633 lines
14 KiB
Plaintext
633 lines
14 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 1.21 2008/07/08 18:05:26 drh Exp $
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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set ::testprefix minmax
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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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} {0}
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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-1.21 {
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execsql {SELECT min(x) FROM t1 WHERE x=5}
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} {5}
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do_test minmax-1.22 {
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execsql {SELECT min(x) FROM t1 WHERE x>=5}
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} {5}
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do_test minmax-1.23 {
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execsql {SELECT min(x) FROM t1 WHERE x>=4.5}
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} {5}
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do_test minmax-1.24 {
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execsql {SELECT min(x) FROM t1 WHERE x<4.5}
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} {1}
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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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ifcapable subquery {
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execsql {INSERT INTO t2 VALUES((SELECT max(a) FROM t2)+1,999)}
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} else {
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db function max_a_t2 {execsql {SELECT max(a) FROM t2}}
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execsql {INSERT INTO t2 VALUES(max_a_t2()+1,999)}
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}
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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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ifcapable subquery {
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execsql {INSERT INTO t2 VALUES((SELECT max(a) FROM t2)+1,999)}
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} else {
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db function max_a_t2 {execsql {SELECT max(a) FROM t2}}
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execsql {INSERT INTO t2 VALUES(max_a_t2()+1,999)}
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}
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set sqlite_search_count 0
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ifcapable subquery {
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execsql { SELECT b FROM t2 WHERE a=(SELECT max(a) FROM t2) }
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} else {
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execsql { SELECT b FROM t2 WHERE a=max_a_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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ifcapable {compound && subquery} {
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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, coalesce(sum(x),0) FROM
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(SELECT null AS x, y+1 AS y 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 AS x, y+1 AS y 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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} ;# ifcapable compound
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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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ifcapable subquery {
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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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}
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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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ifcapable subquery {
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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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}
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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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ifcapable {compound && subquery} {
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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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} {{}}
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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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} ;# ifcapable compound&&subquery
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# If there is a NULL in an aggregate max() or min(), ignore it. An
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# aggregate min() or max() will only return NULL if all values are NULL.
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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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do_test minmax-10.5 {
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execsql {
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DELETE FROM t6 WHERE x NOT NULL;
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SELECT count(*) FROM t6;
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}
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} 1
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do_test minmax-10.6 {
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execsql {
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SELECT count(x) FROM t6;
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}
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} 0
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ifcapable subquery {
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do_test minmax-10.7 {
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execsql {
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SELECT (SELECT min(x) FROM t6), (SELECT max(x) FROM t6);
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}
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} {{} {}}
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}
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do_test minmax-10.8 {
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execsql {
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SELECT min(x), max(x) FROM t6;
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}
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} {{} {}}
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do_test minmax-10.9 {
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execsql {
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INSERT INTO t6 SELECT * FROM t6;
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INSERT INTO t6 SELECT * FROM t6;
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INSERT INTO t6 SELECT * FROM t6;
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INSERT INTO t6 SELECT * FROM t6;
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INSERT INTO t6 SELECT * FROM t6;
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INSERT INTO t6 SELECT * FROM t6;
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INSERT INTO t6 SELECT * FROM t6;
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INSERT INTO t6 SELECT * FROM t6;
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INSERT INTO t6 SELECT * FROM t6;
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INSERT INTO t6 SELECT * FROM t6;
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SELECT count(*) FROM t6;
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}
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} 1024
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do_test minmax-10.10 {
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execsql {
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SELECT count(x) FROM t6;
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}
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} 0
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ifcapable subquery {
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do_test minmax-10.11 {
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execsql {
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SELECT (SELECT min(x) FROM t6), (SELECT max(x) FROM t6);
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}
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} {{} {}}
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}
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do_test minmax-10.12 {
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execsql {
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SELECT min(x), max(x) FROM t6;
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}
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} {{} {}}
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do_test minmax-11.1 {
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execsql {
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CREATE INDEX t1i2 ON t1(y,x);
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SELECT min(x) FROM t1 WHERE y=5;
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}
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} {16}
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do_test minmax-11.2 {
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execsql {
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SELECT max(x) FROM t1 WHERE y=5;
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}
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} {20}
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do_test minmax-11.3 {
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execsql {
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SELECT min(x) FROM t1 WHERE y=6;
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}
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} {{}}
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do_test minmax-11.4 {
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execsql {
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SELECT max(x) FROM t1 WHERE y=6;
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}
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} {{}}
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do_test minmax-11.5 {
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execsql {
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SELECT min(x) FROM t1 WHERE y=1;
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}
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} {1}
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do_test minmax-11.6 {
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execsql {
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SELECT max(x) FROM t1 WHERE y=1;
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}
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} {1}
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do_test minmax-11.7 {
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execsql {
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SELECT min(x) FROM t1 WHERE y=0;
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}
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} {{}}
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do_test minmax-11.8 {
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execsql {
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SELECT max(x) FROM t1 WHERE y=0;
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}
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} {{}}
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do_test minmax-11.9 {
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execsql {
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SELECT min(x) FROM t1 WHERE y=5 AND x>=17.5;
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}
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} {18}
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do_test minmax-11.10 {
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execsql {
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SELECT max(x) FROM t1 WHERE y=5 AND x>=17.5;
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}
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} {20}
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do_test minmax-12.1 {
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execsql {
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CREATE TABLE t7(a,b,c);
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INSERT INTO t7 SELECT y, x, x*y FROM t1;
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INSERT INTO t7 SELECT y, x, x*y+1000 FROM t1;
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CREATE INDEX t7i1 ON t7(a,b,c);
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SELECT min(a) FROM t7;
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}
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} {1}
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do_test minmax-12.2 {
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execsql {
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SELECT max(a) FROM t7;
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}
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} {5}
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do_test minmax-12.3 {
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execsql {
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SELECT max(a) FROM t7 WHERE a=5;
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}
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} {5}
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do_test minmax-12.4 {
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execsql {
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SELECT min(b) FROM t7 WHERE a=5;
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}
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} {16}
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do_test minmax-12.5 {
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execsql {
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SELECT max(b) FROM t7 WHERE a=5;
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}
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} {20}
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do_test minmax-12.6 {
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execsql {
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SELECT min(b) FROM t7 WHERE a=4;
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}
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} {8}
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do_test minmax-12.7 {
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execsql {
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SELECT max(b) FROM t7 WHERE a=4;
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}
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} {15}
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do_test minmax-12.8 {
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execsql {
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SELECT min(c) FROM t7 WHERE a=4 AND b=10;
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}
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} {40}
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do_test minmax-12.9 {
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execsql {
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SELECT max(c) FROM t7 WHERE a=4 AND b=10;
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}
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} {1040}
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do_test minmax-12.10 {
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execsql {
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SELECT min(rowid) FROM t7;
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}
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} {1}
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do_test minmax-12.11 {
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execsql {
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SELECT max(rowid) FROM t7;
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}
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} {40}
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do_test minmax-12.12 {
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execsql {
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SELECT min(rowid) FROM t7 WHERE a=3;
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}
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} {4}
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do_test minmax-12.13 {
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execsql {
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SELECT max(rowid) FROM t7 WHERE a=3;
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}
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} {27}
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do_test minmax-12.14 {
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execsql {
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SELECT min(rowid) FROM t7 WHERE a=3 AND b=5;
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}
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} {5}
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do_test minmax-12.15 {
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execsql {
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SELECT max(rowid) FROM t7 WHERE a=3 AND b=5;
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}
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} {25}
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do_test minmax-12.16 {
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execsql {
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SELECT min(rowid) FROM t7 WHERE a=3 AND b=5 AND c=1015;
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}
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} {25}
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do_test minmax-12.17 {
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execsql {
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SELECT max(rowid) FROM t7 WHERE a=3 AND b=5 AND c=15;
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}
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} {5}
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#-------------------------------------------------------------------------
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reset_db
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proc do_test_13 {op name sql1 sql2 res} {
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set ::sqlite_search_count 0
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uplevel [list do_execsql_test $name.1 $sql1 $res]
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set a $::sqlite_search_count
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set ::sqlite_search_count 0
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uplevel [list do_execsql_test $name.2 $sql2 $res]
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set b $::sqlite_search_count
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uplevel [list do_test $name.3 [list expr "$a $op $b"] 1]
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}
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# Run a test named $name. Check that SQL statements $sql1 and $sql2 both
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# return the same result, but that $sql2 increments the $sqlite_search_count
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# variable more often (indicating that it is visiting more rows to determine
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# the result).
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#
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proc do_test_13_opt {name sql1 sql2 res} {
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uplevel [list do_test_13 < $name $sql1 $sql2 $res]
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}
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# Like [do_test_13_noopt], except this time check that the $sqlite_search_count
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# variable is incremented the same number of times by both SQL statements.
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#
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proc do_test_13_noopt {name sql1 sql2 res} {
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uplevel [list do_test_13 == $name $sql1 $sql2 $res]
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}
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do_execsql_test 13.1 {
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CREATE TABLE t1(a, b, c);
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INSERT INTO t1 VALUES('a', 1, 1);
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INSERT INTO t1 VALUES('b', 6, 6);
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INSERT INTO t1 VALUES('c', 5, 5);
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INSERT INTO t1 VALUES('a', 4, 4);
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INSERT INTO t1 VALUES('a', 5, 5);
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INSERT INTO t1 VALUES('c', 6, 6);
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INSERT INTO t1 VALUES('b', 4, 4);
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INSERT INTO t1 VALUES('c', 7, 7);
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INSERT INTO t1 VALUES('b', 2, 2);
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INSERT INTO t1 VALUES('b', 3, 3);
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INSERT INTO t1 VALUES('a', 3, 3);
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INSERT INTO t1 VALUES('b', 5, 5);
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INSERT INTO t1 VALUES('c', 4, 4);
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INSERT INTO t1 VALUES('c', 3, 3);
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INSERT INTO t1 VALUES('a', 2, 2);
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SELECT * FROM t1 ORDER BY a, b, c;
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} {a 1 1 a 2 2 a 3 3 a 4 4 a 5 5
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b 2 2 b 3 3 b 4 4 b 5 5 b 6 6
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c 3 3 c 4 4 c 5 5 c 6 6 c 7 7
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}
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do_execsql_test 13.2 { CREATE INDEX i1 ON t1(a, b, c) }
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do_test_13_opt 13.3 {
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SELECT min(b) FROM t1 WHERE a='b'
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} {
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SELECT min(c) FROM t1 WHERE a='b'
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} {2}
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do_test_13_opt 13.4 {
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SELECT a, min(b) FROM t1 WHERE a='b'
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} {
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SELECT a, min(c) FROM t1 WHERE a='b'
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} {b 2}
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do_test_13_opt 13.4 {
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SELECT a||c, max(b)+4 FROM t1 WHERE a='c'
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} {
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SELECT a||c, max(c)+4 FROM t1 WHERE a='c'
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} {c7 11}
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do_test_13_noopt 13.5 {
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SELECT a||c, max(b+1) FROM t1 WHERE a='c'
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} {
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SELECT a||c, max(c+1) FROM t1 WHERE a='c'
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} {c7 8}
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do_test_13_noopt 13.6 {
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SELECT count(b) FROM t1 WHERE a='c'
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} {
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SELECT count(c) FROM t1 WHERE a='c'
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} {5}
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do_test_13_noopt 13.7 {
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SELECT min(b), count(b) FROM t1 WHERE a='a';
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} {
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SELECT min(c), count(c) FROM t1 WHERE a='a';
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} {1 5}
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finish_test
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