132 lines
3.4 KiB
Plaintext
132 lines
3.4 KiB
Plaintext
# 2005 January 19
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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: shared2.test,v 1.5 2007/08/23 02:47:54 drh Exp $
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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db close
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ifcapable !shared_cache {
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finish_test
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return
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}
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set ::enable_shared_cache [sqlite3_enable_shared_cache 1]
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# Test that if we delete all rows from a table any read-uncommitted
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# cursors are correctly invalidated. Test on both table and index btrees.
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do_test shared2-1.1 {
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sqlite3 db1 test.db
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sqlite3 db2 test.db
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# Set up some data. Table "numbers" has 64 rows after this block
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# is executed.
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execsql {
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BEGIN;
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CREATE TABLE numbers(a PRIMARY KEY, b);
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INSERT INTO numbers(oid) VALUES(NULL);
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INSERT INTO numbers(oid) SELECT NULL FROM numbers;
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INSERT INTO numbers(oid) SELECT NULL FROM numbers;
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INSERT INTO numbers(oid) SELECT NULL FROM numbers;
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INSERT INTO numbers(oid) SELECT NULL FROM numbers;
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INSERT INTO numbers(oid) SELECT NULL FROM numbers;
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INSERT INTO numbers(oid) SELECT NULL FROM numbers;
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UPDATE numbers set a = oid, b = 'abcdefghijklmnopqrstuvwxyz0123456789';
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COMMIT;
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} db1
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} {}
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do_test shared2-1.2 {
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# Put connection 2 in read-uncommitted mode and start a SELECT on table
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# 'numbers'. Half way through the SELECT, use connection 1 to delete the
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# contents of this table.
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execsql {
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pragma read_uncommitted = 1;
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} db2
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set count [execsql {SELECT count(*) FROM numbers} db2]
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db2 eval {SELECT a FROM numbers ORDER BY oid} {
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if {$a==32} {
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execsql {
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BEGIN;
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DELETE FROM numbers;
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} db1
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}
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}
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list $a $count
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} {32 64}
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do_test shared2-1.3 {
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# Same test as 1.2, except scan using the index this time.
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execsql {
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ROLLBACK;
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} db1
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set count [execsql {SELECT count(*) FROM numbers} db2]
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db2 eval {SELECT a, b FROM numbers ORDER BY a} {
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if {$a==32} {
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execsql {
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DELETE FROM numbers;
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} db1
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}
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}
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list $a $count
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} {32 64}
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#---------------------------------------------------------------------------
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# These tests, shared2.2.*, test the outcome when data is added to or
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# removed from a table due to a rollback while a read-uncommitted
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# cursor is scanning it.
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#
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do_test shared2-2.1 {
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execsql {
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INSERT INTO numbers VALUES(1, 'Medium length text field');
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INSERT INTO numbers VALUES(2, 'Medium length text field');
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INSERT INTO numbers VALUES(3, 'Medium length text field');
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INSERT INTO numbers VALUES(4, 'Medium length text field');
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BEGIN;
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DELETE FROM numbers WHERE (a%2)=0;
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} db1
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set res [list]
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db2 eval {
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SELECT a FROM numbers ORDER BY a;
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} {
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lappend res $a
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if {$a==3} {
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execsql {ROLLBACK} db1
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}
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}
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set res
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} {1 3 4}
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do_test shared2-2.2 {
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execsql {
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BEGIN;
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INSERT INTO numbers VALUES(5, 'Medium length text field');
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INSERT INTO numbers VALUES(6, 'Medium length text field');
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} db1
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set res [list]
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db2 eval {
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SELECT a FROM numbers ORDER BY a;
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} {
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lappend res $a
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if {$a==5} {
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execsql {ROLLBACK} db1
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}
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}
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set res
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} {1 2 3 4 5}
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db1 close
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db2 close
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do_test shared2-3.2 {
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sqlite3_enable_shared_cache 1
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} {1}
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sqlite3_enable_shared_cache $::enable_shared_cache
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finish_test
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