mirror of https://github.com/sqlite/sqlite
118 lines
2.8 KiB
Plaintext
118 lines
2.8 KiB
Plaintext
# 2001 September 15
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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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# This file implements regression tests for SQLite library. The focus
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# of this file is modifications made to tables while SELECT queries are
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# active on the tables. Using this capability in a program is tricky
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# because results can be difficult to predict, but can be useful.
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#
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# $Id: lock4.test,v 1.1 2004/11/17 16:41:29 danielk1977 Exp $
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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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do_test lock4-1.0 {
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execsql {
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CREATE TABLE t1(a, b);
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INSERT INTO t1 VALUES(1, 2);
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}
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} {}
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# Check that we can INSERT into a table while doing a SELECT on it.
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do_test lock4-1.1 {
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db eval {SELECT * FROM t1} {
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if {$a<5} {
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execsql "INSERT INTO t1 VALUES($a+1, ($a+1)*2)"
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}
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}
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} {}
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do_test lock4-1.2 {
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execsql {
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SELECT * FROM t1
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}
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} {1 2 2 4 3 6 4 8 5 10}
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# Check that we can UPDATE a table while doing a SELECT on it.
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do_test lock4-1.3 {
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db eval {SELECT * FROM t1 WHERE (a%2)=0} {
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execsql "UPDATE t1 SET b = b/2 WHERE a = $a"
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}
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} {}
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do_test lock4-1.4 {
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execsql {
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SELECT * FROM t1
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}
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} {1 2 2 2 3 6 4 4 5 10}
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# Check that we can DELETE from a table while doing a SELECT on it.
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do_test lock4-1.5 {
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db eval {SELECT * FROM t1 WHERE (a%2)=0} {
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execsql "DELETE FROM t1 WHERE a = $a"
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}
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} {}
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do_test lock4-1.6 {
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execsql {
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SELECT * FROM t1
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}
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} {1 2 3 6 5 10}
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# Check what happens when a row is deleted while a cursor is still using
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# the row (because of a SELECT that does a join).
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do_test lock4-2.0 {
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execsql {
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CREATE TABLE t2(c);
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INSERT INTO t2 VALUES('one');
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INSERT INTO t2 VALUES('two');
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}
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} {}
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do_test lock4-2.1 {
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set res [list]
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db eval {SELECT a, b, c FROM t1, t2} {
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lappend res $a $b $c
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if {0==[string compare $c one]} {
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execsql "DELETE FROM t1 WHERE a = $a"
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}
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}
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set res
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} {1 2 one 1 2 two 3 6 one 3 6 two 5 10 one 5 10 two}
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do_test lock4-2.2 {
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execsql {
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SELECT * FROM t1;
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}
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} {}
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# do_test lock4-2.3 {
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# execsql "
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# INSERT INTO t1 VALUES('[string repeat 1 750]', '[string repeat 2 750]')
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# "
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# } {}
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# do_test lock4-2.4 {
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# set res [list]
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# db eval {SELECT a, b, c FROM t1, t2} {
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# lappend res $a $b $c
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# if {0==[string compare $c one]} {
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# execsql "DELETE FROM t1 WHERE a = '$a'"
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# }
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# }
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# set res
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# } [list \
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# [string repeat 1 750] [string repeat 2 750] one \
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# [string repeat 1 750] [string repeat 2 750] two
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# ]
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# do_test lock4-2.5 {
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# execsql {
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# SELECT * FROM t1;
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# }
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# } {}
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finish_test
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