139 lines
3.6 KiB
Plaintext
139 lines
3.6 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 1.1 2009/04/01 09:41:54 danielk1977 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 shared7-1.1.1 {
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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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} {}
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do_test shared7-1.1.2 {
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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 shared7-1.1.3 {
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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 shared7-1.2.1 {
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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 shared7-1.2.2 {
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execsql { SELECT * FROM t1 } db1
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} {}
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do_test shared7-1.2.3 {
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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 shared7-1.2.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 shared7-1.3.1 {
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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 shared7-1.3.2 {
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execsql { SELECT * FROM t2 } db2
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} {3 4}
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do_test shared7-1.3.3 {
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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 shared7-1.3.4 {
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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 shared7-1.3.5 {
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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 shared7-1.3.5 {
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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 shared7-1.3.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 shared7-1.4.1 {
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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 shared7-1.4.2 {
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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 shared7-1.4.3 {
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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 shared7-1.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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