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# 2008 October 6
#
# 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. The
# focus of this file is testing the LIMIT ... OFFSET ... clause
# of UPDATE and DELETE statements.
#
# $Id: wherelimit.test,v 1.2 2008/10/10 18:25:46 shane Exp $
set testdir [file dirname $argv0]
source $testdir/tester.tcl
proc create_test_data {size} {
# Build some test data
#
execsql {
DROP TABLE IF EXISTS t1;
CREATE TABLE t1(x int, y int);
BEGIN;
}
for {set i 1} {$i<=$size} {incr i} {
for {set j 1} {$j<=$size} {incr j} {
execsql "INSERT INTO t1 VALUES([expr {$i}],[expr {$j}])"
}
}
execsql {
COMMIT;
}
return {}
}
ifcapable {update_delete_limit} {
# check syntax error support
do_test wherelimit-0.1 {
catchsql {DELETE FROM t1 ORDER BY x}
} {1 {ORDER BY without LIMIT on DELETE}}
do_test wherelimit-0.2 {
catchsql {DELETE FROM t1 WHERE x=1 ORDER BY x}
} {1 {ORDER BY without LIMIT on DELETE}}
do_test wherelimit-0.3 {
catchsql {UPDATE t1 SET y=1 WHERE x=1 ORDER BY x}
} {1 {ORDER BY without LIMIT on UPDATE}}
# no AS on table sources
do_test wherelimit-0.4 {
catchsql {DELETE FROM t1 AS a WHERE x=1}
} {1 {near "AS": syntax error}}
do_test wherelimit-0.5 {
catchsql {UPDATE t1 AS a SET y=1 WHERE x=1}
} {1 {near "AS": syntax error}}
# OFFSET w/o LIMIT
do_test wherelimit-0.6 {
catchsql {DELETE FROM t1 WHERE x=1 OFFSET 2}
} {1 {near "OFFSET": syntax error}}
do_test wherelimit-0.7 {
catchsql {UPDATE t1 SET y=1 WHERE x=1 OFFSET 2}
} {1 {near "OFFSET": syntax error}}
# check deletes w/o where clauses but with limit/offsets
create_test_data 5
do_test wherelimit-1.0 {
execsql {SELECT count(*) FROM t1}
} {25}
do_test wherelimit-1.1 {
execsql {DELETE FROM t1}
execsql {SELECT count(*) FROM t1}
} {0}
create_test_data 5
do_test wherelimit-1.2 {
execsql {DELETE FROM t1 LIMIT 5}
execsql {SELECT count(*) FROM t1}
} {20}
do_test wherelimit-1.3 {
# limit 5
execsql {DELETE FROM t1 ORDER BY x LIMIT 5}
execsql {SELECT count(*) FROM t1}
} {15}
do_test wherelimit-1.4 {
# limit 5, offset 2
execsql {DELETE FROM t1 ORDER BY x LIMIT 5 OFFSET 2}
execsql {SELECT count(*) FROM t1}
} {10}
do_test wherelimit-1.5 {
# limit 5, offset -2
execsql {DELETE FROM t1 ORDER BY x LIMIT 5 OFFSET -2}
execsql {SELECT count(*) FROM t1}
} {5}
do_test wherelimit-1.6 {
# limit -5 (no limit), offset 2
execsql {DELETE FROM t1 ORDER BY x LIMIT 2, -5}
execsql {SELECT count(*) FROM t1}
} {2}
do_test wherelimit-1.7 {
# limit 5, offset -2 (no offset)
execsql {DELETE FROM t1 ORDER BY x LIMIT -2, 5}
execsql {SELECT count(*) FROM t1}
} {0}
create_test_data 5
do_test wherelimit-1.8 {
# limit -5 (no limit), offset -2 (no offset)
execsql {DELETE FROM t1 ORDER BY x LIMIT -2, -5}
execsql {SELECT count(*) FROM t1}
} {0}
create_test_data 3
do_test wherelimit-1.9 {
# limit 5, offset 2
execsql {DELETE FROM t1 ORDER BY x LIMIT 2, 5}
execsql {SELECT count(*) FROM t1}
} {4}
do_test wherelimit-1.10 {
# limit 5, offset 5
execsql {DELETE FROM t1 ORDER BY x LIMIT 5 OFFSET 5}
execsql {SELECT count(*) FROM t1}
} {4}
do_test wherelimit-1.11 {
# limit 50, offset 30
execsql {DELETE FROM t1 ORDER BY x LIMIT 50 OFFSET 30}
execsql {SELECT count(*) FROM t1}
} {4}
do_test wherelimit-1.12 {
# limit 50, offset 30
execsql {DELETE FROM t1 ORDER BY x LIMIT 30, 50}
execsql {SELECT count(*) FROM t1}
} {4}
do_test wherelimit-1.13 {
execsql {DELETE FROM t1 ORDER BY x LIMIT 50 OFFSET 50}
execsql {SELECT count(*) FROM t1}
} {4}
create_test_data 6
do_test wherelimit-2.0 {
execsql {SELECT count(*) FROM t1}
} {36}
do_test wherelimit-2.1 {
execsql {DELETE FROM t1 WHERE x=1}
execsql {SELECT count(*) FROM t1}
} {30}
create_test_data 6
do_test wherelimit-2.2 {
execsql {DELETE FROM t1 WHERE x=1 LIMIT 5}
execsql {SELECT count(*) FROM t1}
} {31}
do_test wherelimit-2.3 {
# limit 5
execsql {DELETE FROM t1 WHERE x=1 ORDER BY x LIMIT 5}
execsql {SELECT count(*) FROM t1}
} {30}
do_test wherelimit-2.4 {
# limit 5, offset 2
execsql {DELETE FROM t1 WHERE x=2 ORDER BY x LIMIT 5 OFFSET 2}
execsql {SELECT count(*) FROM t1}
} {26}
do_test wherelimit-2.5 {
# limit 5, offset -2
execsql {DELETE FROM t1 WHERE x=2 ORDER BY x LIMIT 5 OFFSET -2}
execsql {SELECT count(*) FROM t1}
} {24}
do_test wherelimit-2.6 {
# limit -5 (no limit), offset 2
execsql {DELETE FROM t1 WHERE x=3 ORDER BY x LIMIT 2, -5}
execsql {SELECT count(*) FROM t1}
} {20}
do_test wherelimit-2.7 {
# limit 5, offset -2 (no offset)
execsql {DELETE FROM t1 WHERE x=3 ORDER BY x LIMIT -2, 5}
execsql {SELECT count(*) FROM t1}
} {18}
do_test wherelimit-2.8 {
# limit -5 (no limit), offset -2 (no offset)
execsql {DELETE FROM t1 WHERE x=4 ORDER BY x LIMIT -2, -5}
execsql {SELECT count(*) FROM t1}
} {12}
create_test_data 6
do_test wherelimit-2.9 {
# limit 5, offset 2
execsql {DELETE FROM t1 WHERE x=5 ORDER BY x LIMIT 2, 5}
execsql {SELECT count(*) FROM t1}
} {32}
do_test wherelimit-2.10 {
# limit 5, offset 5
execsql {DELETE FROM t1 WHERE x=6 ORDER BY x LIMIT 5 OFFSET 5}
execsql {SELECT count(*) FROM t1}
} {31}
do_test wherelimit-2.11 {
# limit 50, offset 30
execsql {DELETE FROM t1 WHERE x=1 ORDER BY x LIMIT 50 OFFSET 30}
execsql {SELECT count(*) FROM t1}
} {31}
do_test wherelimit-2.12 {
# limit 50, offset 30
execsql {DELETE FROM t1 WHERE x=2 ORDER BY x LIMIT 30, 50}
execsql {SELECT count(*) FROM t1}
} {31}
do_test wherelimit-2.13 {
execsql {DELETE FROM t1 WHERE x=3 ORDER BY x LIMIT 50 OFFSET 50}
execsql {SELECT count(*) FROM t1}
} {31}
create_test_data 6
do_test wherelimit-3.0 {
execsql {SELECT count(*) FROM t1}
} {36}
do_test wherelimit-3.1 {
execsql {UPDATE t1 SET y=1 WHERE x=1}
execsql {SELECT count(*) FROM t1 WHERE y=1}
} {11}
create_test_data 6
do_test wherelimit-3.2 {
execsql {UPDATE t1 SET y=1 WHERE x=1 LIMIT 5}
execsql {SELECT count(*) FROM t1 WHERE y=1}
} {10}
do_test wherelimit-3.3 {
# limit 5
execsql {UPDATE t1 SET y=2 WHERE x=2 ORDER BY x LIMIT 5}
execsql {SELECT count(*) FROM t1 WHERE y=2}
} {9}
create_test_data 6
do_test wherelimit-3.4 {
# limit 5, offset 2
execsql {UPDATE t1 SET y=2 WHERE x=2 ORDER BY x LIMIT 5 OFFSET 2}
execsql {SELECT count(*) FROM t1 WHERE y=1}
} {6}
do_test wherelimit-3.5 {
# limit 5, offset -2
execsql {UPDATE t1 SET y=2 WHERE x=2 ORDER BY x LIMIT 5 OFFSET -2}
execsql {SELECT count(*) FROM t1 WHERE y=1}
} {5}
do_test wherelimit-3.6 {
# limit -5 (no limit), offset 2
execsql {UPDATE t1 SET y=3 WHERE x=3 ORDER BY x LIMIT 2, -5}
execsql {SELECT count(*) FROM t1 WHERE y=3}
} {8}
do_test wherelimit-3.7 {
# limit 5, offset -2 (no offset)
execsql {UPDATE t1 SET y=3 WHERE x=3 ORDER BY x LIMIT -2, 5}
execsql {SELECT count(*) FROM t1 WHERE y=3}
} {10}
do_test wherelimit-3.8 {
# limit -5 (no limit), offset -2 (no offset)
execsql {UPDATE t1 SET y=4 WHERE x=4 ORDER BY x LIMIT -2, -5}
execsql {SELECT count(*) FROM t1 WHERE y=4}
} {9}
create_test_data 6
do_test wherelimit-3.9 {
# limit 5, offset 2
execsql {UPDATE t1 SET y=4 WHERE x=5 ORDER BY x LIMIT 2, 5}
execsql {SELECT count(*) FROM t1 WHERE y=4}
} {9}
do_test wherelimit-3.10 {
# limit 5, offset 5
execsql {UPDATE t1 SET y=4 WHERE x=6 ORDER BY x LIMIT 5 OFFSET 5}
execsql {SELECT count(*) FROM t1 WHERE y=1}
} {6}
do_test wherelimit-3.11 {
# limit 50, offset 30
execsql {UPDATE t1 SET y=1 WHERE x=1 ORDER BY x LIMIT 50 OFFSET 30}
execsql {SELECT count(*) FROM t1 WHERE y=1}
} {6}
do_test wherelimit-3.12 {
# limit 50, offset 30
execsql {UPDATE t1 SET y=1 WHERE x=2 ORDER BY x LIMIT 30, 50}
execsql {SELECT count(*) FROM t1 WHERE y=1}
} {6}
do_test wherelimit-3.13 {
execsql {UPDATE t1 SET y=1 WHERE x=3 ORDER BY x LIMIT 50 OFFSET 50}
execsql {SELECT count(*) FROM t1 WHERE y=1}
} {6}
}
finish_test
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