447 lines
11 KiB
Plaintext
447 lines
11 KiB
Plaintext
# 2001 November 6
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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
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# focus of this file is testing the LIMIT ... OFFSET ... clause
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# of SELECT statements.
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#
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# $Id: limit.test,v 1.29 2006/04/26 17:39:34 drh Exp $
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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# Build some test data
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#
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execsql {
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CREATE TABLE t1(x int, y int);
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BEGIN;
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}
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for {set i 1} {$i<=32} {incr i} {
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for {set j 0} {pow(2,$j)<$i} {incr j} {}
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execsql "INSERT INTO t1 VALUES([expr {32-$i}],[expr {10-$j}])"
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}
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execsql {
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COMMIT;
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}
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do_test limit-1.0 {
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execsql {SELECT count(*) FROM t1}
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} {32}
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do_test limit-1.1 {
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execsql {SELECT count(*) FROM t1 LIMIT 5}
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} {32}
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do_test limit-1.2.1 {
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execsql {SELECT x FROM t1 ORDER BY x LIMIT 5}
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} {0 1 2 3 4}
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do_test limit-1.2.2 {
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execsql {SELECT x FROM t1 ORDER BY x LIMIT 5 OFFSET 2}
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} {2 3 4 5 6}
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do_test limit-1.2.3 {
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execsql {SELECT x FROM t1 ORDER BY x+1 LIMIT 5 OFFSET -2}
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} {0 1 2 3 4}
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do_test limit-1.2.4 {
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execsql {SELECT x FROM t1 ORDER BY x+1 LIMIT 2, -5}
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} {2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31}
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do_test limit-1.2.5 {
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execsql {SELECT x FROM t1 ORDER BY x+1 LIMIT -2, 5}
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} {0 1 2 3 4}
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do_test limit-1.2.6 {
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execsql {SELECT x FROM t1 ORDER BY x+1 LIMIT -2, -5}
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} {0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31}
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do_test limit-1.2.7 {
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execsql {SELECT x FROM t1 ORDER BY x LIMIT 2, 5}
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} {2 3 4 5 6}
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do_test limit-1.3 {
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execsql {SELECT x FROM t1 ORDER BY x LIMIT 5 OFFSET 5}
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} {5 6 7 8 9}
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do_test limit-1.4.1 {
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execsql {SELECT x FROM t1 ORDER BY x LIMIT 50 OFFSET 30}
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} {30 31}
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do_test limit-1.4.2 {
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execsql {SELECT x FROM t1 ORDER BY x LIMIT 30, 50}
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} {30 31}
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do_test limit-1.5 {
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execsql {SELECT x FROM t1 ORDER BY x LIMIT 50 OFFSET 50}
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} {}
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do_test limit-1.6 {
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execsql {SELECT * FROM t1 AS a, t1 AS b ORDER BY a.x, b.x LIMIT 5}
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} {0 5 0 5 0 5 1 5 0 5 2 5 0 5 3 5 0 5 4 5}
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do_test limit-1.7 {
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execsql {SELECT * FROM t1 AS a, t1 AS b ORDER BY a.x, b.x LIMIT 5 OFFSET 32}
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} {1 5 0 5 1 5 1 5 1 5 2 5 1 5 3 5 1 5 4 5}
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ifcapable {view && subquery} {
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do_test limit-2.1 {
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execsql {
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CREATE VIEW v1 AS SELECT * FROM t1 LIMIT 2;
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SELECT count(*) FROM (SELECT * FROM v1);
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}
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} 2
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} ;# ifcapable view
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do_test limit-2.2 {
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execsql {
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CREATE TABLE t2 AS SELECT * FROM t1 LIMIT 2;
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SELECT count(*) FROM t2;
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}
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} 2
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ifcapable subquery {
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do_test limit-2.3 {
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execsql {
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SELECT count(*) FROM t1 WHERE rowid IN (SELECT rowid FROM t1 LIMIT 2);
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}
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} 2
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}
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ifcapable subquery {
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do_test limit-3.1 {
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execsql {
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SELECT z FROM (SELECT y*10+x AS z FROM t1 ORDER BY x LIMIT 10)
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ORDER BY z LIMIT 5;
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}
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} {50 51 52 53 54}
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}
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do_test limit-4.1 {
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ifcapable subquery {
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execsql {
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BEGIN;
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CREATE TABLE t3(x);
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INSERT INTO t3 SELECT x FROM t1 ORDER BY x LIMIT 10 OFFSET 1;
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INSERT INTO t3 SELECT x+(SELECT max(x) FROM t3) FROM t3;
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INSERT INTO t3 SELECT x+(SELECT max(x) FROM t3) FROM t3;
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INSERT INTO t3 SELECT x+(SELECT max(x) FROM t3) FROM t3;
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INSERT INTO t3 SELECT x+(SELECT max(x) FROM t3) FROM t3;
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INSERT INTO t3 SELECT x+(SELECT max(x) FROM t3) FROM t3;
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INSERT INTO t3 SELECT x+(SELECT max(x) FROM t3) FROM t3;
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INSERT INTO t3 SELECT x+(SELECT max(x) FROM t3) FROM t3;
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INSERT INTO t3 SELECT x+(SELECT max(x) FROM t3) FROM t3;
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INSERT INTO t3 SELECT x+(SELECT max(x) FROM t3) FROM t3;
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INSERT INTO t3 SELECT x+(SELECT max(x) FROM t3) FROM t3;
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END;
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SELECT count(*) FROM t3;
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}
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} else {
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execsql {
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BEGIN;
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CREATE TABLE t3(x);
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INSERT INTO t3 SELECT x FROM t1 ORDER BY x LIMIT 10 OFFSET 1;
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}
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for {set i 0} {$i<10} {incr i} {
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set max_x_t3 [execsql {SELECT max(x) FROM t3}]
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execsql "INSERT INTO t3 SELECT x+$max_x_t3 FROM t3;"
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}
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execsql {
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END;
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SELECT count(*) FROM t3;
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}
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}
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} {10240}
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do_test limit-4.2 {
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execsql {
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SELECT x FROM t3 LIMIT 2 OFFSET 10000
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}
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} {10001 10002}
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do_test limit-4.3 {
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execsql {
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CREATE TABLE t4 AS SELECT x,
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'abcdefghijklmnopqrstuvwyxz ABCDEFGHIJKLMNOPQRSTUVWYXZ' || x ||
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'abcdefghijklmnopqrstuvwyxz ABCDEFGHIJKLMNOPQRSTUVWYXZ' || x ||
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'abcdefghijklmnopqrstuvwyxz ABCDEFGHIJKLMNOPQRSTUVWYXZ' || x ||
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'abcdefghijklmnopqrstuvwyxz ABCDEFGHIJKLMNOPQRSTUVWYXZ' || x ||
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'abcdefghijklmnopqrstuvwyxz ABCDEFGHIJKLMNOPQRSTUVWYXZ' || x AS y
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FROM t3 LIMIT 1000;
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SELECT x FROM t4 ORDER BY y DESC LIMIT 1 OFFSET 999;
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}
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} {1000}
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do_test limit-5.1 {
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execsql {
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CREATE TABLE t5(x,y);
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INSERT INTO t5 SELECT x-y, x+y FROM t1 WHERE x BETWEEN 10 AND 15
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ORDER BY x LIMIT 2;
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SELECT * FROM t5 ORDER BY x;
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}
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} {5 15 6 16}
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do_test limit-5.2 {
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execsql {
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DELETE FROM t5;
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INSERT INTO t5 SELECT x-y, x+y FROM t1 WHERE x BETWEEN 10 AND 15
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ORDER BY x DESC LIMIT 2;
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SELECT * FROM t5 ORDER BY x;
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}
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} {9 19 10 20}
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do_test limit-5.3 {
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execsql {
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DELETE FROM t5;
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INSERT INTO t5 SELECT x-y, x+y FROM t1 WHERE x ORDER BY x DESC LIMIT 31;
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SELECT * FROM t5 ORDER BY x LIMIT 2;
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}
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} {-4 6 -3 7}
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do_test limit-5.4 {
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execsql {
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SELECT * FROM t5 ORDER BY x DESC, y DESC LIMIT 2;
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}
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} {21 41 21 39}
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do_test limit-5.5 {
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execsql {
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DELETE FROM t5;
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INSERT INTO t5 SELECT a.x*100+b.x, a.y*100+b.y FROM t1 AS a, t1 AS b
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ORDER BY 1, 2 LIMIT 1000;
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SELECT count(*), sum(x), sum(y), min(x), max(x), min(y), max(y) FROM t5;
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}
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} {1000 1528204 593161 0 3107 505 1005}
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# There is some contraversy about whether LIMIT 0 should be the same as
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# no limit at all or if LIMIT 0 should result in zero output rows.
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#
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do_test limit-6.1 {
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execsql {
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BEGIN;
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CREATE TABLE t6(a);
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INSERT INTO t6 VALUES(1);
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INSERT INTO t6 VALUES(2);
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INSERT INTO t6 SELECT a+2 FROM t6;
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COMMIT;
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SELECT * FROM t6;
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}
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} {1 2 3 4}
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do_test limit-6.2 {
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execsql {
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SELECT * FROM t6 LIMIT -1 OFFSET -1;
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}
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} {1 2 3 4}
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do_test limit-6.3 {
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execsql {
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SELECT * FROM t6 LIMIT 2 OFFSET -123;
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}
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} {1 2}
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do_test limit-6.4 {
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execsql {
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SELECT * FROM t6 LIMIT -432 OFFSET 2;
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}
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} {3 4}
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do_test limit-6.5 {
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execsql {
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SELECT * FROM t6 LIMIT -1
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}
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} {1 2 3 4}
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do_test limit-6.6 {
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execsql {
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SELECT * FROM t6 LIMIT -1 OFFSET 1
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}
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} {2 3 4}
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do_test limit-6.7 {
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execsql {
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SELECT * FROM t6 LIMIT 0
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}
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} {}
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do_test limit-6.8 {
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execsql {
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SELECT * FROM t6 LIMIT 0 OFFSET 1
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}
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} {}
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# Make sure LIMIT works well with compound SELECT statements.
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# Ticket #393
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#
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ifcapable compound {
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do_test limit-7.1.1 {
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catchsql {
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SELECT x FROM t2 LIMIT 5 UNION ALL SELECT a FROM t6;
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}
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} {1 {LIMIT clause should come after UNION ALL not before}}
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do_test limit-7.1.2 {
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catchsql {
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SELECT x FROM t2 LIMIT 5 UNION SELECT a FROM t6;
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}
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} {1 {LIMIT clause should come after UNION not before}}
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do_test limit-7.1.3 {
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catchsql {
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SELECT x FROM t2 LIMIT 5 EXCEPT SELECT a FROM t6 LIMIT 3;
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}
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} {1 {LIMIT clause should come after EXCEPT not before}}
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do_test limit-7.1.4 {
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catchsql {
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SELECT x FROM t2 LIMIT 0,5 INTERSECT SELECT a FROM t6;
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}
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} {1 {LIMIT clause should come after INTERSECT not before}}
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do_test limit-7.2 {
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execsql {
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SELECT x FROM t2 UNION ALL SELECT a FROM t6 LIMIT 5;
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}
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} {31 30 1 2 3}
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do_test limit-7.3 {
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execsql {
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SELECT x FROM t2 UNION ALL SELECT a FROM t6 LIMIT 3 OFFSET 1;
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}
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} {30 1 2}
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do_test limit-7.4 {
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execsql {
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SELECT x FROM t2 UNION ALL SELECT a FROM t6 ORDER BY 1 LIMIT 3 OFFSET 1;
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}
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} {2 3 4}
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do_test limit-7.5 {
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execsql {
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SELECT x FROM t2 UNION SELECT x+2 FROM t2 LIMIT 2 OFFSET 1;
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}
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} {31 32}
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do_test limit-7.6 {
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execsql {
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SELECT x FROM t2 UNION SELECT x+2 FROM t2 ORDER BY 1 DESC LIMIT 2 OFFSET 1;
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}
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} {32 31}
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do_test limit-7.7 {
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execsql {
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SELECT a+9 FROM t6 EXCEPT SELECT y FROM t2 LIMIT 2;
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}
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} {11 12}
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do_test limit-7.8 {
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execsql {
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SELECT a+9 FROM t6 EXCEPT SELECT y FROM t2 ORDER BY 1 DESC LIMIT 2;
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}
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} {13 12}
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do_test limit-7.9 {
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execsql {
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SELECT a+26 FROM t6 INTERSECT SELECT x FROM t2 LIMIT 1;
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}
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} {30}
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do_test limit-7.10 {
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execsql {
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SELECT a+27 FROM t6 INTERSECT SELECT x FROM t2 LIMIT 1;
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}
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} {30}
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do_test limit-7.11 {
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execsql {
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SELECT a+27 FROM t6 INTERSECT SELECT x FROM t2 LIMIT 1 OFFSET 1;
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}
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} {31}
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do_test limit-7.12 {
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execsql {
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SELECT a+27 FROM t6 INTERSECT SELECT x FROM t2
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ORDER BY 1 DESC LIMIT 1 OFFSET 1;
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}
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} {30}
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} ;# ifcapable compound
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# Tests for limit in conjunction with distinct. The distinct should
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# occur before both the limit and the offset. Ticket #749.
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#
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do_test limit-8.1 {
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execsql {
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SELECT DISTINCT cast(round(x/100) as integer) FROM t3 LIMIT 5;
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}
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} {0 1 2 3 4}
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do_test limit-8.2 {
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execsql {
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SELECT DISTINCT cast(round(x/100) as integer) FROM t3 LIMIT 5 OFFSET 5;
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}
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} {5 6 7 8 9}
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do_test limit-8.3 {
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execsql {
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SELECT DISTINCT cast(round(x/100) as integer) FROM t3 LIMIT 5 OFFSET 25;
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}
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} {25 26 27 28 29}
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# Make sure limits on multiple subqueries work correctly.
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# Ticket #1035
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#
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ifcapable subquery {
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do_test limit-9.1 {
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execsql {
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SELECT * FROM (SELECT * FROM t6 LIMIT 3);
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}
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} {1 2 3}
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}
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do_test limit-9.2.1 {
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execsql {
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CREATE TABLE t7 AS SELECT * FROM t6;
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}
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} {}
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ifcapable subquery {
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do_test limit-9.2.2 {
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execsql {
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SELECT * FROM (SELECT * FROM t7 LIMIT 3);
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}
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} {1 2 3}
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}
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ifcapable compound {
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ifcapable subquery {
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do_test limit-9.3 {
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execsql {
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SELECT * FROM (SELECT * FROM t6 LIMIT 3)
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UNION
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SELECT * FROM (SELECT * FROM t7 LIMIT 3)
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ORDER BY 1
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}
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} {1 2 3}
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do_test limit-9.4 {
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execsql {
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SELECT * FROM (SELECT * FROM t6 LIMIT 3)
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UNION
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SELECT * FROM (SELECT * FROM t7 LIMIT 3)
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ORDER BY 1
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LIMIT 2
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}
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} {1 2}
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}
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do_test limit-9.5 {
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catchsql {
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SELECT * FROM t6 LIMIT 3
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UNION
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SELECT * FROM t7 LIMIT 3
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}
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} {1 {LIMIT clause should come after UNION not before}}
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}
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# Test LIMIT and OFFSET using SQL variables.
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do_test limit-10.1 {
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set limit 10
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db eval {
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SELECT x FROM t1 LIMIT :limit;
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}
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} {31 30 29 28 27 26 25 24 23 22}
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do_test limit-10.2 {
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set limit 5
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set offset 5
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db eval {
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SELECT x FROM t1 LIMIT :limit OFFSET :offset;
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}
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} {26 25 24 23 22}
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do_test limit-10.3 {
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set limit -1
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db eval {
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SELECT x FROM t1 WHERE x<10 LIMIT :limit;
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}
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} {9 8 7 6 5 4 3 2 1 0}
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do_test limit-10.4 {
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set limit 1.5
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set rc [catch {
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db eval {
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SELECT x FROM t1 WHERE x<10 LIMIT :limit;
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} } msg]
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list $rc $msg
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} {1 {datatype mismatch}}
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do_test limit-10.5 {
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set limit "hello world"
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set rc [catch {
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db eval {
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SELECT x FROM t1 WHERE x<10 LIMIT :limit;
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} } msg]
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list $rc $msg
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} {1 {datatype mismatch}}
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do_test limit-11.1 {
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db eval {
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SELECT x FROM (SELECT x FROM t1 ORDER BY x LIMIT 0) ORDER BY x
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}
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} {}
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finish_test
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