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# 2011 February 21
#
# 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.
#
#***********************************************************************
# This file implements regression tests for SQLite library.
#
# This file implements tests to verify that ticket [b72787b1a7] has been
# fixed. From the ticket:
#
# The sqlite3ExpirePreparedStatements routine marks all statements
# as expired. This includes statements that are not expired.
#
# Steps to reproduce:
#
# * Prepare a statement (A)
# * Alter the schema to invalidate cookie in A
# * Prepare a statement (B)
# * Run B and have A run as part of B
# * A will find a bad cookie and cause *all* statements
# to be expired including the currently running B by calling
# sqlite3ExpirePreparedStatements
# * When control returns to B it will then abort
#
# The bug is that sqlite3ExpirePreparedStatements expires all statements.
# Note that B was prepared after the schema change and hence is perfectly
# valid and then is marked as expired while running.
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
ifcapable !compound {
finish_test
return
}
unset -nocomplain ::STMT
proc runsql {} {
db eval {CREATE TABLE IF NOT EXISTS t4(q)}
sqlite3_step $::STMT
set rc [sqlite3_column_int $::STMT 0]
sqlite3_reset $::STMT
return $rc
}
do_test tkt-b72787b1.1 {
db eval {
CREATE TABLE t1(x);
INSERT INTO t1 VALUES(1);
INSERT INTO t1 VALUES(2);
CREATE TABLE t2(y);
INSERT INTO t2 SELECT x+2 FROM t1;
INSERT INTO t2 SELECT x+4 FROM t1;
}
db func runsql ::runsql
set DB [sqlite3_connection_pointer db]
set sql {SELECT max(x) FROM t1}
set ::STMT [sqlite3_prepare_v2 $DB $sql -1 TAIL]
# The runsql() call on the second row of the first query will
# cause all $::STMT to hit an expired cookie. Prior to the fix
# for [b72787b1a7, the bad cookie would expire all statements, including
# the following compound SELECT, which would cause a fault when the
# second SELECT was reached. After the fix, the current statement
# continues to completion.
db eval {
SELECT CASE WHEN y=3 THEN y+100 WHEN y==4 THEN runsql()+200
ELSE 300+y END FROM t2
UNION ALL
SELECT * FROM t1;
}
} {103 202 305 306 1 2}
sqlite3_finalize $::STMT
finish_test
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