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256 lines
6.5 KiB
Plaintext
256 lines
6.5 KiB
Plaintext
# 2009 April 01
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#
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# The author disclaims copyright to this source code. In place of
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# a legal notice, here is a blessing:
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#
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# May you do good and not evil.
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# May you find forgiveness for yourself and forgive others.
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# May you share freely, never taking more than you give.
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#
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#***********************************************************************
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#
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# $Id: shared6.test,v 1.4 2009/06/05 17:09:12 drh Exp $
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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ifcapable !shared_cache { finish_test ; return }
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do_test shared6-1.1.1 {
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execsql {
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CREATE TABLE t1(a, b);
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CREATE TABLE t2(c, d);
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CREATE TABLE t3(e, f);
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}
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db close
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} {}
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do_test shared6-1.1.2 {
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set ::enable_shared_cache [sqlite3_enable_shared_cache 1]
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sqlite3_enable_shared_cache
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} {1}
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do_test shared6-1.1.3 {
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sqlite3 db1 test.db
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sqlite3 db2 test.db
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} {}
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# Exclusive shared-cache locks. Test the following:
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#
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# 1.2.1: If [db1] has an exclusive lock, [db2] cannot read.
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# 1.2.2: If [db1] has an exclusive lock, [db1] can read.
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# 1.2.3: If [db1] has a non-exclusive write-lock, [db2] can read.
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#
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do_test shared6-1.2.1 {
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execsql { SELECT * FROM t1 } db2 ;# Cache a compiled statement
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execsql { BEGIN EXCLUSIVE } db1
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catchsql { SELECT * FROM t1 } db2 ;# Execute the cached compiled statement
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} {1 {database table is locked}}
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do_test shared6-1.2.2 {
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execsql { SELECT * FROM t1 } db1
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} {}
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do_test shared6-1.2.3 {
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execsql {
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COMMIT;
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BEGIN;
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INSERT INTO t2 VALUES(3, 4);
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} db1
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execsql { SELECT * FROM t1 } db2
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} {}
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do_test shared6-1.2.X {
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execsql { COMMIT } db1
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} {}
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# Regular shared-cache locks. Verify the following:
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#
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# 1.3.1: If [db1] has a write-lock on t1, [db1] can read from t1.
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# 1.3.2: If [db1] has a write-lock on t1, [db2] can read from t2.
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# 1.3.3: If [db1] has a write-lock on t1, [db2] cannot read from t1.
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# 1.3.4: If [db1] has a write-lock on t1, [db2] cannot write to t1.
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# 1.3.5: If [db1] has a read-lock on t1, [db2] can read from t1.
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# 1.3.6: If [db1] has a read-lock on t1, [db2] cannot write to t1.
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#
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do_test shared6-1.3.1 {
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execsql {
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BEGIN;
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INSERT INTO t1 VALUES(1, 2);
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} db1
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execsql { SELECT * FROM t1 } db1
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} {1 2}
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do_test shared6-1.3.2 {
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execsql { SELECT * FROM t2 } db2
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} {3 4}
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do_test shared6-1.3.3 {
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catchsql { SELECT * FROM t1 } db2
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} {1 {database table is locked: t1}}
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do_test shared6-1.3.4 {
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catchsql { INSERT INTO t2 VALUES(1, 2) } db2
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} {1 {database table is locked}}
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do_test shared6-1.3.5 {
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execsql {
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COMMIT;
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BEGIN;
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SELECT * FROM t1;
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} db1
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execsql { SELECT * FROM t1 } db2
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} {1 2}
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do_test shared6-1.3.5 {
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catchsql { INSERT INTO t1 VALUES(5, 6) } db2
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} {1 {database table is locked: t1}}
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do_test shared6-1.3.X {
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execsql { COMMIT } db1
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} {}
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# Read-uncommitted mode.
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#
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# For these tests, connection [db2] is in read-uncommitted mode.
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#
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# 1.4.1: If [db1] has a write-lock on t1, [db2] can still read from t1.
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# 1.4.2: If [db1] has a write-lock on the db schema (sqlite_master table),
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# [db2] cannot read from the schema.
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# 1.4.3: If [db1] has a read-lock on t1, [db2] cannot write to t1.
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#
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do_test shared6-1.4.1 {
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execsql { PRAGMA read_uncommitted = 1 } db2
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execsql {
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BEGIN;
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INSERT INTO t1 VALUES(5, 6);
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} db1
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execsql { SELECT * FROM t1 } db2
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} {1 2 5 6}
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do_test shared6-1.4.2 {
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execsql { CREATE TABLE t4(a, b) } db1
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catchsql { SELECT * FROM t1 } db2
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} {1 {database table is locked}}
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do_test shared6-1.4.3 {
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execsql {
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COMMIT;
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BEGIN;
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SELECT * FROM t1;
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} db1
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catchsql { INSERT INTO t1 VALUES(7, 8) } db2
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} {1 {database table is locked: t1}}
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do_test shared6-1.X {
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db1 close
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db2 close
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} {}
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#-------------------------------------------------------------------------
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# The following tests - shared6-2.* - test that two database connections
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# that connect to the same file using different VFS implementations do
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# not share a cache.
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#
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if {$::tcl_platform(platform) eq "unix"} {
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do_test shared6-2.1 {
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sqlite3 db1 test.db -vfs unix
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sqlite3 db2 test.db -vfs unix
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sqlite3 db3 test.db -vfs unix-none
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sqlite3 db4 test.db -vfs unix-none
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} {}
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do_test shared6-2.2 {
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execsql { BEGIN; INSERT INTO t1 VALUES(9, 10); } db1
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catchsql { SELECT * FROM t1 } db2
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} {1 {database table is locked: t1}}
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do_test shared6-2.3 {
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execsql { SELECT * FROM t1 } db3
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} {1 2 5 6}
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do_test shared6-2.3 {
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execsql { COMMIT } db1
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execsql { BEGIN; INSERT INTO t1 VALUES(11, 12); } db3
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catchsql { SELECT * FROM t1 } db4
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} {1 {database table is locked: t1}}
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do_test shared6-2.4 {
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execsql { SELECT * FROM t1 } db1
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} {1 2 5 6 9 10}
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do_test shared6-2.5 {
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execsql { COMMIT } db3
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} {}
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do_test shared6-2.X {
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db1 close
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db2 close
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db3 close
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db4 close
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} {}
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}
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#-------------------------------------------------------------------------
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# Test that it is possible to open an exclusive transaction while
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# already holding a read-lock on the database file. And that it is
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# not possible if some other connection holds such a lock.
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#
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do_test shared6-3.1 {
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sqlite3 db1 test.db
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sqlite3 db2 test.db
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sqlite3 db3 test.db
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} {}
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db1 eval {SELECT * FROM t1} {
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# Within this block [db1] is holding a read-lock on t1. Test that
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# this means t1 cannot be written by [db2].
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#
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do_test shared6-3.2 {
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catchsql { INSERT INTO t1 VALUES(1, 2) } db2
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} {1 {database table is locked: t1}}
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do_test shared6-3.3 {
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execsql { BEGIN EXCLUSIVE } db1
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} {}
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break
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}
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do_test shared6-3.4 {
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catchsql { SELECT * FROM t1 } db2
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} {1 {database schema is locked: main}}
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do_test shared6-3.5 {
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execsql COMMIT db1
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} {}
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db2 eval {SELECT * FROM t1} {
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do_test shared6-3.6 {
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catchsql { BEGIN EXCLUSIVE } db1
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} {1 {database table is locked}}
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break
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}
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do_test shared6-3.7 {
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execsql { BEGIN } db1
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execsql { BEGIN } db2
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} {}
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db2 eval {SELECT * FROM t1} {
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do_test shared6-3.8 {
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catchsql { INSERT INTO t1 VALUES(1, 2) } db1
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} {1 {database table is locked: t1}}
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break
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}
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do_test shared6-3.9 {
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execsql { BEGIN ; ROLLBACK } db3
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} {}
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do_test shared6-3.10 {
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catchsql { SELECT * FROM t1 } db3
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} {1 {database table is locked}}
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do_test shared6-3.X {
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db1 close
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db2 close
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db3 close
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} {}
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do_test shared6-4.1 {
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#forcedelete test.db test.db-journal
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sqlite3 db1 test.db
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sqlite3 db2 test.db
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set ::STMT [sqlite3_prepare_v2 db1 "SELECT * FROM t1" -1 DUMMY]
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execsql { CREATE TABLE t5(a, b) } db2
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} {}
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do_test shared6-4.2 {
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sqlite3_finalize $::STMT
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} {SQLITE_OK}
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do_test shared6-4.X {
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db1 close
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db2 close
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} {}
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sqlite3_enable_shared_cache $::enable_shared_cache
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finish_test
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