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# 2010 June 30
#
# 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 sqlite3_unlock_notify() API.
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
# This script only runs if shared-cache and unlock-notify are available.
#
ifcapable !unlock_notify||!shared_cache {
finish_test
return
}
set esc [sqlite3_enable_shared_cache 1]
sqlite3 db test.db
forcedelete test.db2 test.db2-journal test.db2-wal
sqlite3 db2 test.db2
do_test notify3-1.1 {
execsql {
CREATE TABLE t1(a, b);
INSERT INTO t1 VALUES('t1 A', 't1 B');
}
} {}
do_test notify3-1.2 {
execsql {
CREATE TABLE t2(a, b);
INSERT INTO t2 VALUES('t2 A', 't2 B');
} db2
} {}
do_test notify3-1.3 {
execsql {
BEGIN EXCLUSIVE;
INSERT INTO t2 VALUES('t2 C', 't2 D');
} db2
} {}
do_test notify3-1.4 {
catchsql { ATTACH 'test.db2' AS aux }
} {0 {}}
do_test notify3-1.5 {
catchsql { SELECT * FROM t2 }
} {1 {database schema is locked: aux}}
do_test notify3-1.6 {
list [sqlite3_errcode db] [sqlite3_extended_errcode db]
} {SQLITE_LOCKED SQLITE_LOCKED_SHAREDCACHE}
do_test notify3-1.7 {
sqlite3_extended_result_codes db 1
catch { set ::stmt [sqlite3_prepare_v2 db "SELECT * FROM t2" -1 tail] } msg
set msg
} {(262) database schema is locked: aux}
do_test notify3-1.8 {
set ::when 1
db unlock_notify { set ::res $::when }
set ::when 2
execsql { COMMIT } db2
set ::res
} {2}
do_test notify3-1.9 {
catchsql { SELECT * FROM t2 }
} {0 {{t2 A} {t2 B} {t2 C} {t2 D}}}
db close
set err {{1 {unable to open database: test.db2}}}
set noerr {{0 {}}}
# When a new database is attached, the connection doing the attaching
# tries to load any unloaded schemas for both the new database and any
# already attached databases (including the main database). If it is
# unable to load any such schemas, then the ATTACH statement fails.
#
# This block tests that if the loading of schemas as a result of an
# ATTACH fails due to locks on the schema table held by other shared-cache
# connections the extended error code is SQLITE_LOCKED_SHAREDCACHE and
# it is possible to use the unlock-notify mechanism to determine when
# the ATTACH might succeed.
#
# This test does not work for test-permutations that specify SQL to
# be executed as part of the [sqlite3] command that opens the database.
# Executing such SQL causes SQLite to load the database schema into memory
# earlier than expected, causing test cases to fail.
#
if {[presql] == ""} {
foreach {
tn
db1_loaded
db2_loaded
enable_extended_errors
result
error1 error2
} "
0 0 0 0 $err SQLITE_LOCKED SQLITE_LOCKED_SHAREDCACHE
1 0 0 1 $err SQLITE_LOCKED_SHAREDCACHE SQLITE_LOCKED_SHAREDCACHE
2 0 1 0 $err SQLITE_LOCKED SQLITE_LOCKED_SHAREDCACHE
3 0 1 1 $err SQLITE_LOCKED_SHAREDCACHE SQLITE_LOCKED_SHAREDCACHE
4 1 0 0 $err SQLITE_LOCKED SQLITE_LOCKED_SHAREDCACHE
5 1 0 1 $err SQLITE_LOCKED_SHAREDCACHE SQLITE_LOCKED_SHAREDCACHE
6 1 1 0 $noerr SQLITE_OK SQLITE_OK
7 1 1 1 $noerr SQLITE_OK SQLITE_OK
" {
do_test notify3-2.$tn.1 {
catch { db1 close }
catch { db2 close }
sqlite3 db1 test.db
sqlite3 db2 test.db2
sqlite3_extended_result_codes db1 $enable_extended_errors
sqlite3_extended_result_codes db2 $enable_extended_errors
if { $db1_loaded } { db1 eval "SELECT * FROM sqlite_master" }
if { $db2_loaded } { db2 eval "SELECT * FROM sqlite_master" }
db2 eval "BEGIN EXCLUSIVE"
catchsql "ATTACH 'test.db2' AS two" db1
} $result
do_test notify3-2.$tn.2 {
list [sqlite3_errcode db1] [sqlite3_extended_errcode db1]
} [list $error1 $error2]
do_test notify3-2.$tn.3 {
db1 unlock_notify {set invoked 1}
set invoked 0
db2 eval commit
set invoked
} [lindex $result 0]
}
}
catch { db1 close }
catch { db2 close }
sqlite3_enable_shared_cache $esc
finish_test
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