1# 2012 May 15 2# 3# The author disclaims copyright to this source code. In place of 4# a legal notice, here is a blessing: 5# 6# May you do good and not evil. 7# May you find forgiveness for yourself and forgive others. 8# May you share freely, never taking more than you give. 9# 10#*********************************************************************** 11# 12# The tests in this file are intended to show that closing one database 13# connection to a shared-cache while there exist other connections (a) 14# does not cause the schema to be reloaded and (b) does not cause any 15# other problems. 16# 17 18set testdir [file dirname $argv0] 19source $testdir/tester.tcl 20ifcapable !shared_cache { finish_test ; return } 21set testprefix shared8 22 23db close 24set ::enable_shared_cache [sqlite3_enable_shared_cache 1] 25do_test 0.0 { sqlite3_enable_shared_cache } {1} 26 27proc roman {n} { 28 array set R {1 i 2 ii 3 iii 4 iv 5 v 6 vi 7 vii 8 viii 9 ix 10 x} 29 set R($n) 30} 31 32#------------------------------------------------------------------------- 33# The following tests work as follows: 34# 35# 1.0: Open connection [db1] and populate the database. 36# 37# 1.1: Using "PRAGMA writable_schema", destroy the database schema on 38# disk. The schema is still in memory, so it is possible to keep 39# using it, but any attempt to reload it from disk will fail. 40# 41# 1.3-4: Open connection db2. Check that it can see the db schema. Then 42# close db1 and check that db2 still works. This shows that closing 43# db1 did not reset the in-memory schema. 44# 45# 1.5-7: Similar to 1.3-4. 46# 47# 1.8: Close all database connections (deleting the in-memory schema). 48# Then open a new connection and check that it cannot read the db. 49# 50do_test 1.0 { 51 sqlite3 db1 test.db 52 db1 func roman roman 53 execsql { 54 CREATE TABLE t1(a, b); 55 INSERT INTO t1 VALUES(1, 1); 56 INSERT INTO t1 VALUES(2, 2); 57 INSERT INTO t1 VALUES(3, 3); 58 INSERT INTO t1 VALUES(4, 4); 59 CREATE VIEW v1 AS SELECT a, roman(b) FROM t1; 60 SELECT * FROM v1; 61 } db1 62} {1 i 2 ii 3 iii 4 iv} 63 64do_test 1.1 { 65 execsql { 66 PRAGMA writable_schema = 1; 67 DELETE FROM sqlite_master WHERE 1; 68 PRAGMA writable_schema = 0; 69 SELECT * FROM sqlite_master; 70 } db1 71} {} 72 73do_test 1.2 { 74 execsql { SELECT * FROM v1 } db1 75} {1 i 2 ii 3 iii 4 iv} 76 77do_test 1.3 { 78 sqlite3 db2 test.db 79 db2 func roman roman 80 execsql { SELECT * FROM v1 } db2 81} {1 i 2 ii 3 iii 4 iv} 82 83do_test 1.4 { 84 db1 close 85 execsql { SELECT * FROM v1 } db2 86} {1 i 2 ii 3 iii 4 iv} 87 88do_test 1.5 { 89 sqlite3 db3 test.db 90 db3 func roman roman 91 execsql { SELECT * FROM v1 } db3 92} {1 i 2 ii 3 iii 4 iv} 93 94do_test 1.6 { 95 execsql { SELECT * FROM v1 } db2 96} {1 i 2 ii 3 iii 4 iv} 97 98do_test 1.7 { 99 db2 close 100 execsql { SELECT * FROM v1 } db3 101} {1 i 2 ii 3 iii 4 iv} 102 103do_test 1.8 { 104 db3 close 105 sqlite3 db4 test.db 106 catchsql { SELECT * FROM v1 } db4 107} {1 {no such table: v1}} 108 109 110foreach db {db1 db2 db3 db4} { catch { $db close } } 111sqlite3_enable_shared_cache $::enable_shared_cache 112finish_test 113