--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/persistentstorage/sqlite3api/TEST/TclScript/autovacuum.test Fri Jan 22 11:06:30 2010 +0200
@@ -0,0 +1,665 @@
+# 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 1.28 2008/09/10 10:57:28 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
+ file delete -force 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 $AUTOVACUUM?1:2]
+
+
+#-----------------------------------------------------------------------
+# Test that if a statement transaction around a CREATE INDEX statement is
+# rolled back no corruption occurs.
+#
+do_test autovacuum-4.0 {
+ # The last round of tests may have left the db in non-autovacuum mode.
+ # Reset everything just in case.
+ #
+ db close
+ file delete -force test.db test.db-journal
+ sqlite3 db test.db
+ execsql {
+ PRAGMA auto_vacuum = 1;
+ PRAGMA auto_vacuum;
+ }
+} {1}
+do_test autovacuum-4.1 {
+ execsql {
+ CREATE TABLE av1(a, b);
+ BEGIN;
+ }
+ for {set i 0} {$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
+ file delete -force test.db
+ file delete -force 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}
+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}}
+
+
+finish_test