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Fix a bug that was emptying shared-schema tables during an ATTACH. (CVS 2867)

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FossilOrigin-Name: 752a2754879becc32da9f9b910f3330f8c7145e4
This commit is contained in:
danielk1977
2006-01-06 06:33:12 +00:00
parent e19d594067
commit de0fe3e4c3
7 changed files with 106 additions and 42 deletions
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56
test/shared.test
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@ -11,7 +11,7 @@
# This file implements regression tests for SQLite library. The
# focus of this file is testing the SELECT statement.
#
# $Id: shared.test,v 1.2 2006/01/05 11:34:34 danielk1977 Exp $
# $Id: shared.test,v 1.3 2006/01/06 06:33:13 danielk1977 Exp $
set testdir [file dirname $argv0]
source $testdir/tester.tcl
@ -32,6 +32,8 @@ set ::enable_shared_cache [sqlite3_enable_shared_cache 1]
# external locking protocol is still working.
# shared-3.*: Simple test of read-uncommitted mode.
#
# shared-4.*: Check that the schema is locked and unlocked correctly.
#
do_test shared-1.1 {
# Open a second database on the file test.db. It should use the same pager
@ -218,6 +220,58 @@ catch {db close}
catch {db2 close}
catch {db3 close}
#--------------------------------------------------------------------------
# Tests shared-4.* test that the schema locking rules are applied
# correctly. i.e.:
#
# 1. All transactions require a read-lock on the schemas of databases they
# access.
# 2. Transactions that modify a database schema require a write-lock on that
# schema.
# 3. It is not possible to compile a statement while another handle has a
# write-lock on the schema.
#
# Open two database handles db and db2. Each has a single attach database
# (as well as main):
#
# db.main -> ./test.db
# db.test2 -> ./test2.db
# db2.main -> ./test2.db
# db2.test -> ./test.db
#
file delete -force test.db
file delete -force test2.db
file delete -force test2.db-journal
sqlite3 db test.db
sqlite3 db2 test2.db
do_test shared-4.1.1 {
set sqlite_open_file_count
} {2}
do_test shared-4.1.2 {
execsql {ATTACH 'test2.db' AS test2}
set sqlite_open_file_count
} {2}
do_test shared-4.1.3 {
execsql {ATTACH 'test.db' AS test} db2
set sqlite_open_file_count
} {2}
do_test shared-4.2.1 {
execsql {
CREATE TABLE abc(a, b, c);
INSERT INTO abc VALUES('i', 'ii', 'iii');
}
} {}
do_test shared-4.2.2 {
execsql {
SELECT * FROM test.abc;
} db2
} {i ii iii}
catch {db2 close}
catch {db close}
finish_test
sqlite3_enable_shared_cache $::enable_shared_cache