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# 2012 May 15
#
# 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.
#
#***********************************************************************
#
# The tests in this file are intended to show that closing one database
# connection to a shared-cache while there exist other connections (a)
# does not cause the schema to be reloaded and (b) does not cause any
# other problems.
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
ifcapable !shared_cache { finish_test ; return }
set testprefix shared8
db close
set ::enable_shared_cache [sqlite3_enable_shared_cache 1]
do_test 0.0 { sqlite3_enable_shared_cache } {1}
proc roman {n} {
array set R {1 i 2 ii 3 iii 4 iv 5 v 6 vi 7 vii 8 viii 9 ix 10 x}
set R($n)
}
#-------------------------------------------------------------------------
# The following tests work as follows:
#
# 1.0: Open connection [db1] and populate the database.
#
# 1.1: Using "PRAGMA writable_schema", destroy the database schema on
# disk. The schema is still in memory, so it is possible to keep
# using it, but any attempt to reload it from disk will fail.
#
# 1.3-4: Open connection db2. Check that it can see the db schema. Then
# close db1 and check that db2 still works. This shows that closing
# db1 did not reset the in-memory schema.
#
# 1.5-7: Similar to 1.3-4.
#
# 1.8: Close all database connections (deleting the in-memory schema).
# Then open a new connection and check that it cannot read the db.
#
do_test 1.0 {
sqlite3 db1 test.db
db1 func roman roman
execsql {
CREATE TABLE t1(a, b);
INSERT INTO t1 VALUES(1, 1);
INSERT INTO t1 VALUES(2, 2);
INSERT INTO t1 VALUES(3, 3);
INSERT INTO t1 VALUES(4, 4);
CREATE VIEW v1 AS SELECT a, roman(b) FROM t1;
SELECT * FROM v1;
} db1
} {1 i 2 ii 3 iii 4 iv}
do_test 1.1 {
sqlite3_db_config db1 DEFENSIVE 0
execsql {
PRAGMA writable_schema = 1;
DELETE FROM sqlite_master WHERE 1;
PRAGMA writable_schema = 0;
SELECT * FROM sqlite_master;
} db1
} {}
do_test 1.2 {
execsql { SELECT * FROM v1 } db1
} {1 i 2 ii 3 iii 4 iv}
do_test 1.3 {
sqlite3 db2 test.db
db2 func roman roman
execsql { SELECT * FROM v1 } db2
} {1 i 2 ii 3 iii 4 iv}
do_test 1.4 {
db1 close
execsql { SELECT * FROM v1 } db2
} {1 i 2 ii 3 iii 4 iv}
do_test 1.5 {
sqlite3 db3 test.db
db3 func roman roman
execsql { SELECT * FROM v1 } db3
} {1 i 2 ii 3 iii 4 iv}
do_test 1.6 {
execsql { SELECT * FROM v1 } db2
} {1 i 2 ii 3 iii 4 iv}
do_test 1.7 {
db2 close
execsql { SELECT * FROM v1 } db3
} {1 i 2 ii 3 iii 4 iv}
do_test 1.8 {
db3 close
sqlite3 db4 test.db
catchsql { SELECT * FROM v1 } db4
} {1 {no such table: v1}}
foreach db {db1 db2 db3 db4} { catch { $db close } }
sqlite3_enable_shared_cache $::enable_shared_cache
finish_test
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