1# 2005 January 19 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# $Id: shared2.test,v 1.8 2009/06/05 17:09:12 drh Exp $ 13 14set testdir [file dirname $argv0] 15source $testdir/tester.tcl 16source $testdir/lock_common.tcl 17source $testdir/malloc_common.tcl 18db close 19 20ifcapable !shared_cache { 21 finish_test 22 return 23} 24set ::enable_shared_cache [sqlite3_enable_shared_cache 1] 25 26# Test that if we delete all rows from a table any read-uncommitted 27# cursors are correctly invalidated. Test on both table and index btrees. 28do_test shared2-1.1 { 29 sqlite3 db1 test.db 30 sqlite3 db2 test.db 31 32 # Set up some data. Table "numbers" has 64 rows after this block 33 # is executed. 34 execsql { 35 BEGIN; 36 CREATE TABLE numbers(a PRIMARY KEY, b); 37 INSERT INTO numbers(oid) VALUES(NULL); 38 INSERT INTO numbers(oid) SELECT NULL FROM numbers; 39 INSERT INTO numbers(oid) SELECT NULL FROM numbers; 40 INSERT INTO numbers(oid) SELECT NULL FROM numbers; 41 INSERT INTO numbers(oid) SELECT NULL FROM numbers; 42 INSERT INTO numbers(oid) SELECT NULL FROM numbers; 43 INSERT INTO numbers(oid) SELECT NULL FROM numbers; 44 UPDATE numbers set a = oid, b = 'abcdefghijklmnopqrstuvwxyz0123456789'; 45 COMMIT; 46 } db1 47} {} 48do_test shared2-1.2 { 49 # Put connection 2 in read-uncommitted mode and start a SELECT on table 50 # 'numbers'. Half way through the SELECT, use connection 1 to delete the 51 # contents of this table. 52 execsql { 53 pragma read_uncommitted = 1; 54 } db2 55 set count [execsql {SELECT count(*) FROM numbers} db2] 56 db2 eval {SELECT a FROM numbers ORDER BY oid} { 57 if {$a==32} { 58 execsql { 59 BEGIN; 60 DELETE FROM numbers; 61 } db1 62 } 63 } 64 list $a $count 65} {32 64} 66do_test shared2-1.3 { 67 # Same test as 1.2, except scan using the index this time. 68 execsql { 69 ROLLBACK; 70 } db1 71 set count [execsql {SELECT count(*) FROM numbers} db2] 72 db2 eval {SELECT a, b FROM numbers ORDER BY a} { 73 if {$a==32} { 74 execsql { 75 DELETE FROM numbers; 76 } db1 77 } 78 } 79 list $a $count 80} {32 64} 81 82 83db1 close 84db2 close 85 86do_test shared2-3.2 { 87 sqlite3_enable_shared_cache 1 88} {1} 89 90forcedelete test.db 91 92sqlite3 db test.db 93do_test shared2-4.1 { 94 execsql { 95 CREATE TABLE t0(a, b); 96 CREATE TABLE t1(a, b DEFAULT 'hello world'); 97 } 98} {} 99db close 100 101sqlite3 db test.db 102sqlite3 db2 test.db 103 104do_test shared2-4.2 { 105 execsql { SELECT a, b FROM t0 } db 106 execsql { INSERT INTO t1(a) VALUES(1) } db2 107} {} 108 109do_test shared2-4.3 { 110 db2 close 111 db close 112} {} 113 114# At one point, this was causing a crash. 115# 116do_test shared2-5.1 { 117 sqlite3 db test.db 118 sqlite3 db2 test.db 119 execsql { CREATE TABLE t2(a, b, c) } 120 121 # The following statement would crash when attempting to sqlite3_free() 122 # a pointer allocated from a lookaside buffer. 123 execsql { CREATE INDEX i1 ON t2(a) } db2 124} {} 125 126db close 127db2 close 128 129# The following test verifies that shared-cache mode does not automatically 130# turn on exclusive-locking mode for some reason. 131do_multiclient_test {tn} { 132 sql1 { CREATE TABLE t1(a, b) } 133 sql2 { CREATE TABLE t2(a, b) } 134 do_test shared2-6.$tn.1 { sql1 { SELECT * FROM t2 } } {} 135 do_test shared2-6.$tn.2 { sql2 { SELECT * FROM t1 } } {} 136} 137 138sqlite3_enable_shared_cache $::enable_shared_cache 139finish_test 140