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# 2009 July 2
# 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.
# $Id: sharedlock.test,v 1.1 2009/07/02 17:21:58 danielk1977 Exp $
set testdir [file dirname $argv0]
source $testdir/tester.tcl
db close
ifcapable !shared_cache {
set ::enable_shared_cache [sqlite3_enable_shared_cache 1]
sqlite3 db test.db
sqlite3 db2 test.db
do_test sharedlock-1.1 {
execsql {
CREATE TABLE t1(a, b);
INSERT INTO t1 VALUES(1, 'one');
INSERT INTO t1 VALUES(2, 'two');
} {}
do_test sharedlock-1.2 {
set res [list]
db eval { SELECT * FROM t1 ORDER BY rowid } {
lappend res $a $b
if {$a == 1} { catch { db eval "INSERT INTO t1 VALUES(3, 'three')" } }
# This should fail. Connection [db] has a read-lock on t1, which should
# prevent connection [db2] from obtaining the write-lock it needs to
# modify t1. At one point there was a bug causing the previous INSERT
# to drop the read-lock belonging to [db].
if {$a == 2} { catch { db2 eval "INSERT INTO t1 VALUES(4, 'four')" } }
set res
} {1 one 2 two 3 three}
db close
db2 close
sqlite3_enable_shared_cache $::enable_shared_cache
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