310 lines
6.7 KiB
Plaintext
310 lines
6.7 KiB
Plaintext
# 2001 September 15
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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 SELECT statements that contain
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# aggregate min() and max() functions and which are handled as
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# as a special case.
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#
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# $Id: minmax.test,v 1.10 2004/06/24 00:20:05 danielk1977 Exp $
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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do_test minmax-1.0 {
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execsql {
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BEGIN;
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CREATE TABLE t1(x, y);
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INSERT INTO t1 VALUES(1,1);
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INSERT INTO t1 VALUES(2,2);
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INSERT INTO t1 VALUES(3,2);
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INSERT INTO t1 VALUES(4,3);
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INSERT INTO t1 VALUES(5,3);
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INSERT INTO t1 VALUES(6,3);
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INSERT INTO t1 VALUES(7,3);
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INSERT INTO t1 VALUES(8,4);
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INSERT INTO t1 VALUES(9,4);
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INSERT INTO t1 VALUES(10,4);
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INSERT INTO t1 VALUES(11,4);
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INSERT INTO t1 VALUES(12,4);
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INSERT INTO t1 VALUES(13,4);
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INSERT INTO t1 VALUES(14,4);
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INSERT INTO t1 VALUES(15,4);
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INSERT INTO t1 VALUES(16,5);
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INSERT INTO t1 VALUES(17,5);
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INSERT INTO t1 VALUES(18,5);
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INSERT INTO t1 VALUES(19,5);
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INSERT INTO t1 VALUES(20,5);
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COMMIT;
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SELECT DISTINCT y FROM t1 ORDER BY y;
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}
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} {1 2 3 4 5}
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do_test minmax-1.1 {
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set sqlite_search_count 0
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execsql {SELECT min(x) FROM t1}
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} {1}
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do_test minmax-1.2 {
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set sqlite_search_count
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} {19}
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do_test minmax-1.3 {
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set sqlite_search_count 0
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execsql {SELECT max(x) FROM t1}
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} {20}
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do_test minmax-1.4 {
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set sqlite_search_count
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} {19}
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do_test minmax-1.5 {
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execsql {CREATE INDEX t1i1 ON t1(x)}
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set sqlite_search_count 0
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execsql {SELECT min(x) FROM t1}
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} {1}
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do_test minmax-1.6 {
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set sqlite_search_count
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} {1}
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do_test minmax-1.7 {
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set sqlite_search_count 0
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execsql {SELECT max(x) FROM t1}
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} {20}
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do_test minmax-1.8 {
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set sqlite_search_count
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} {1}
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do_test minmax-1.9 {
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set sqlite_search_count 0
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execsql {SELECT max(y) FROM t1}
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} {5}
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do_test minmax-1.10 {
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set sqlite_search_count
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} {19}
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do_test minmax-2.0 {
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execsql {
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CREATE TABLE t2(a INTEGER PRIMARY KEY, b);
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INSERT INTO t2 SELECT * FROM t1;
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}
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set sqlite_search_count 0
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execsql {SELECT min(a) FROM t2}
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} {1}
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do_test minmax-2.1 {
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set sqlite_search_count
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} {0}
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do_test minmax-2.2 {
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set sqlite_search_count 0
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execsql {SELECT max(a) FROM t2}
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} {20}
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do_test minmax-2.3 {
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set sqlite_search_count
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} {0}
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do_test minmax-3.0 {
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execsql {INSERT INTO t2 VALUES((SELECT max(a) FROM t2)+1,999)}
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set sqlite_search_count 0
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execsql {SELECT max(a) FROM t2}
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} {21}
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do_test minmax-3.1 {
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set sqlite_search_count
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} {0}
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do_test minmax-3.2 {
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execsql {INSERT INTO t2 VALUES((SELECT max(a) FROM t2)+1,999)}
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set sqlite_search_count 0
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execsql {
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SELECT b FROM t2 WHERE a=(SELECT max(a) FROM t2)
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}
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} {999}
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do_test minmax-3.3 {
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set sqlite_search_count
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} {0}
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do_test minmax-4.1 {
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execsql {
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SELECT coalesce(min(x+0),-1), coalesce(max(x+0),-1) FROM
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(SELECT * FROM t1 UNION SELECT NULL as 'x', NULL as 'y')
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}
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} {-1 20}
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do_test minmax-4.2 {
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execsql {
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SELECT y, sum(x) FROM
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(SELECT null, y+1 FROM t1 UNION SELECT * FROM t1)
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GROUP BY y ORDER BY y;
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}
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} {1 1 2 5 3 22 4 92 5 90 6 0}
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do_test minmax-4.3 {
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execsql {
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SELECT y, count(x), count(*) FROM
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(SELECT null, y+1 FROM t1 UNION SELECT * FROM t1)
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GROUP BY y ORDER BY y;
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}
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} {1 1 1 2 2 3 3 4 5 4 8 9 5 5 6 6 0 1}
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# Make sure the min(x) and max(x) optimizations work on empty tables
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# including empty tables with indices. Ticket #296.
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#
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do_test minmax-5.1 {
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execsql {
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CREATE TABLE t3(x INTEGER UNIQUE NOT NULL);
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SELECT coalesce(min(x),999) FROM t3;
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}
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} {999}
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do_test minmax-5.2 {
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execsql {
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SELECT coalesce(min(rowid),999) FROM t3;
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}
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} {999}
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do_test minmax-5.3 {
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execsql {
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SELECT coalesce(max(x),999) FROM t3;
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}
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} {999}
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do_test minmax-5.4 {
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execsql {
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SELECT coalesce(max(rowid),999) FROM t3;
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}
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} {999}
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do_test minmax-5.5 {
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execsql {
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SELECT coalesce(max(rowid),999) FROM t3 WHERE rowid<25;
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}
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} {999}
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# Make sure the min(x) and max(x) optimizations work when there
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# is a LIMIT clause. Ticket #396.
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#
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do_test minmax-6.1 {
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execsql {
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SELECT min(a) FROM t2 LIMIT 1
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}
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} {1}
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do_test minmax-6.2 {
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execsql {
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SELECT max(a) FROM t2 LIMIT 3
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}
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} {22}
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do_test minmax-6.3 {
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execsql {
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SELECT min(a) FROM t2 LIMIT 0,100
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}
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} {1}
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do_test minmax-6.4 {
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execsql {
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SELECT max(a) FROM t2 LIMIT 1,100
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}
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} {}
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do_test minmax-6.5 {
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execsql {
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SELECT min(x) FROM t3 LIMIT 1
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}
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} {{}}
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do_test minmax-6.6 {
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execsql {
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SELECT max(x) FROM t3 LIMIT 0
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}
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} {}
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do_test minmax-6.7 {
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execsql {
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SELECT max(a) FROM t2 LIMIT 0
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}
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} {}
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# Make sure the max(x) and min(x) optimizations work for nested
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# queries. Ticket #587.
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#
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do_test minmax-7.1 {
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execsql {
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SELECT max(x) FROM t1;
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}
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} 20
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do_test minmax-7.2 {
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execsql {
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SELECT * FROM (SELECT max(x) FROM t1);
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}
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} 20
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do_test minmax-7.3 {
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execsql {
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SELECT min(x) FROM t1;
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}
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} 1
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do_test minmax-7.4 {
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execsql {
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SELECT * FROM (SELECT min(x) FROM t1);
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}
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} 1
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# Make sure min(x) and max(x) work correctly when the datatype is
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# TEXT instead of NUMERIC. Ticket #623.
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#
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do_test minmax-8.1 {
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execsql {
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CREATE TABLE t4(a TEXT);
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INSERT INTO t4 VALUES('1234');
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INSERT INTO t4 VALUES('234');
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INSERT INTO t4 VALUES('34');
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SELECT min(a), max(a) FROM t4;
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}
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} {1234 34}
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do_test minmax-8.2 {
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execsql {
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CREATE TABLE t5(a INTEGER);
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INSERT INTO t5 VALUES('1234');
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INSERT INTO t5 VALUES('234');
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INSERT INTO t5 VALUES('34');
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SELECT min(a), max(a) FROM t5;
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}
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} {34 1234}
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# Ticket #658: Test the min()/max() optimization when the FROM clause
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# is a subquery.
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#
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do_test minmax-9.1 {
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execsql {
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SELECT max(rowid) FROM (
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SELECT max(rowid) FROM t4 UNION SELECT max(rowid) FROM t5
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)
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}
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} {1}
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do_test minmax-9.2 {
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execsql {
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SELECT max(rowid) FROM (
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SELECT max(rowid) FROM t4 EXCEPT SELECT max(rowid) FROM t5
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)
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}
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} {{}}
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# If there is a NULL in an aggregate max(), ignore it. If a NULL
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# occurs in an aggregate min(), then the result will be NULL because
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# NULL compares less than all other values.
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#
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do_test minmax-10.1 {
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execsql {
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CREATE TABLE t6(x);
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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 VALUES(NULL);
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SELECT coalesce(min(x),-1) FROM t6;
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}
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} {-1}
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do_test minmax-10.2 {
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execsql {
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SELECT max(x) FROM t6;
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}
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} {2}
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do_test minmax-10.3 {
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execsql {
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CREATE INDEX i6 ON t6(x);
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SELECT coalesce(min(x),-1) FROM t6;
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}
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} {-1}
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do_test minmax-10.4 {
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execsql {
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SELECT max(x) FROM t6;
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}
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} {2}
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finish_test
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