121 lines
3.5 KiB
Plaintext
121 lines
3.5 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 1.5 2002/08/13 23:02:58 drh Exp $
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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# Build some test data
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#
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set fd [open data1.txt w]
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for {set i 1} {$i<=32} {incr i} {
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for {set j 0} {pow(2,$j)<$i} {incr j} {}
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puts $fd "[expr {32-$i}]\t[expr {10-$j}]"
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}
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close $fd
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execsql {
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CREATE TABLE t1(x int, y int);
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COPY t1 FROM 'data1.txt'
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}
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file delete data1.txt
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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 {
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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-1.3 {
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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 {
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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-1.5 {
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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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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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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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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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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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do_test limit-4.1 {
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execsql {
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BEGIN;
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CREATE TABLE t3 AS 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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} {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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finish_test
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