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# 2008 January 5
#
# The author disclaims copyright to this source code. In place of
# a legal notice, here is a blessing:
#
# May you do good and not evil.
# May you find forgiveness for yourself and forgive others.
# May you share freely, never taking more than you give.
#
#***********************************************************************
# $Id: minmax3.test,v 1.5 2008/07/12 14:52:20 drh Exp $
set testdir [file dirname $argv0]
source $testdir/tester.tcl
# Do an SQL statement. Append the search count to the end of the result.
#
proc count sql {
set ::sqlite_search_count 0
return [concat [execsql $sql] $::sqlite_search_count]
}
# This procedure sets the value of the file-format in file 'test.db'
# to $newval. Also, the schema cookie is incremented.
#
proc set_file_format {newval} {
hexio_write test.db 44 [hexio_render_int32 $newval]
set schemacookie [hexio_get_int [hexio_read test.db 40 4]]
incr schemacookie
hexio_write test.db 40 [hexio_render_int32 $schemacookie]
return {}
}
do_test minmax3-1.0 {
execsql {
CREATE TABLE t1(x, y, z);
}
db close
set_file_format 4
sqlite3 db test.db
execsql {
BEGIN;
INSERT INTO t1 VALUES('1', 'I', 'one');
INSERT INTO t1 VALUES('2', 'IV', 'four');
INSERT INTO t1 VALUES('2', NULL, 'three');
INSERT INTO t1 VALUES('2', 'II', 'two');
INSERT INTO t1 VALUES('2', 'V', 'five');
INSERT INTO t1 VALUES('3', 'VI', 'six');
COMMIT;
}
} {}
do_test minmax3-1.1.1 {
# Linear scan.
count { SELECT max(y) FROM t1 WHERE x = '2'; }
} {V 5}
do_test minmax3-1.1.2 {
# Index optimizes the WHERE x='2' constraint.
execsql { CREATE INDEX i1 ON t1(x) }
count { SELECT max(y) FROM t1 WHERE x = '2'; }
} {V 9}
do_test minmax3-1.1.3 {
# Index optimizes the WHERE x='2' constraint and the MAX(y).
execsql { CREATE INDEX i2 ON t1(x,y) }
count { SELECT max(y) FROM t1 WHERE x = '2'; }
} {V 1}
do_test minmax3-1.1.4 {
# Index optimizes the WHERE x='2' constraint and the MAX(y).
execsql { DROP INDEX i2 ; CREATE INDEX i2 ON t1(x, y DESC) }
count { SELECT max(y) FROM t1 WHERE x = '2'; }
} {V 1}
do_test minmax3-1.1.5 {
count { SELECT max(y) FROM t1 WHERE x = '2' AND y != 'V'; }
} {IV 2}
do_test minmax3-1.1.6 {
count { SELECT max(y) FROM t1 WHERE x = '2' AND y < 'V'; }
} {IV 1}
do_test minmax3-1.1.6 {
count { SELECT max(y) FROM t1 WHERE x = '2' AND z != 'five'; }
} {IV 4}
do_test minmax3-1.2.1 {
# Linear scan of t1.
execsql { DROP INDEX i1 ; DROP INDEX i2 }
count { SELECT min(y) FROM t1 WHERE x = '2'; }
} {II 5}
do_test minmax3-1.2.2 {
# Index i1 optimizes the WHERE x='2' constraint.
execsql { CREATE INDEX i1 ON t1(x) }
count { SELECT min(y) FROM t1 WHERE x = '2'; }
} {II 9}
do_test minmax3-1.2.3 {
# Index i2 optimizes the WHERE x='2' constraint and the min(y).
execsql { CREATE INDEX i2 ON t1(x,y) }
count { SELECT min(y) FROM t1 WHERE x = '2'; }
} {II 1}
do_test minmax3-1.2.4 {
# Index optimizes the WHERE x='2' constraint and the MAX(y).
execsql { DROP INDEX i2 ; CREATE INDEX i2 ON t1(x, y DESC) }
count { SELECT min(y) FROM t1 WHERE x = '2'; }
} {II 1}
do_test minmax3-1.3.1 {
# Linear scan
execsql { DROP INDEX i1 ; DROP INDEX i2 }
count { SELECT min(y) FROM t1; }
} {I 5}
do_test minmax3-1.3.2 {
# Index i1 optimizes the min(y)
execsql { CREATE INDEX i1 ON t1(y) }
count { SELECT min(y) FROM t1; }
} {I 1}
do_test minmax3-1.3.3 {
# Index i1 optimizes the min(y)
execsql { DROP INDEX i1 ; CREATE INDEX i1 ON t1(y DESC) }
count { SELECT min(y) FROM t1; }
} {I 1}
do_test minmax3-1.4.1 {
# Linear scan
execsql { DROP INDEX i1 }
count { SELECT max(y) FROM t1; }
} {VI 5}
do_test minmax3-1.4.2 {
# Index i1 optimizes the max(y)
execsql { CREATE INDEX i1 ON t1(y) }
count { SELECT max(y) FROM t1; }
} {VI 0}
do_test minmax3-1.4.3 {
# Index i1 optimizes the max(y)
execsql { DROP INDEX i1 ; CREATE INDEX i1 ON t1(y DESC) }
execsql { SELECT y from t1}
count { SELECT max(y) FROM t1; }
} {VI 0}
do_test minmax3-1.4.4 {
execsql { DROP INDEX i1 }
} {}
do_test minmax3-2.1 {
execsql {
CREATE TABLE t2(a, b);
CREATE INDEX i3 ON t2(a, b);
INSERT INTO t2 VALUES(1, NULL);
INSERT INTO t2 VALUES(1, 1);
INSERT INTO t2 VALUES(1, 2);
INSERT INTO t2 VALUES(1, 3);
INSERT INTO t2 VALUES(2, NULL);
INSERT INTO t2 VALUES(2, 1);
INSERT INTO t2 VALUES(2, 2);
INSERT INTO t2 VALUES(2, 3);
INSERT INTO t2 VALUES(3, 1);
INSERT INTO t2 VALUES(3, 2);
INSERT INTO t2 VALUES(3, 3);
}
} {}
do_test minmax3-2.2 {
execsql { SELECT min(b) FROM t2 WHERE a = 1; }
} {1}
do_test minmax3-2.3 {
execsql { SELECT min(b) FROM t2 WHERE a = 1 AND b>1; }
} {2}
do_test minmax3-2.4 {
execsql { SELECT min(b) FROM t2 WHERE a = 1 AND b>-1; }
} {1}
do_test minmax3-2.5 {
execsql { SELECT min(b) FROM t2 WHERE a = 1; }
} {1}
do_test minmax3-2.6 {
execsql { SELECT min(b) FROM t2 WHERE a = 1 AND b<2; }
} {1}
do_test minmax3-2.7 {
execsql { SELECT min(b) FROM t2 WHERE a = 1 AND b<1; }
} {{}}
do_test minmax3-2.8 {
execsql { SELECT min(b) FROM t2 WHERE a = 3 AND b<1; }
} {{}}
do_test minmax3-2.1 {
execsql {
DROP TABLE t2;
CREATE TABLE t2(a, b);
CREATE INDEX i3 ON t2(a, b DESC);
INSERT INTO t2 VALUES(1, NULL);
INSERT INTO t2 VALUES(1, 1);
INSERT INTO t2 VALUES(1, 2);
INSERT INTO t2 VALUES(1, 3);
INSERT INTO t2 VALUES(2, NULL);
INSERT INTO t2 VALUES(2, 1);
INSERT INTO t2 VALUES(2, 2);
INSERT INTO t2 VALUES(2, 3);
INSERT INTO t2 VALUES(3, 1);
INSERT INTO t2 VALUES(3, 2);
INSERT INTO t2 VALUES(3, 3);
}
} {}
do_test minmax3-2.2 {
execsql { SELECT min(b) FROM t2 WHERE a = 1; }
} {1}
do_test minmax3-2.3 {
execsql { SELECT min(b) FROM t2 WHERE a = 1 AND b>1; }
} {2}
do_test minmax3-2.4 {
execsql { SELECT min(b) FROM t2 WHERE a = 1 AND b>-1; }
} {1}
do_test minmax3-2.5 {
execsql { SELECT min(b) FROM t2 WHERE a = 1; }
} {1}
do_test minmax3-2.6 {
execsql { SELECT min(b) FROM t2 WHERE a = 1 AND b<2; }
} {1}
do_test minmax3-2.7 {
execsql { SELECT min(b) FROM t2 WHERE a = 1 AND b<1; }
} {{}}
do_test minmax3-2.8 {
execsql { SELECT min(b) FROM t2 WHERE a = 3 AND b<1; }
} {{}}
finish_test
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