1# 2009 April 01 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: shared6.test,v 1.1 2009/04/01 09:41:54 danielk1977 Exp $ 13 14set testdir [file dirname $argv0] 15source $testdir/tester.tcl 16ifcapable !shared_cache { finish_test ; return } 17 18do_test shared7-1.1.1 { 19 execsql { 20 CREATE TABLE t1(a, b); 21 CREATE TABLE t2(c, d); 22 CREATE TABLE t3(e, f); 23 } 24} {} 25do_test shared7-1.1.2 { 26 set ::enable_shared_cache [sqlite3_enable_shared_cache 1] 27 sqlite3_enable_shared_cache 28} {1} 29 30do_test shared7-1.1.3 { 31 sqlite3 db1 test.db 32 sqlite3 db2 test.db 33} {} 34 35# Exclusive shared-cache locks. Test the following: 36# 37# 1.2.1: If [db1] has an exclusive lock, [db2] cannot read. 38# 1.2.2: If [db1] has an exclusive lock, [db1] can read. 39# 1.2.3: If [db1] has a non-exclusive write-lock, [db2] can read. 40# 41do_test shared7-1.2.1 { 42 execsql { SELECT * FROM t1 } db2 ;# Cache a compiled statement 43 execsql { BEGIN EXCLUSIVE } db1 44 catchsql { SELECT * FROM t1 } db2 ;# Execute the cached compiled statement 45} {1 {database table is locked}} 46do_test shared7-1.2.2 { 47 execsql { SELECT * FROM t1 } db1 48} {} 49do_test shared7-1.2.3 { 50 execsql { 51 COMMIT; 52 BEGIN; 53 INSERT INTO t2 VALUES(3, 4); 54 } db1 55 execsql { SELECT * FROM t1 } db2 56} {} 57do_test shared7-1.2.X { 58 execsql { COMMIT } db1 59} {} 60 61# Regular shared-cache locks. Verify the following: 62# 63# 1.3.1: If [db1] has a write-lock on t1, [db1] can read from t1. 64# 1.3.2: If [db1] has a write-lock on t1, [db2] can read from t2. 65# 1.3.3: If [db1] has a write-lock on t1, [db2] cannot read from t1. 66# 1.3.4: If [db1] has a write-lock on t1, [db2] cannot write to t1. 67# 1.3.5: If [db1] has a read-lock on t1, [db2] can read from t1. 68# 1.3.6: If [db1] has a read-lock on t1, [db2] cannot write to t1. 69# 70do_test shared7-1.3.1 { 71 execsql { 72 BEGIN; 73 INSERT INTO t1 VALUES(1, 2); 74 } db1 75 execsql { SELECT * FROM t1 } db1 76} {1 2} 77do_test shared7-1.3.2 { 78 execsql { SELECT * FROM t2 } db2 79} {3 4} 80do_test shared7-1.3.3 { 81 catchsql { SELECT * FROM t1 } db2 82} {1 {database table is locked: t1}} 83do_test shared7-1.3.4 { 84 catchsql { INSERT INTO t2 VALUES(1, 2) } db2 85} {1 {database table is locked}} 86do_test shared7-1.3.5 { 87 execsql { 88 COMMIT; 89 BEGIN; 90 SELECT * FROM t1; 91 } db1 92 execsql { SELECT * FROM t1 } db2 93} {1 2} 94do_test shared7-1.3.5 { 95 catchsql { INSERT INTO t1 VALUES(5, 6) } db2 96} {1 {database table is locked: t1}} 97do_test shared7-1.3.X { 98 execsql { COMMIT } db1 99} {} 100 101# Read-uncommitted mode. 102# 103# For these tests, connection [db2] is in read-uncommitted mode. 104# 105# 1.4.1: If [db1] has a write-lock on t1, [db2] can still read from t1. 106# 1.4.2: If [db1] has a write-lock on the db schema (sqlite_master table), 107# [db2] cannot read from the schema. 108# 1.4.3: If [db1] has a read-lock on t1, [db2] cannot write to t1. 109# 110do_test shared7-1.4.1 { 111 execsql { PRAGMA read_uncommitted = 1 } db2 112 execsql { 113 BEGIN; 114 INSERT INTO t1 VALUES(5, 6); 115 } db1 116 execsql { SELECT * FROM t1 } db2 117} {1 2 5 6} 118do_test shared7-1.4.2 { 119 execsql { CREATE TABLE t4(a, b) } db1 120 catchsql { SELECT * FROM t1 } db2 121} {1 {database table is locked}} 122do_test shared7-1.4.3 { 123 execsql { 124 COMMIT; 125 BEGIN; 126 SELECT * FROM t1; 127 } db1 128 catchsql { INSERT INTO t1 VALUES(7, 8) } db2 129} {1 {database table is locked: t1}} 130 131do_test shared7-1.X { 132 db1 close 133 db2 close 134} {} 135 136sqlite3_enable_shared_cache $::enable_shared_cache 137finish_test 138 139