FCL/sf/os/persistentdata: comparison persistentstorage/sqlite3api/TEST/TclScript/shared.test

equal deleted inserted replaced

--1:000000000000
+:08ec8eefde2f
+# 2005 December 30
+#
+# Portions Copyright (c) 2007-2008 Nokia Corporation and/or its subsidiaries. All rights reserved.
+#
+# 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.
+#
+#***********************************************************************
+#
+# $Id: shared.test,v 1.34 2008/07/12 14:52:20 drh Exp $
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+db close
+# These tests cannot be run without the ATTACH command.
+#
+ifcapable !shared_cache||!attach {
+finish_test
+return
+}
+set ::enable_shared_cache [sqlite3_enable_shared_cache 1]
+foreach av [list 0 1] {
+# Open the database connection and execute the auto-vacuum pragma
+file delete -force test.db
+sqlite3 db test.db
+ifcapable autovacuum {
+do_test shared-[expr $av+1].1.0 {
+execsql "pragma auto_vacuum=$::av"
+execsql {pragma auto_vacuum}
+} "$av"
+} else {
+if {$av} {
+db close
+break
+}
+}
+# $av is currently 0 if this loop iteration is to test with auto-vacuum turned
+# off, and 1 if it is turned on. Increment it so that (1 -> no auto-vacuum)
+# and (2 -> auto-vacuum). The sole reason for this is so that it looks nicer
+# when we use this variable as part of test-case names.
+#
+incr av
+# Test organization:
+#
+# shared-1.*: Simple test to verify basic sanity of table level locking when
+#             two connections share a pager cache.
+# shared-2.*: Test that a read transaction can co-exist with a
+#             write-transaction, including a simple test to ensure the
+#             external locking protocol is still working.
+# shared-3.*: Simple test of read-uncommitted mode.
+# shared-4.*: Check that the schema is locked and unlocked correctly.
+# shared-5.*: Test that creating/dropping schema items works when databases
+#             are attached in different orders to different handles.
+# shared-6.*: Locking, UNION ALL queries and sub-queries.
+# shared-7.*: Autovacuum and shared-cache.
+# shared-8.*: Tests related to the text encoding of shared-cache databases.
+# shared-9.*: TEMP triggers and shared-cache databases.
+# shared-10.*: Tests of sqlite3_close().
+# shared-11.*: Test transaction locking.
+#
+do_test shared-$av.1.1 {
+# Open a second database on the file test.db. It should use the same pager
+# cache and schema as the original connection. Verify that only 1 file is
+# opened.
+sqlite3 db2 test.db
+set ::sqlite_open_file_count
+} {1}
+do_test shared-$av.1.2 {
+# Add a table and a single row of data via the first connection.
+# Ensure that the second connection can see them.
+execsql {
+CREATE TABLE abc(a, b, c);
+INSERT INTO abc VALUES(1, 2, 3);
+} db
+execsql {
+SELECT * FROM abc;
+} db2
+} {1 2 3}
+do_test shared-$av.1.3 {
+# Have the first connection begin a transaction and obtain a read-lock
+# on table abc. This should not prevent the second connection from
+# querying abc.
+execsql {
+BEGIN;
+SELECT * FROM abc;
+}
+execsql {
+SELECT * FROM abc;
+} db2
+} {1 2 3}
+do_test shared-$av.1.4 {
+# Try to insert a row into abc via connection 2. This should fail because
+# of the read-lock connection 1 is holding on table abc (obtained in the
+# previous test case).
+catchsql {
+INSERT INTO abc VALUES(4, 5, 6);
+} db2
+} {1 {database table is locked: abc}}
+do_test shared-$av.1.5 {
+# Using connection 2 (the one without the open transaction), try to create
+# a new table. This should fail because of the open read transaction
+# held by connection 1.
+catchsql {
+CREATE TABLE def(d, e, f);
+} db2
+} {1 {database table is locked: sqlite_master}}
+do_test shared-$av.1.6 {
+# Upgrade connection 1's transaction to a write transaction. Create
+# a new table - def - and insert a row into it. Because the connection 1
+# transaction modifies the schema, it should not be possible for
+# connection 2 to access the database at all until the connection 1
+# has finished the transaction.
+execsql {
+CREATE TABLE def(d, e, f);
+INSERT INTO def VALUES('IV', 'V', 'VI');
+}
+} {}
+do_test shared-$av.1.7 {
+# Read from the sqlite_master table with connection 1 (inside the
+# transaction). Then test that we can not do this with connection 2. This
+# is because of the schema-modified lock established by connection 1
+# in the previous test case.
+execsql {
+SELECT * FROM sqlite_master;
+}
+catchsql {
+SELECT * FROM sqlite_master;
+} db2
+} {1 {database schema is locked: main}}
+do_test shared-$av.1.8 {
+# Commit the connection 1 transaction.
+execsql {
+COMMIT;
+}
+} {}
+do_test shared-$av.2.1 {
+# Open connection db3 to the database. Use a different path to the same
+# file so that db3 does *not* share the same pager cache as db and db2
+# (there should be two open file handles).
+if {$::tcl_platform(platform)=="unix"} {
+sqlite3 db3 ./test.db
+} else {
+sqlite3 db3 TEST.DB
+}
+set ::sqlite_open_file_count
+} {2}
+do_test shared-$av.2.2 {
+# Start read transactions on db and db2 (the shared pager cache). Ensure
+# db3 cannot write to the database.
+execsql {
+BEGIN;
+SELECT * FROM abc;
+}
+execsql {
+BEGIN;
+SELECT * FROM abc;
+} db2
+catchsql {
+INSERT INTO abc VALUES(1, 2, 3);
+} db2
+} {1 {database table is locked: abc}}
+do_test shared-$av.2.3 {
+# Turn db's transaction into a write-transaction. db3 should still be
+# able to read from table def (but will not see the new row). Connection
+# db2 should not be able to read def (because of the write-lock).
+# Todo: The failed "INSERT INTO abc ..." statement in the above test
+# has started a write-transaction on db2 (should this be so?). This
+# would prevent connection db from starting a write-transaction. So roll the
+# db2 transaction back and replace it with a new read transaction.
+execsql {
+ROLLBACK;
+BEGIN;
+SELECT * FROM abc;
+} db2
+execsql {
+INSERT INTO def VALUES('VII', 'VIII', 'IX');
+}
+concat [
+catchsql { SELECT * FROM def; } db3
+] [
+catchsql { SELECT * FROM def; } db2
+]
+} {0 {IV V VI} 1 {database table is locked: def}}
+do_test shared-$av.2.4 {
+# Commit the open transaction on db. db2 still holds a read-transaction.
+# This should prevent db3 from writing to the database, but not from
+# reading.
+execsql {
+COMMIT;
+}
+concat [
+catchsql { SELECT * FROM def; } db3
+] [
+catchsql { INSERT INTO def VALUES('X', 'XI', 'XII'); } db3
+]
+} {0 {IV V VI VII VIII IX} 1 {database is locked}}
+catchsql COMMIT db2
+do_test shared-$av.3.1.1 {
+# This test case starts a linear scan of table 'seq' using a
+# read-uncommitted connection. In the middle of the scan, rows are added
+# to the end of the seq table (ahead of the current cursor position).
+# The uncommitted rows should be included in the results of the scan.
+execsql "
+CREATE TABLE seq(i PRIMARY KEY, x);
+INSERT INTO seq VALUES(1, '[string repeat X 500]');
+INSERT INTO seq VALUES(2, '[string repeat X 500]');
+"
+execsql {SELECT * FROM sqlite_master} db2
+execsql {PRAGMA read_uncommitted = 1} db2
+set ret [list]
+db2 eval {SELECT i FROM seq ORDER BY i} {
+if {$i < 4} {
+set max [execsql {SELECT max(i) FROM seq}]
+db eval {
+INSERT INTO seq SELECT i + :max, x FROM seq;
+}
+}
+lappend ret $i
+}
+set ret
+} {1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16}
+do_test shared-$av.3.1.2 {
+# Another linear scan through table seq using a read-uncommitted connection.
+# This time, delete each row as it is read. Should not affect the results of
+# the scan, but the table should be empty after the scan is concluded
+# (test 3.1.3 verifies this).
+set ret [list]
+db2 eval {SELECT i FROM seq} {
+db eval {DELETE FROM seq WHERE i = :i}
+lappend ret $i
+}
+set ret
+} {1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16}
+do_test shared-$av.3.1.3 {
+execsql {
+SELECT * FROM seq;
+}
+} {}
+catch {db close}
+catch {db2 close}
+catch {db3 close}
+#--------------------------------------------------------------------------
+# Tests shared-4.* test that the schema locking rules are applied
+# correctly. i.e.:
+#
+# 1. All transactions require a read-lock on the schemas of databases they
+#    access.
+# 2. Transactions that modify a database schema require a write-lock on that
+#    schema.
+# 3. It is not possible to compile a statement while another handle has a
+#    write-lock on the schema.
+#
+# Open two database handles db and db2. Each has a single attach database
+# (as well as main):
+#
+#     db.main   ->   ./test.db
+#     db.test2  ->   ./test2.db
+#     db2.main  ->   ./test2.db
+#     db2.test  ->   ./test.db
+#
+file delete -force test.db
+file delete -force test2.db
+file delete -force test2.db-journal
+sqlite3 db  test.db
+sqlite3 db2 test2.db
+do_test shared-$av.4.1.1 {
+set sqlite_open_file_count
+} {2}
+do_test shared-$av.4.1.2 {
+execsql {ATTACH 'test2.db' AS test2}
+set sqlite_open_file_count
+} {2}
+do_test shared-$av.4.1.3 {
+execsql {ATTACH 'test.db' AS test} db2
+set sqlite_open_file_count
+} {2}
+# Sanity check: Create a table in ./test.db via handle db, and test that handle
+# db2 can "see" the new table immediately. A handle using a seperate pager
+# cache would have to reload the database schema before this were possible.
+#
+do_test shared-$av.4.2.1 {
+execsql {
+CREATE TABLE abc(a, b, c);
+CREATE TABLE def(d, e, f);
+INSERT INTO abc VALUES('i', 'ii', 'iii');
+INSERT INTO def VALUES('I', 'II', 'III');
+}
+} {}
+do_test shared-$av.4.2.2 {
+execsql {
+SELECT * FROM test.abc;
+} db2
+} {i ii iii}
+# Open a read-transaction and read from table abc via handle 2. Check that
+# handle 1 can read table abc. Check that handle 1 cannot modify table abc
+# or the database schema. Then check that handle 1 can modify table def.
+#
+do_test shared-$av.4.3.1 {
+execsql {
+BEGIN;
+SELECT * FROM test.abc;
+} db2
+} {i ii iii}
+do_test shared-$av.4.3.2 {
+catchsql {
+INSERT INTO abc VALUES('iv', 'v', 'vi');
+}
+} {1 {database table is locked: abc}}
+do_test shared-$av.4.3.3 {
+catchsql {
+CREATE TABLE ghi(g, h, i);
+}
+} {1 {database table is locked: sqlite_master}}
+do_test shared-$av.4.3.3 {
+catchsql {
+INSERT INTO def VALUES('IV', 'V', 'VI');
+}
+} {0 {}}
+do_test shared-$av.4.3.4 {
+# Cleanup: commit the transaction opened by db2.
+execsql {
+COMMIT
+} db2
+} {}
+# Open a write-transaction using handle 1 and modify the database schema.
+# Then try to execute a compiled statement to read from the same
+# database via handle 2 (fails to get the lock on sqlite_master). Also
+# try to compile a read of the same database using handle 2 (also fails).
+# Finally, compile a read of the other database using handle 2. This
+# should also fail.
+#
+ifcapable compound {
+do_test shared-$av.4.4.1.2 {
+# Sanity check 1: Check that the schema is what we think it is when viewed
+# via handle 1.
+execsql {
+CREATE TABLE test2.ghi(g, h, i);
+SELECT 'test.db:'||name FROM sqlite_master
+UNION ALL
+SELECT 'test2.db:'||name FROM test2.sqlite_master;
+}
+} {test.db:abc test.db:def test2.db:ghi}
+do_test shared-$av.4.4.1.2 {
+# Sanity check 2: Check that the schema is what we think it is when viewed
+# via handle 2.
+execsql {
+SELECT 'test2.db:'||name FROM sqlite_master
+UNION ALL
+SELECT 'test.db:'||name FROM test.sqlite_master;
+} db2
+} {test2.db:ghi test.db:abc test.db:def}
+}
+do_test shared-$av.4.4.2 {
+set ::DB2 [sqlite3_connection_pointer db2]
+set sql {SELECT * FROM abc}
+set ::STMT1 [sqlite3_prepare $::DB2 $sql -1 DUMMY]
+execsql {
+BEGIN;
+CREATE TABLE jkl(j, k, l);
+}
+sqlite3_step $::STMT1
+} {SQLITE_ERROR}
+do_test shared-$av.4.4.3 {
+sqlite3_finalize $::STMT1
+} {SQLITE_LOCKED}
+do_test shared-$av.4.4.4 {
+set rc [catch {
+set ::STMT1 [sqlite3_prepare $::DB2 $sql -1 DUMMY]
+} msg]
+list $rc $msg
+} {1 {(6) database schema is locked: test}}
+do_test shared-$av.4.4.5 {
+set rc [catch {
+set ::STMT1 [sqlite3_prepare $::DB2 "SELECT * FROM ghi" -1 DUMMY]
+} msg]
+list $rc $msg
+} {1 {(6) database schema is locked: test}}
+catch {db2 close}
+catch {db close}
+#--------------------------------------------------------------------------
+# Tests shared-5.*
+#
+foreach db [list test.db test1.db test2.db test3.db] {
+file delete -force $db ${db}-journal
+}
+do_test shared-$av.5.1.1 {
+sqlite3 db1 test.db
+sqlite3 db2 test.db
+execsql {
+ATTACH 'test1.db' AS test1;
+ATTACH 'test2.db' AS test2;
+ATTACH 'test3.db' AS test3;
+} db1
+execsql {
+ATTACH 'test3.db' AS test3;
+ATTACH 'test2.db' AS test2;
+ATTACH 'test1.db' AS test1;
+} db2
+} {}
+do_test shared-$av.5.1.2 {
+execsql {
+CREATE TABLE test1.t1(a, b);
+CREATE INDEX test1.i1 ON t1(a, b);
+} db1
+} {}
+ifcapable view {
+do_test shared-$av.5.1.3 {
+execsql {
+CREATE VIEW test1.v1 AS SELECT * FROM t1;
+} db1
+} {}
+}
+ifcapable trigger {
+do_test shared-$av.5.1.4 {
+execsql {
+CREATE TRIGGER test1.trig1 AFTER INSERT ON t1 BEGIN
+INSERT INTO t1 VALUES(new.a, new.b);
+END;
+} db1
+} {}
+}
+do_test shared-$av.5.1.5 {
+execsql {
+DROP INDEX i1;
+} db2
+} {}
+ifcapable view {
+do_test shared-$av.5.1.6 {
+execsql {
+DROP VIEW v1;
+} db2
+} {}
+}
+ifcapable trigger {
+do_test shared-$av.5.1.7 {
+execsql {
+DROP TRIGGER trig1;
+} db2
+} {}
+}
+do_test shared-$av.5.1.8 {
+execsql {
+DROP TABLE t1;
+} db2
+} {}
+ifcapable compound {
+do_test shared-$av.5.1.9 {
+execsql {
+SELECT * FROM sqlite_master UNION ALL SELECT * FROM test1.sqlite_master
+} db1
+} {}
+}
+#--------------------------------------------------------------------------
+# Tests shared-6.* test that a query obtains all the read-locks it needs
+# before starting execution of the query. This means that there is no chance
+# some rows of data will be returned before a lock fails and SQLITE_LOCK
+# is returned.
+#
+do_test shared-$av.6.1.1 {
+execsql {
+CREATE TABLE t1(a, b);
+CREATE TABLE t2(a, b);
+INSERT INTO t1 VALUES(1, 2);
+INSERT INTO t2 VALUES(3, 4);
+} db1
+} {}
+ifcapable compound {
+do_test shared-$av.6.1.2 {
+execsql {
+SELECT * FROM t1 UNION ALL SELECT * FROM t2;
+} db2
+} {1 2 3 4}
+}
+do_test shared-$av.6.1.3 {
+# Establish a write lock on table t2 via connection db2. Then make a
+# UNION all query using connection db1 that first accesses t1, followed
+# by t2. If the locks are grabbed at the start of the statement (as
+# they should be), no rows are returned. If (as was previously the case)
+# they are grabbed as the tables are accessed, the t1 rows will be
+# returned before the query fails.
+#
+execsql {
+BEGIN;
+INSERT INTO t2 VALUES(5, 6);
+} db2
+set ret [list]
+catch {
+db1 eval {SELECT * FROM t1 UNION ALL SELECT * FROM t2} {
+lappend ret $a $b
+}
+}
+set ret
+} {}
+do_test shared-$av.6.1.4 {
+execsql {
+COMMIT;
+BEGIN;
+INSERT INTO t1 VALUES(7, 8);
+} db2
+set ret [list]
+catch {
+db1 eval {
+SELECT (CASE WHEN a>4 THEN (SELECT a FROM t1) ELSE 0 END) AS d FROM t2;
+} {
+lappend ret $d
+}
+}
+set ret
+} {}
+catch {db1 close}
+catch {db2 close}
+foreach f [list test.db test2.db] {
+file delete -force $f ${f}-journal
+}
+#--------------------------------------------------------------------------
+# Tests shared-7.* test auto-vacuum does not invalidate cursors from
+# other shared-cache users when it reorganizes the database on
+# COMMIT.
+#
+do_test shared-$av.7.1 {
+# This test case sets up a test database in auto-vacuum mode consisting
+# of two tables, t1 and t2. Both have a single index. Table t1 is
+# populated first (so consists of pages toward the start of the db file),
+# t2 second (pages toward the end of the file).
+sqlite3 db test.db
+sqlite3 db2 test.db
+execsql {
+BEGIN;
+CREATE TABLE t1(a PRIMARY KEY, b);
+CREATE TABLE t2(a PRIMARY KEY, b);
+}
+set ::contents {}
+for {set i 0} {$i < 100} {incr i} {
+set a [string repeat "$i " 20]
+set b [string repeat "$i " 20]
+db eval {
+INSERT INTO t1 VALUES(:a, :b);
+}
+lappend ::contents [list [expr $i+1] $a $b]
+}
+execsql {
+INSERT INTO t2 SELECT * FROM t1;
+COMMIT;
+}
+} {}
+#
+# Symbian: "stack overflow" if "shared-$av.7.2" is executed
+#
+if {$tcl_platform(platform)!="symbian"} {
+	do_test shared-$av.7.2 {
+	  # This test case deletes the contents of table t1 (the one at the start of
+	  # the file) while many cursors are open on table t2 and its index. All of
+	  # the non-root pages will be moved from the end to the start of the file
+	  # when the DELETE is committed - this test verifies that moving the pages
+	  # does not disturb the open cursors.
+	  #
+	  proc lockrow {db tbl oids body} {
+	    set ret [list]
+	    db eval "SELECT oid AS i, a, b FROM $tbl ORDER BY a" {
+	      if {$i==[lindex $oids 0]} {
+	        set noids [lrange $oids 1 end]
+	        if {[llength $noids]==0} {
+	          set subret [eval $body]
+	        } else {
+	          set subret [lockrow $db $tbl $noids $body]
+	        }
+	      }
+	      lappend ret [list $i $a $b]
+	    }
+	    return [linsert $subret 0 $ret]
+	  }
+	  proc locktblrows {db tbl body} {
+	    set oids [db eval "SELECT oid FROM $tbl"]
+	    lockrow $db $tbl $oids $body
+	  }
+	  set scans [locktblrows db t2 {
+	    execsql {
+	      DELETE FROM t1;
+	    } db2
+	  }]
+	  set error 0
+	  # Test that each SELECT query returned the expected contents of t2.
+	  foreach s $scans {
+	    if {[lsort -integer -index 0 $s]!=$::contents} {
+	      set error 1
+	    }
+	  }
+	  set error
+	} {0}
+}
+catch {db close}
+catch {db2 close}
+unset -nocomplain contents
+#--------------------------------------------------------------------------
+# The following tests try to trick the shared-cache code into assuming
+# the wrong encoding for a database.
+#
+file delete -force test.db test.db-journal
+ifcapable utf16 {
+do_test shared-$av.8.1.1 {
+sqlite3 db test.db
+execsql {
+PRAGMA encoding = 'UTF-16';
+SELECT * FROM sqlite_master;
+}
+} {}
+do_test shared-$av.8.1.2 {
+string range [execsql {PRAGMA encoding;}] 0 end-2
+} {UTF-16}
+do_test shared-$av.8.1.3 {
+sqlite3 db2 test.db
+execsql {
+PRAGMA encoding = 'UTF-8';
+CREATE TABLE abc(a, b, c);
+} db2
+} {}
+do_test shared-$av.8.1.4 {
+execsql {
+SELECT * FROM sqlite_master;
+}
+} "table abc abc [expr $AUTOVACUUM?3:2] {CREATE TABLE abc(a, b, c)}"
+do_test shared-$av.8.1.5 {
+db2 close
+execsql {
+PRAGMA encoding;
+}
+} {UTF-8}
+file delete -force test2.db test2.db-journal
+do_test shared-$av.8.2.1 {
+execsql {
+ATTACH 'test2.db' AS aux;
+SELECT * FROM aux.sqlite_master;
+}
+} {}
+do_test shared-$av.8.2.2 {
+sqlite3 db2 test2.db
+execsql {
+PRAGMA encoding = 'UTF-16';
+CREATE TABLE def(d, e, f);
+} db2
+string range [execsql {PRAGMA encoding;} db2] 0 end-2
+} {UTF-16}
+catch {db close}
+catch {db2 close}
+file delete -force test.db test2.db
+do_test shared-$av.8.3.2 {
+sqlite3 db test.db
+execsql { CREATE TABLE def(d, e, f) }
+execsql { PRAGMA encoding }
+} {UTF-8}
+do_test shared-$av.8.3.3 {
+set zDb16 "[encoding convertto unicode test.db]\x00\x00"
+set db16 [sqlite3_open16 $zDb16 {}]
+set stmt [sqlite3_prepare $db16 "SELECT sql FROM sqlite_master" -1 DUMMY]
+sqlite3_step $stmt
+set sql [sqlite3_column_text $stmt 0]
+sqlite3_finalize $stmt
+set sql
+} {CREATE TABLE def(d, e, f)}
+do_test shared-$av.8.3.4 {
+set stmt [sqlite3_prepare $db16 "PRAGMA encoding" -1 DUMMY]
+sqlite3_step $stmt
+set enc [sqlite3_column_text $stmt 0]
+sqlite3_finalize $stmt
+set enc
+} {UTF-8}
+sqlite3_close $db16
+# Bug #2547 is causing this to fail.
+if 0 {
+do_test shared-$av.8.2.3 {
+catchsql {
+SELECT * FROM aux.sqlite_master;
+}
+} {1 {attached databases must use the same text encoding as main database}}
+}
+}
+catch {db close}
+catch {db2 close}
+file delete -force test.db test2.db
+#---------------------------------------------------------------------------
+# The following tests - shared-9.* - test interactions between TEMP triggers
+# and shared-schemas.
+#
+ifcapable trigger&&tempdb {
+do_test shared-$av.9.1 {
+sqlite3 db test.db
+sqlite3 db2 test.db
+execsql {
+CREATE TABLE abc(a, b, c);
+CREATE TABLE abc_mirror(a, b, c);
+CREATE TEMP TRIGGER BEFORE INSERT ON abc BEGIN
+INSERT INTO abc_mirror(a, b, c) VALUES(new.a, new.b, new.c);
+END;
+INSERT INTO abc VALUES(1, 2, 3);
+SELECT * FROM abc_mirror;
+}
+} {1 2 3}
+do_test shared-$av.9.2 {
+execsql {
+INSERT INTO abc VALUES(4, 5, 6);
+SELECT * FROM abc_mirror;
+} db2
+} {1 2 3}
+do_test shared-$av.9.3 {
+db close
+db2 close
+} {}
+} ; # End shared-9.*
+#---------------------------------------------------------------------------
+# The following tests - shared-10.* - test that the library behaves
+# correctly when a connection to a shared-cache is closed.
+#
+do_test shared-$av.10.1 {
+# Create a small sample database with two connections to it (db and db2).
+file delete -force test.db
+sqlite3 db  test.db
+sqlite3 db2 test.db
+execsql {
+CREATE TABLE ab(a PRIMARY KEY, b);
+CREATE TABLE de(d PRIMARY KEY, e);
+INSERT INTO ab VALUES('Chiang Mai', 100000);
+INSERT INTO ab VALUES('Bangkok', 8000000);
+INSERT INTO de VALUES('Ubon', 120000);
+INSERT INTO de VALUES('Khon Kaen', 200000);
+}
+} {}
+do_test shared-$av.10.2 {
+# Open a read-transaction with the first connection, a write-transaction
+# with the second.
+execsql {
+BEGIN;
+SELECT * FROM ab;
+}
+execsql {
+BEGIN;
+INSERT INTO de VALUES('Pataya', 30000);
+} db2
+} {}
+do_test shared-$av.10.3 {
+# An external connection should be able to read the database, but not
+# prepare a write operation.
+if {$::tcl_platform(platform)=="unix"} {
+sqlite3 db3 ./test.db
+} else {
+sqlite3 db3 TEST.DB
+}
+execsql {
+SELECT * FROM ab;
+} db3
+catchsql {
+BEGIN;
+INSERT INTO de VALUES('Pataya', 30000);
+} db3
+} {1 {database is locked}}
+do_test shared-$av.10.4 {
+# Close the connection with the write-transaction open
+db2 close
+} {}
+do_test shared-$av.10.5 {
+# Test that the db2 transaction has been automatically rolled back.
+# If it has not the ('Pataya', 30000) entry will still be in the table.
+execsql {
+SELECT * FROM de;
+}
+} {Ubon 120000 {Khon Kaen} 200000}
+do_test shared-$av.10.5 {
+# Closing db2 should have dropped the shared-cache back to a read-lock.
+# So db3 should be able to prepare a write...
+catchsql {INSERT INTO de VALUES('Pataya', 30000);} db3
+} {0 {}}
+do_test shared-$av.10.6 {
+# ... but not commit it.
+catchsql {COMMIT} db3
+} {1 {database is locked}}
+do_test shared-$av.10.7 {
+# Commit the (read-only) db transaction. Check via db3 to make sure the
+# contents of table "de" are still as they should be.
+execsql {
+COMMIT;
+}
+execsql {
+SELECT * FROM de;
+} db3
+} {Ubon 120000 {Khon Kaen} 200000 Pataya 30000}
+do_test shared-$av.10.9 {
+# Commit the external transaction.
+catchsql {COMMIT} db3
+} {0 {}}
+integrity_check shared-$av.10.10
+do_test shared-$av.10.11 {
+db close
+db3 close
+} {}
+do_test shared-$av.11.1 {
+file delete -force test.db
+sqlite3 db  test.db
+sqlite3 db2 test.db
+execsql {
+CREATE TABLE abc(a, b, c);
+CREATE TABLE abc2(a, b, c);
+BEGIN;
+INSERT INTO abc VALUES(1, 2, 3);
+}
+} {}
+do_test shared-$av.11.2 {
+catchsql {BEGIN;} db2
+catchsql {SELECT * FROM abc;} db2
+} {1 {database table is locked: abc}}
+do_test shared-$av.11.3 {
+catchsql {BEGIN} db2
+} {1 {cannot start a transaction within a transaction}}
+do_test shared-$av.11.4 {
+catchsql {SELECT * FROM abc2;} db2
+} {0 {}}
+do_test shared-$av.11.5 {
+catchsql {INSERT INTO abc2 VALUES(1, 2, 3);} db2
+} {1 {database is locked}}
+do_test shared-$av.11.6 {
+catchsql {SELECT * FROM abc2}
+} {0 {}}
+do_test shared-$av.11.6 {
+execsql {
+ROLLBACK;
+PRAGMA read_uncommitted = 1;
+} db2
+} {}
+do_test shared-$av.11.7 {
+execsql {
+INSERT INTO abc2 VALUES(4, 5, 6);
+INSERT INTO abc2 VALUES(7, 8, 9);
+}
+} {}
+do_test shared-$av.11.8 {
+set res [list]
+db2 eval {
+SELECT abc.a as I, abc2.a as II FROM abc, abc2;
+} {
+execsql {
+DELETE FROM abc WHERE 1;
+}
+lappend res $I $II
+}
+set res
+} {1 4 {} 7}
+if {[llength [info command sqlite3_shared_cache_report]]==1} {
+do_test shared-$av.11.9 {
+string tolower [sqlite3_shared_cache_report]
+} [string tolower [list [file nativename [file normalize test.db]] 2]]
+}
+do_test shared-$av.11.11 {
+db close
+db2 close
+} {}
+# This tests that if it is impossible to free any pages, SQLite will
+# exceed the limit set by PRAGMA cache_size.
+file delete -force test.db test.db-journal
+sqlite3 db test.db
+ifcapable pager_pragmas {
+do_test shared-$av.12.1 {
+execsql {
+PRAGMA cache_size = 10;
+PRAGMA cache_size;
+}
+} {10}
+}
+do_test shared-$av.12.2 {
+set ::db_handles [list]
+for {set i 1} {$i < 15} {incr i} {
+lappend ::db_handles db$i
+sqlite3 db$i test.db
+execsql "CREATE TABLE db${i}(a, b, c)" db$i
+execsql "INSERT INTO db${i} VALUES(1, 2, 3)"
+}
+} {}
+proc nested_select {handles} {
+[lindex $handles 0] eval "SELECT * FROM [lindex $handles 0]" {
+lappend ::res $a $b $c
+if {[llength $handles]>1} {
+nested_select [lrange $handles 1 end]
+}
+}
+}
+do_test shared-$av.12.3 {
+set ::res [list]
+nested_select $::db_handles
+set ::res
+} [string range [string repeat "1 2 3 " [llength $::db_handles]] 0 end-1]
+do_test shared-$av.12.X {
+db close
+foreach h $::db_handles {
+$h close
+}
+} {}
+# Internally, locks are acquired on shared B-Tree structures in the order
+# that the structures appear in the virtual memory address space. This
+# test case attempts to cause the order of the structures in memory
+# to be different from the order in which they are attached to a given
+# database handle. This covers an extra line or two.
+#
+do_test shared-$av.13.1 {
+file delete -force test2.db test3.db test4.db test5.db
+sqlite3 db :memory:
+execsql {
+ATTACH 'test2.db' AS aux2;
+ATTACH 'test3.db' AS aux3;
+ATTACH 'test4.db' AS aux4;
+ATTACH 'test5.db' AS aux5;
+DETACH aux2;
+DETACH aux3;
+DETACH aux4;
+ATTACH 'test2.db' AS aux2;
+ATTACH 'test3.db' AS aux3;
+ATTACH 'test4.db' AS aux4;
+}
+} {}
+do_test shared-$av.13.2 {
+execsql {
+CREATE TABLE t1(a, b, c);
+CREATE TABLE aux2.t2(a, b, c);
+CREATE TABLE aux3.t3(a, b, c);
+CREATE TABLE aux4.t4(a, b, c);
+CREATE TABLE aux5.t5(a, b, c);
+SELECT count(*) FROM
+aux2.sqlite_master,
+aux3.sqlite_master,
+aux4.sqlite_master,
+aux5.sqlite_master
+}
+} {1}
+do_test shared-$av.13.3 {
+db close
+} {}
+# Test that nothing horrible happens if a connection to a shared B-Tree
+# structure is closed while some other connection has an open cursor.
+#
+do_test shared-$av.14.1 {
+sqlite3 db test.db
+sqlite3 db2 test.db
+execsql {SELECT name FROM sqlite_master}
+} {db1 db2 db3 db4 db5 db6 db7 db8 db9 db10 db11 db12 db13 db14}
+do_test shared-$av.14.2 {
+set res [list]
+db eval {SELECT name FROM sqlite_master} {
+if {$name eq "db7"} {
+db2 close
+}
+lappend res $name
+}
+set res
+} {db1 db2 db3 db4 db5 db6 db7 db8 db9 db10 db11 db12 db13 db14}
+do_test shared-$av.14.3 {
+db close
+} {}
+}
+sqlite3_enable_shared_cache $::enable_shared_cache
+finish_test