master ORDER BY rootpage;
}
} {3}
do_test autovacuum-2.2.2 {
execsql "
INSERT INTO av1 VALUES('[make_str abc 3000]');
INSERT INTO av1 VALUES('[make_str def 3000]');
INSERT INTO av1 VALUES('[make_str ghi 3000]');
INSERT INTO av1 VALUES('[make_str jkl 3000]');
"
set ::av1_data [db eval {select * from av1}]
file_pages
} {15}
# Create another table. Check it is located immediately after the first.
# This test case moves the second page in an over-flow chain.
do_test autovacuum-2.2.3 {
execsql {
CREATE TABLE av2(x);
SELECT rootpage FROM sqlite_master ORDER BY rootpage;
}
} {3 4}
do_test autovacuum-2.2.4 {
file_pages
} {16}
# Create another table. Check it is located immediately after the second.
# This test case moves the first page in an over-flow chain.
do_test autovacuum-2.2.5 {
execsql {
CREATE TABLE av3(x);
SELECT rootpage FROM sqlite_master ORDER BY rootpage;
}
} {3 4 5}
do_test autovacuum-2.2.6 {
file_pages
} {17}
# Create another table. Check it is located immediately after the second.
# This test case moves a btree leaf page.
do_test autovacuum-2.2.7 {
execsql {
CREATE TABLE av4(x);
SELECT rootpage FROM sqlite_master ORDER BY rootpage;
}
} {3 4 5 6}
do_test autovacuum-2.2.8 {
file_pages
} {18}
do_test autovacuum-2.2.9 {
execsql {
select * from av1
}
} $av1_data
do_test autovacuum-2.3.1 {
execsql {
INSERT INTO av2 SELECT 'av1' || x FROM av1;
INSERT INTO av3 SELECT 'av2' || x FROM av1;
INSERT INTO av4 SELECT 'av3' || x FROM av1;
}
set ::av2_data [execsql {select x from av2}]
set ::av3_data [execsql {select x from av3}]
set ::av4_data [execsql {select x from av4}]
file_pages
} {54}
do_test autovacuum-2.3.2 {
execsql {
DROP TABLE av2;
SELECT rootpage FROM sqlite_master ORDER BY rootpage;
}
} {3 4 5}
do_test autovacuum-2.3.3 {
file_pages
} {41}
do_test autovacuum-2.3.4 {
execsql {
SELECT x FROM av3;
}
} $::av3_data
do_test autovacuum-2.3.5 {
execsql {
SELECT x FROM av4;
}
} $::av4_data
# Drop all the tables in the file. This puts all pages except the first 2
# (the sqlite_master root-page and the first pointer map page) on the
# free-list.
do_test autovacuum-2.4.1 {
execsql {
DROP TABLE av1;
DROP TABLE av3;
BEGIN;
DROP TABLE av4;
}
file_pages
} {15}
do_test autovacuum-2.4.2 {
for {set i 3} {$i<=10} {incr i} {
execsql "CREATE TABLE av$i (x)"
}
file_pages
} {15}
do_test autovacuum-2.4.3 {
execsql {
SELECT rootpage FROM sqlite_master ORDER by rootpage
}
} {3 4 5 6 7 8 9 10}
# Right now there are 5 free pages in the database. Consume and then free
# a 520 pages. Then create 520 tables. This ensures that at least some of the
# desired root-pages reside on the second free-list trunk page, and that the
# trunk itself is required at some point.
do_test autovacuum-2.4.4 {
execsql "
INSERT INTO av3 VALUES ('[make_str abcde [expr 1020*520 + 500]]');
DELETE FROM av3;
"
} {}
set root_page_list [list]
set pending_byte_page [expr ($::sqlite_pending_byte / 1024) + 1]
for {set i 3} {$i<=532} {incr i} {
# 207 and 412 are pointer-map pages.
if { $i!=207 && $i!=412 && $i != $pending_byte_page} {
lappend root_page_list $i
}
}
if {$i >= $pending_byte_page} {
lappend root_page_list $i
}
do_test autovacuum-2.4.5 {
for {set i 11} {$i<=530} {incr i} {
execsql "CREATE TABLE av$i (x)"
}
execsql {
SELECT rootpage FROM sqlite_master ORDER by rootpage
}
} $root_page_list
# Just for fun, delete all those tables and see if the database is 1 page.
do_test autovacuum-2.4.6 {
execsql COMMIT;
file_pages
} [expr 561 + (($i >= $pending_byte_page)?1:0)]
integrity_check autovacuum-2.4.6
do_test autovacuum-2.4.7 {
execsql BEGIN
for {set i 3} {$i<=530} {incr i} {
execsql "DROP TABLE av$i"
}
execsql COMMIT
file_pages
} 1
# Create some tables with indices to drop.
do_test autovacuum-2.5.1 {
execsql {
CREATE TABLE av1(a PRIMARY KEY, b, c);
INSERT INTO av1 VALUES('av1 a', 'av1 b', 'av1 c');
CREATE TABLE av2(a PRIMARY KEY, b, c);
CREATE INDEX av2_i1 ON av2(b);
CREATE INDEX av2_i2 ON av2(c);
INSERT INTO av2 VALUES('av2 a', 'av2 b', 'av2 c');
CREATE TABLE av3(a PRIMARY KEY, b, c);
CREATE INDEX av3_i1 ON av3(b);
INSERT INTO av3 VALUES('av3 a', 'av3 b', 'av3 c');
CREATE TABLE av4(a, b, c);
CREATE INDEX av4_i1 ON av4(a);
CREATE INDEX av4_i2 ON av4(b);
CREATE INDEX av4_i3 ON av4(c);
CREATE INDEX av4_i4 ON av4(a, b, c);
INSERT INTO av4 VALUES('av4 a', 'av4 b', 'av4 c');
}
} {}
do_test autovacuum-2.5.2 {
execsql {
SELECT name, rootpage FROM sqlite_master;
}
} [list av1 3 sqlite_autoindex_av1_1 4 \
av2 5 sqlite_autoindex_av2_1 6 av2_i1 7 av2_i2 8 \
av3 9 sqlite_autoindex_av3_1 10 av3_i1 11 \
av4 12 av4_i1 13 av4_i2 14 av4_i3 15 av4_i4 16 \
]
# The following 4 tests are SELECT queries that use the indices created.
# If the root-pages in the internal schema are not updated correctly when
# a table or indice is moved, these queries will fail. They are repeated
# after each table is dropped (i.e. as test cases 2.5.*.[1..4]).
do_test autovacuum-2.5.2.1 {
execsql {
SELECT * FROM av1 WHERE a = 'av1 a';
}
} {{av1 a} {av1 b} {av1 c}}
do_test autovacuum-2.5.2.2 {
execsql {
SELECT * FROM av2 WHERE a = 'av2 a' AND b = 'av2 b' AND c = 'av2 c'
}
} {{av2 a} {av2 b} {av2 c}}
do_test autovacuum-2.5.2.3 {
execsql {
SELECT * FROM av3 WHERE a = 'av3 a' AND b = 'av3 b';
}
} {{av3 a} {av3 b} {av3 c}}
do_test autovacuum-2.5.2.4 {
execsql {
SELECT * FROM av4 WHERE a = 'av4 a' AND b = 'av4 b' AND c = 'av4 c';
}
} {{av4 a} {av4 b} {av4 c}}
# Drop table av3. Indices av4_i2, av4_i3 and av4_i4 are moved to fill the two
# root pages vacated. The operation proceeds as:
# Step 1: Delete av3_i1 (root-page 11). Move root-page of av4_i4 to page 11.
# Step 2: Delete av3 (root-page 10). Move root-page of av4_i3 to page 10.
# Step 3: Delete sqlite_autoindex_av1_3 (root-page 9). Move av4_i2 to page 9.
do_test autovacuum-2.5.3 {
execsql {
DROP TABLE av3;
SELECT name, rootpage FROM sqlite_master;
}
} [list av1 3 sqlite_autoindex_av1_1 4 \
av2 5 sqlite_autoindex_av2_1 6 av2_i1 7 av2_i2 8 \
av4 12 av4_i1 13 av4_i2 9 av4_i3 10 av4_i4 11 \
]
do_test autovacuum-2.5.3.1 {
execsql {
SELECT * FROM av1 WHERE a = 'av1 a';
}
} {{av1 a} {av1 b} {av1 c}}
do_test autovacuum-2.5.3.2 {
execsql {
SELECT * FROM av2 WHERE a = 'av2 a' AND b = 'av2 b' AND c = 'av2 c'
}
} {{av2 a} {av2 b} {av2 c}}
do_test autovacuum-2.5.3.3 {
execsql {
SELECT * FROM av4 WHERE a = 'av4 a' AND b = 'av4 b' AND c = 'av4 c';
}
} {{av4 a} {av4 b} {av4 c}}
# Drop table av1:
# Step 1: Delete av1 (root page 4). Root-page of av4_i1 fills the gap.
# Step 2: Delete sqlite_autoindex_av1_1 (root page 3). Move av4 to the gap.
do_test autovacuum-2.5.4 {
execsql {
DROP TABLE av1;
SELECT name, rootpage FROM sqlite_master;
}
} [list av2 5 sqlite_autoindex_av2_1 6 av2_i1 7 av2_i2 8 \
av4 3 av4_i1 4 av4_i2 9 av4_i3 10 av4_i4 11 \
]
do_test autovacuum-2.5.4.2 {
execsql {
SELECT * FROM av2 WHERE a = 'av2 a' AND b = 'av2 b' AND c = 'av2 c'
}
} {{av2 a} {av2 b} {av2 c}}
do_test autovacuum-2.5.4.4 {
execsql {
SELECT * FROM av4 WHERE a = 'av4 a' AND b = 'av4 b' AND c = 'av4 c';
}
} {{av4 a} {av4 b} {av4 c}}
# Drop table av4:
# Step 1: Delete av4_i4.
# Step 2: Delete av4_i3.
# Step 3: Delete av4_i2.
# Step 4: Delete av4_i1. av2_i2 replaces it.
# Step 5: Delete av4. av2_i1 replaces it.
do_test autovacuum-2.5.5 {
execsql {
DROP TABLE av4;
SELECT name, rootpage FROM sqlite_master;
}
} [list av2 5 sqlite_autoindex_av2_1 6 av2_i1 3 av2_i2 4]
do_test autovacuum-2.5.5.2 {
execsql {
SELECT * FROM av2 WHERE a = 'av2 a' AND b = 'av2 b' AND c = 'av2 c'
}
} {{av2 a} {av2 b} {av2 c}}
#--------------------------------------------------------------------------
# Test cases autovacuum-3.* test the operation of the "PRAGMA auto_vacuum"
# command.
#
do_test autovacuum-3.1 {
execsql {
PRAGMA auto_vacuum;
}
} {1}
do_test autovacuum-3.2 {
db close
sqlite3 db test.db
execsql {
PRAGMA auto_vacuum;
}
} {1}
do_test autovacuum-3.3 {
execsql {
PRAGMA auto_vacuum = 0;
PRAGMA auto_vacuum;
}
} {1}
do_test autovacuum-3.4 {
db close
forcedelete test.db
sqlite3 db test.db
execsql {
PRAGMA auto_vacuum;
}
} $AUTOVACUUM
do_test autovacuum-3.5 {
execsql {
CREATE TABLE av1(x);
PRAGMA auto_vacuum;
}
} $AUTOVACUUM
do_test autovacuum-3.6 {
execsql {
PRAGMA auto_vacuum = 1;
PRAGMA auto_vacuum;
}
} [expr $AUTOVACUUM ? 1 : 0]
do_test autovacuum-3.7 {
execsql {
DROP TABLE av1;
}
file_pages
} [expr $AUTOVACUUM?1:2]
#-----------------------------------------------------------------------
# Test that if a statement transaction around a CREATE INDEX statement is
# rolled back no corruption occurs.
#
do_test autovacuum-4.0 {
# The last round of tests may have left the db in non-autovacuum mode.
# Reset everything just in case.
#
db close
forcedelete test.db test.db-journal
sqlite3 db test.db
execsql {
PRAGMA auto_vacuum = 1;
PRAGMA auto_vacuum;
}
} {1}
do_test autovacuum-4.1 {
execsql {
CREATE TABLE av1(a, b);
BEGIN;
}
for {set i 0} {$i<100} {incr i} {
execsql "INSERT INTO av1 VALUES($i, '[string repeat X 200]');"
}
execsql "INSERT INTO av1 VALUES(99, '[string repeat X 200]');"
execsql {
SELECT sum(a) FROM av1;
}
} {5049}
do_test autovacuum-4.2 {
catchsql {
CREATE UNIQUE INDEX av1_i ON av1(a);
}
} {1 {indexed columns are not unique}}
do_test autovacuum-4.3 {
execsql {
SELECT sum(a) FROM av1;
}
} {5049}
do_test autovacuum-4.4 {
execsql {
COMMIT;
}
} {}
ifcapable integrityck {
# Ticket #1727
do_test autovacuum-5.1 {
db close
sqlite3 db :memory:
db eval {
PRAGMA auto_vacuum=1;
CREATE TABLE t1(a);
CREATE TABLE t2(a);
DROP TABLE t1;
PRAGMA integrity_check;
}
} ok
}
# Ticket #1728.
#
# In autovacuum mode, when tables or indices are deleted, the rootpage
# values in the symbol table have to be updated. There was a bug in this
# logic so that if an index/table was moved twice, the second move might
# not occur. This would leave the internal symbol table in an inconsistent
# state causing subsequent statements to fail.
#
# The problem is difficult to reproduce. The sequence of statements in
# the following test are carefully designed make it occur and thus to
# verify that this very obscure bug has been resolved.
#
ifcapable integrityck&&memorydb {
do_test autovacuum-6.1 {
db close
sqlite3 db :memory:
db eval {
PRAGMA auto_vacuum=1;
CREATE TABLE t1(a, b);
CREATE INDEX i1 ON t1(a);
CREATE TABLE t2(a);
CREATE INDEX i2 ON t2(a);
CREATE TABLE t3(a);
CREATE INDEX i3 ON t2(a);
CREATE INDEX x ON t1(b);
DROP TABLE t3;
PRAGMA integrity_check;
DROP TABLE t2;
PRAGMA integrity_check;
DROP TABLE t1;
PRAGMA integrity_check;
}
} {ok ok ok}
}
#---------------------------------------------------------------------
# Test cases autovacuum-7.X test the case where a page must be moved
# and the destination location collides with at least one other
# entry in the page hash-table (internal to the pager.c module.
#
do_test autovacuum-7.1 {
db close
forcedelete test.db
forcedelete test.db-journal
sqlite3 db test.db
execsql {
PRAGMA auto_vacuum=1;
CREATE TABLE t1(a, b, PRIMARY KEY(a, b));
INSERT INTO t1 VALUES(randstr(400,400),randstr(400,400));
INSERT INTO t1 SELECT randstr(400,400), randstr(400,400) FROM t1; -- 2
INSERT INTO t1 SELECT randstr(400,400), randstr(400,400) FROM t1; -- 4
INSERT INTO t1 SELECT randstr(400,400), randstr(400,400) FROM t1; -- 8
INSERT INTO t1 SELECT randstr(400,400), randstr(400,400) FROM t1; -- 16
INSERT INTO t1 SELECT randstr(400,400), randstr(400,400) FROM t1; -- 32
}
expr {[file size test.db] / 1024}
} {73}
do_test autovacuum-7.2 {
execsql {
CREATE TABLE t2(a, b, PRIMARY KEY(a, b));
INSERT INTO t2 SELECT randstr(400,400), randstr(400,400) FROM t1; -- 2
CREATE TABLE t3(a, b, PRIMARY KEY(a, b));
INSERT INTO t3 SELECT randstr(400,400), randstr(400,400) FROM t1; -- 2
CREATE TABLE t4(a, b, PRIMARY KEY(a, b));
INSERT INTO t4 SELECT randstr(400,400), randstr(400,400) FROM t1; -- 2
CREATE TABLE t5(a, b, PRIMARY KEY(a, b));
INSERT INTO t5 SELECT randstr(400,400), randstr(400,400) FROM t1; -- 2
}
expr {[file size test.db] / 1024}
} {354}
do_test autovacuum-7.3 {
db close
sqlite3 db test.db
execsql {
BEGIN;
DELETE FROM t4;
COMMIT;
SELECT count(*) FROM t1;
}
expr {[file size test.db] / 1024}
} {286}
#------------------------------------------------------------------------
# Additional tests.
#
# Try to determine the autovacuum setting for a database that is locked.
#
do_test autovacuum-8.1 {
db close
sqlite3 db test.db
sqlite3 db2 test.db
db eval {PRAGMA auto_vacuum}
} {1}
if {[permutation] == ""} {
do_test autovacuum-8.2 {
db eval {BEGIN EXCLUSIVE}
catchsql {PRAGMA auto_vacuum} db2
} {1 {database is locked}}
catch {db2 close}
catch {db eval {COMMIT}}
}
do_test autovacuum-9.1 {
execsql {
DROP TABLE t1;
DROP TABLE t2;
DROP TABLE t3;
DROP TABLE t4;
DROP TABLE t5;
PRAGMA page_count;
}
} {1}
do_test autovacuum-9.2 {
file size test.db
} 1024
do_test autovacuum-9.3 {
execsql {
CREATE TABLE t1(a INTEGER PRIMARY KEY, b);
INSERT INTO t1 VALUES(NULL, randstr(50,50));
}
for {set ii 0} {$ii < 10} {incr ii} {
db eval { INSERT INTO t1 SELECT NULL, randstr(50,50) FROM t1 }
}
file size test.db
} $::sqlite_pending_byte
do_test autovacuum-9.4 {
execsql { INSERT INTO t1 SELECT NULL, randstr(50,50) FROM t1 }
} {}
do_test autovacuum-9.5 {
execsql { DELETE FROM t1 WHERE rowid > (SELECT max(a)/2 FROM t1) }
file size test.db
} $::sqlite_pending_byte
finish_test
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