# 2007 May 8
#
# 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 contains tests to verify that the limits defined in
# sqlite source file limits.h are enforced.
#
# $Id: sqllimits1.test,v 1.2 2007/05/08 16:13:45 danielk1977 Exp $
set testdir [file dirname $argv0]
source $testdir/tester.tcl
#--------------------------------------------------------------------
# Test cases sqllimits-1.* test that the SQLITE_MAX_LENGTH limit
# is enforced.
#
do_test sqllimits-1.1 {
catchsql { SELECT randomblob(2147483647) }
} {1 {string or blob too big}}
# Large, but allowable, blob-size.
#
set ::LARGESIZE [expr $SQLITE_MAX_LENGTH - 1]
do_test sqllimits-1.2 {
catchsql { SELECT LENGTH(randomblob($::LARGESIZE)) }
} "0 $::LARGESIZE"
do_test sqllimits-1.3 {
catchsql { SELECT quote(randomblob($::LARGESIZE)) }
} {1 {string or blob too big}}
do_test sqllimits-1.4 {
set ::str [string repeat A 65537]
set ::rep [string repeat B 65537]
catchsql { SELECT replace($::str, 'A', $::rep) }
} {1 {string or blob too big}}
#--------------------------------------------------------------------
# Test cases sqllimits-2.* test that the SQLITE_MAX_SQL limit
# is enforced.
#
do_test sqllimits-2.1 {
set sql "SELECT 1 WHERE 1==1"
append sql [string repeat " AND 1==1" 200000]
catchsql $sql
} {1 {String or BLOB exceeded size limit}}
#--------------------------------------------------------------------
# Test cases sqllimits-3.* test that the limit set using the
# max_page_count pragma.
#
do_test sqllimits-3.1 {
execsql {
PRAGMA max_page_count = 1000;
}
} {1000}
do_test sqllimits-3.2 {
execsql {
CREATE TABLE trig (a INTEGER, b INTEGER);
}
# Set up a tree of triggers to fire when a row is inserted
# into table "trig".
#
# INSERT -> insert_b -> update_b -> insert_a -> update_a (chain 1)
# -> update_a -> insert_a -> update_b (chain 2)
# -> insert_a -> update_b -> insert_b -> update_a (chain 3)
# -> update_a -> insert_b -> update_b (chain 4)
#
# Table starts with N rows.
#
# Chain 1: insert_b (update N rows)
# -> update_b (insert 1 rows)
# -> insert_a (update N rows)
# -> update_a (insert 1 rows)
#
# chains 2, 3 and 4 are similar. Each inserts more than N^2 rows, where
# N is the number of rows at the conclusion of the previous chain.
#
# Therefore, a single insert adds (N^16 plus some) rows to the database.
# A really long loop...
#
execsql {
CREATE TRIGGER update_b BEFORE UPDATE ON trig
FOR EACH ROW BEGIN
INSERT INTO trig VALUES (65, 'update_b');
END;
CREATE TRIGGER update_a AFTER UPDATE ON trig
FOR EACH ROW BEGIN
INSERT INTO trig VALUES (65, 'update_a');
END;
CREATE TRIGGER insert_b BEFORE INSERT ON trig
FOR EACH ROW BEGIN
UPDATE trig SET a = 1;
END;
CREATE TRIGGER insert_a AFTER INSERT ON trig
FOR EACH ROW BEGIN
UPDATE trig SET a = 1;
END;
}
} {}
do_test sqllimits1-3.3 {
execsql {
INSERT INTO trig VALUES (1,1);
}
} {}
do_test sqllimits1-3.4 {
execsql {
SELECT COUNT(*) FROM trig;
}
} {7}
# This tries to insert so many rows it fills up the database (limited
# to 1MB, so not that noteworthy an achievement).
#
do_test sqllimits1-3.5 {
catchsql {
INSERT INTO trig VALUES (1,10);
}
} {1 {database or disk is full}}
do_test sqllimits1-3.6 {
catchsql {
SELECT COUNT(*) FROM trig;
}
} {0 7}
finish_test