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# 2009 March 24
#
# 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.
#
#***********************************************************************
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
ifcapable {!pager_pragmas} {
finish_test
return
}
#-------------------------------------------------------------------------
# The tests in this file check that the following two bugs (both now fixed)
# do not reappear.
#
# jrnlmode2-1.*: Demonstrate bug #3745:
#
# In persistent journal mode, if:
#
# * There is a persistent journal in the file-system, AND
# * there exists a connection with a shared lock on the db file,
#
# then a second connection cannot open a read-transaction on the database.
# The reason is because while determining that the persistent-journal is
# not a hot-journal, SQLite currently grabs an exclusive lock on the
# database file. If this fails because another connection has a shared
# lock, then SQLITE_BUSY is returned to the user.
#
# jrnlmode2-2.*: Demonstrate bug #3751:
#
# If a connection is opened in SQLITE_OPEN_READONLY mode, the underlying
# unix file descriptor on the database file is opened in O_RDONLY mode.
#
# When SQLite queries the database file for the schema in order to compile
# the SELECT statement, it sees the empty journal in the file system, it
# attempts to obtain an exclusive lock on the database file (this is a
# bug). The attempt to obtain an exclusive (write) lock on a read-only file
# fails at the OS level. Under unix, fcntl() reports an EBADF - "Bad file
# descriptor" - error.
#
do_test jrnlmode2-1.1 {
execsql {
PRAGMA journal_mode = persist;
CREATE TABLE t1(a, b);
INSERT INTO t1 VALUES(1, 2);
}
} {persist}
do_test jrnlmode2-1.2 {
file exists test.db-journal
} {1}
do_test jrnlmode2-1.3 {
sqlite3 db2 test.db
execsql { SELECT * FROM t1 } db2
} {1 2}
do_test jrnlmode2-1.4 {
execsql {
INSERT INTO t1 VALUES(3, 4);
}
execsql {
BEGIN;
SELECT * FROM t1;
}
execsql { PRAGMA lock_status }
} {main shared temp closed}
do_test jrnlmode2-1.5 {
file exists test.db-journal
} {1}
do_test jrnlmode2-1.6 {
catchsql { SELECT * FROM t1 } db2
} {0 {1 2 3 4}}
do_test jrnlmode2-1.7 {
execsql { COMMIT }
catchsql { SELECT * FROM t1 } db2
} {0 {1 2 3 4}}
do_test jrnlmode2-2.1 {
db2 close
execsql { PRAGMA journal_mode = truncate }
execsql { INSERT INTO t1 VALUES(5, 6) }
} {}
do_test jrnlmode2-2.2 {
file exists test.db-journal
} {1}
do_test jrnlmode2-2.3 {
file size test.db-journal
} {0}
do_test jrnlmode2-2.4 {
sqlite3 db2 test.db -readonly 1
catchsql { SELECT * FROM t1 } db2
} {0 {1 2 3 4 5 6}}
do_test jrnlmode2-2.5 {
db close
delete_file test.db-journal
} {}
do_test jrnlmode2-2.6 {
sqlite3 db2 test.db -readonly 1
catchsql { SELECT * FROM t1 } db2
} {0 {1 2 3 4 5 6}}
catch { db2 close }
finish_test
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