# 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 file delete 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