wasCSharpSQLite – Rev 1
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# 2005 July 28
#
# 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.
#
#***********************************************************************
# This file implements regression tests for SQLite library. The
# focus of this file is testing the use of indices in WHERE clauses
# based on recent changes to the optimizer.
#
# $Id: where2.test,v 1.15 2009/02/02 01:50:40 drh Exp $
set testdir [file dirname $argv0]
source $testdir/tester.tcl
# Build some test data
#
do_test where2-1.0 {
execsql {
BEGIN;
CREATE TABLE t1(w int, x int, y int, z int);
}
for {set i 1} {$i<=100} {incr i} {
set w $i
set x [expr {int(log($i)/log(2))}]
set y [expr {$i*$i + 2*$i + 1}]
set z [expr {$x+$y}]
ifcapable tclvar {
execsql {INSERT INTO t1 VALUES($::w,$::x,$::y,$::z)}
} else {
execsql {INSERT INTO t1 VALUES(:w,:x,:y,:z)}
}
}
execsql {
CREATE UNIQUE INDEX i1w ON t1(w);
CREATE INDEX i1xy ON t1(x,y);
CREATE INDEX i1zyx ON t1(z,y,x);
COMMIT;
}
} {}
# 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 executes the SQL. Then it checks to see if the OP_Sort
# opcode was executed. If an OP_Sort did occur, then "sort" is appended
# to the result. If no OP_Sort happened, then "nosort" is appended.
#
# This procedure is used to check to make sure sorting is or is not
# occurring as expected.
#
proc cksort {sql} {
set data [execsql $sql]
if {[db status sort]} {set x sort} {set x nosort}
lappend data $x
return $data
}
# This procedure executes the SQL. Then it appends to the result the
# "sort" or "nosort" keyword (as in the cksort procedure above) then
# it appends the ::sqlite_query_plan variable.
#
proc queryplan {sql} {
set ::sqlite_sort_count 0
set data [execsql $sql]
if {$::sqlite_sort_count} {set x sort} {set x nosort}
lappend data $x
return [concat $data $::sqlite_query_plan]
}
# Prefer a UNIQUE index over another index.
#
do_test where2-1.1 {
queryplan {
SELECT * FROM t1 WHERE w=85 AND x=6 AND y=7396
}
} {85 6 7396 7402 nosort t1 i1w}
# Always prefer a rowid== constraint over any other index.
#
do_test where2-1.3 {
queryplan {
SELECT * FROM t1 WHERE w=85 AND x=6 AND y=7396 AND rowid=85
}
} {85 6 7396 7402 nosort t1 *}
# When constrained by a UNIQUE index, the ORDER BY clause is always ignored.
#
do_test where2-2.1 {
queryplan {
SELECT * FROM t1 WHERE w=85 ORDER BY random();
}
} {85 6 7396 7402 nosort t1 i1w}
do_test where2-2.2 {
queryplan {
SELECT * FROM t1 WHERE x=6 AND y=7396 ORDER BY random();
}
} {85 6 7396 7402 sort t1 i1xy}
do_test where2-2.3 {
queryplan {
SELECT * FROM t1 WHERE rowid=85 AND x=6 AND y=7396 ORDER BY random();
}
} {85 6 7396 7402 nosort t1 *}
# Efficient handling of forward and reverse table scans.
#
do_test where2-3.1 {
queryplan {
SELECT * FROM t1 ORDER BY rowid LIMIT 2
}
} {1 0 4 4 2 1 9 10 nosort t1 *}
do_test where2-3.2 {
queryplan {
SELECT * FROM t1 ORDER BY rowid DESC LIMIT 2
}
} {100 6 10201 10207 99 6 10000 10006 nosort t1 *}
# The IN operator can be used by indices at multiple layers
#
ifcapable subquery {
do_test where2-4.1 {
queryplan {
SELECT * FROM t1 WHERE z IN (10207,10006) AND y IN (10000,10201)
AND x>0 AND x<10
ORDER BY w
}
} {99 6 10000 10006 100 6 10201 10207 sort t1 i1zyx}
do_test where2-4.2 {
queryplan {
SELECT * FROM t1 WHERE z IN (10207,10006) AND y=10000
AND x>0 AND x<10
ORDER BY w
}
} {99 6 10000 10006 sort t1 i1zyx}
do_test where2-4.3 {
queryplan {
SELECT * FROM t1 WHERE z=10006 AND y IN (10000,10201)
AND x>0 AND x<10
ORDER BY w
}
} {99 6 10000 10006 sort t1 i1zyx}
ifcapable compound {
do_test where2-4.4 {
queryplan {
SELECT * FROM t1 WHERE z IN (SELECT 10207 UNION SELECT 10006)
AND y IN (10000,10201)
AND x>0 AND x<10
ORDER BY w
}
} {99 6 10000 10006 100 6 10201 10207 sort t1 i1zyx}
do_test where2-4.5 {
queryplan {
SELECT * FROM t1 WHERE z IN (SELECT 10207 UNION SELECT 10006)
AND y IN (SELECT 10000 UNION SELECT 10201)
AND x>0 AND x<10
ORDER BY w
}
} {99 6 10000 10006 100 6 10201 10207 sort t1 i1zyx}
}
do_test where2-4.6 {
queryplan {
SELECT * FROM t1
WHERE x IN (1,2,3,4,5,6,7,8)
AND y IN (10000,10001,10002,10003,10004,10005)
ORDER BY 2
}
} {99 6 10000 10006 sort t1 i1xy}
# Duplicate entires on the RHS of an IN operator do not cause duplicate
# output rows.
#
do_test where2-4.6 {
queryplan {
SELECT * FROM t1 WHERE z IN (10207,10006,10006,10207)
ORDER BY w
}
} {99 6 10000 10006 100 6 10201 10207 sort t1 i1zyx}
ifcapable compound {
do_test where2-4.7 {
queryplan {
SELECT * FROM t1 WHERE z IN (
SELECT 10207 UNION ALL SELECT 10006
UNION ALL SELECT 10006 UNION ALL SELECT 10207)
ORDER BY w
}
} {99 6 10000 10006 100 6 10201 10207 sort t1 i1zyx}
}
} ;# ifcapable subquery
# The use of an IN operator disables the index as a sorter.
#
do_test where2-5.1 {
queryplan {
SELECT * FROM t1 WHERE w=99 ORDER BY w
}
} {99 6 10000 10006 nosort t1 i1w}
ifcapable subquery {
do_test where2-5.2 {
queryplan {
SELECT * FROM t1 WHERE w IN (99) ORDER BY w
}
} {99 6 10000 10006 sort t1 i1w}
}
# Verify that OR clauses get translated into IN operators.
#
set ::idx {}
ifcapable subquery {set ::idx i1w}
do_test where2-6.1.1 {
queryplan {
SELECT * FROM t1 WHERE w=99 OR w=100 ORDER BY +w
}
} [list 99 6 10000 10006 100 6 10201 10207 sort t1 $::idx]
do_test where2-6.1.2 {
queryplan {
SELECT * FROM t1 WHERE 99=w OR 100=w ORDER BY +w
}
} [list 99 6 10000 10006 100 6 10201 10207 sort t1 $::idx]
do_test where2-6.2 {
queryplan {
SELECT * FROM t1 WHERE w=99 OR w=100 OR 6=w ORDER BY +w
}
} [list 6 2 49 51 99 6 10000 10006 100 6 10201 10207 sort t1 $::idx]
do_test where2-6.3 {
queryplan {
SELECT * FROM t1 WHERE w=99 OR w=100 OR 6=+w ORDER BY +w
}
} {6 2 49 51 99 6 10000 10006 100 6 10201 10207 sort t1 {}}
do_test where2-6.4 {
queryplan {
SELECT * FROM t1 WHERE w=99 OR +w=100 OR 6=w ORDER BY +w
}
} {6 2 49 51 99 6 10000 10006 100 6 10201 10207 sort t1 {}}
set ::idx {}
ifcapable subquery {set ::idx i1zyx}
do_test where2-6.5 {
queryplan {
SELECT b.* FROM t1 a, t1 b
WHERE a.w=1 AND (a.y=b.z OR b.z=10)
ORDER BY +b.w
}
} [list 1 0 4 4 2 1 9 10 sort a i1w b $::idx]
do_test where2-6.6 {
queryplan {
SELECT b.* FROM t1 a, t1 b
WHERE a.w=1 AND (b.z=10 OR a.y=b.z OR b.z=10)
ORDER BY +b.w
}
} [list 1 0 4 4 2 1 9 10 sort a i1w b $::idx]
# Ticket #2249. Make sure the OR optimization is not attempted if
# comparisons between columns of different affinities are needed.
#
do_test where2-6.7 {
execsql {
CREATE TABLE t2249a(a TEXT UNIQUE);
CREATE TABLE t2249b(b INTEGER);
INSERT INTO t2249a VALUES('0123');
INSERT INTO t2249b VALUES(123);
}
queryplan {
-- Because a is type TEXT and b is type INTEGER, both a and b
-- will attempt to convert to NUMERIC before the comparison.
-- They will thus compare equal.
--
SELECT * FROM t2249b CROSS JOIN t2249a WHERE a=b;
}
} {123 0123 nosort t2249b {} t2249a {}}
do_test where2-6.9 {
queryplan {
-- The + operator removes affinity from the rhs. No conversions
-- occur and the comparison is false. The result is an empty set.
--
SELECT * FROM t2249b CROSS JOIN t2249a WHERE a=+b;
}
} {nosort t2249b {} {} sqlite_autoindex_t2249a_1}
do_test where2-6.9.2 {
# The same thing but with the expression flipped around.
queryplan {
SELECT * FROM t2249b CROSS JOIN t2249a WHERE +b=a
}
} {nosort t2249b {} {} sqlite_autoindex_t2249a_1}
do_test where2-6.10 {
queryplan {
-- Use + on both sides of the comparison to disable indices
-- completely. Make sure we get the same result.
--
SELECT * FROM t2249b CROSS JOIN t2249a WHERE +a=+b;
}
} {nosort t2249b {} t2249a {}}
do_test where2-6.11 {
# This will not attempt the OR optimization because of the a=b
# comparison.
queryplan {
SELECT * FROM t2249b CROSS JOIN t2249a WHERE a=b OR a='hello';
}
} {123 0123 nosort t2249b {} t2249a {}}
do_test where2-6.11.2 {
# Permutations of the expression terms.
queryplan {
SELECT * FROM t2249b CROSS JOIN t2249a WHERE b=a OR a='hello';
}
} {123 0123 nosort t2249b {} t2249a {}}
do_test where2-6.11.3 {
# Permutations of the expression terms.
queryplan {
SELECT * FROM t2249b CROSS JOIN t2249a WHERE 'hello'=a OR b=a;
}
} {123 0123 nosort t2249b {} t2249a {}}
do_test where2-6.11.4 {
# Permutations of the expression terms.
queryplan {
SELECT * FROM t2249b CROSS JOIN t2249a WHERE a='hello' OR b=a;
}
} {123 0123 nosort t2249b {} t2249a {}}
ifcapable explain&&subquery {
# These tests are not run if subquery support is not included in the
# build. This is because these tests test the "a = 1 OR a = 2" to
# "a IN (1, 2)" optimisation transformation, which is not enabled if
# subqueries and the IN operator is not available.
#
do_test where2-6.12 {
# In this case, the +b disables the affinity conflict and allows
# the OR optimization to be used again. The result is now an empty
# set, the same as in where2-6.9.
queryplan {
SELECT * FROM t2249b CROSS JOIN t2249a WHERE a=+b OR a='hello';
}
} {nosort t2249b {} {} sqlite_autoindex_t2249a_1}
do_test where2-6.12.2 {
# In this case, the +b disables the affinity conflict and allows
# the OR optimization to be used again. The result is now an empty
# set, the same as in where2-6.9.
queryplan {
SELECT * FROM t2249b CROSS JOIN t2249a WHERE a='hello' OR +b=a;
}
} {nosort t2249b {} {} sqlite_autoindex_t2249a_1}
do_test where2-6.12.3 {
# In this case, the +b disables the affinity conflict and allows
# the OR optimization to be used again. The result is now an empty
# set, the same as in where2-6.9.
queryplan {
SELECT * FROM t2249b CROSS JOIN t2249a WHERE +b=a OR a='hello';
}
} {nosort t2249b {} {} sqlite_autoindex_t2249a_1}
do_test where2-6.13 {
# The addition of +a on the second term disabled the OR optimization.
# But we should still get the same empty-set result as in where2-6.9.
queryplan {
SELECT * FROM t2249b CROSS JOIN t2249a WHERE a=+b OR +a='hello';
}
} {nosort t2249b {} t2249a {}}
}
# Variations on the order of terms in a WHERE clause in order
# to make sure the OR optimizer can recognize them all.
do_test where2-6.20 {
queryplan {
SELECT * FROM t2249a x CROSS JOIN t2249a y WHERE x.a=y.a
}
} {0123 0123 nosort x {} {} sqlite_autoindex_t2249a_1}
ifcapable explain&&subquery {
# These tests are not run if subquery support is not included in the
# build. This is because these tests test the "a = 1 OR a = 2" to
# "a IN (1, 2)" optimisation transformation, which is not enabled if
# subqueries and the IN operator is not available.
#
do_test where2-6.21 {
queryplan {
SELECT * FROM t2249a x CROSS JOIN t2249a y WHERE x.a=y.a OR y.a='hello'
}
} {0123 0123 nosort x {} {} sqlite_autoindex_t2249a_1}
do_test where2-6.22 {
queryplan {
SELECT * FROM t2249a x CROSS JOIN t2249a y WHERE y.a=x.a OR y.a='hello'
}
} {0123 0123 nosort x {} {} sqlite_autoindex_t2249a_1}
do_test where2-6.23 {
queryplan {
SELECT * FROM t2249a x CROSS JOIN t2249a y WHERE y.a='hello' OR x.a=y.a
}
} {0123 0123 nosort x {} {} sqlite_autoindex_t2249a_1}
}
# Unique queries (queries that are guaranteed to return only a single
# row of result) do not call the sorter. But all tables must give
# a unique result. If any one table in the join does not give a unique
# result then sorting is necessary.
#
do_test where2-7.1 {
cksort {
create table t8(a unique, b, c);
insert into t8 values(1,2,3);
insert into t8 values(2,3,4);
create table t9(x,y);
insert into t9 values(2,4);
insert into t9 values(2,3);
select y from t8, t9 where a=1 order by a, y;
}
} {3 4 sort}
do_test where2-7.2 {
cksort {
select * from t8 where a=1 order by b, c
}
} {1 2 3 nosort}
do_test where2-7.3 {
cksort {
select * from t8, t9 where a=1 and y=3 order by b, x
}
} {1 2 3 2 3 sort}
do_test where2-7.4 {
cksort {
create unique index i9y on t9(y);
select * from t8, t9 where a=1 and y=3 order by b, x
}
} {1 2 3 2 3 nosort}
# Ticket #1807. Using IN constrains on multiple columns of
# a multi-column index.
#
ifcapable subquery {
do_test where2-8.1 {
execsql {
SELECT * FROM t1 WHERE x IN (20,21) AND y IN (1,2)
}
} {}
do_test where2-8.2 {
execsql {
SELECT * FROM t1 WHERE x IN (1,2) AND y IN (-5,-6)
}
} {}
execsql {CREATE TABLE tx AS SELECT * FROM t1}
do_test where2-8.3 {
execsql {
SELECT w FROM t1
WHERE x IN (SELECT x FROM tx WHERE rowid<0)
AND +y IN (SELECT y FROM tx WHERE rowid=1)
}
} {}
do_test where2-8.4 {
execsql {
SELECT w FROM t1
WHERE x IN (SELECT x FROM tx WHERE rowid=1)
AND y IN (SELECT y FROM tx WHERE rowid<0)
}
} {}
#set sqlite_where_trace 1
do_test where2-8.5 {
execsql {
CREATE INDEX tx_xyz ON tx(x, y, z, w);
SELECT w FROM tx
WHERE x IN (SELECT x FROM t1 WHERE w BETWEEN 10 AND 20)
AND y IN (SELECT y FROM t1 WHERE w BETWEEN 10 AND 20)
AND z IN (SELECT z FROM t1 WHERE w BETWEEN 12 AND 14)
}
} {12 13 14}
do_test where2-8.6 {
execsql {
SELECT w FROM tx
WHERE x IN (SELECT x FROM t1 WHERE w BETWEEN 10 AND 20)
AND y IN (SELECT y FROM t1 WHERE w BETWEEN 12 AND 14)
AND z IN (SELECT z FROM t1 WHERE w BETWEEN 10 AND 20)
}
} {12 13 14}
do_test where2-8.7 {
execsql {
SELECT w FROM tx
WHERE x IN (SELECT x FROM t1 WHERE w BETWEEN 12 AND 14)
AND y IN (SELECT y FROM t1 WHERE w BETWEEN 10 AND 20)
AND z IN (SELECT z FROM t1 WHERE w BETWEEN 10 AND 20)
}
} {10 11 12 13 14 15}
do_test where2-8.8 {
execsql {
SELECT w FROM tx
WHERE x IN (SELECT x FROM t1 WHERE w BETWEEN 10 AND 20)
AND y IN (SELECT y FROM t1 WHERE w BETWEEN 10 AND 20)
AND z IN (SELECT z FROM t1 WHERE w BETWEEN 10 AND 20)
}
} {10 11 12 13 14 15 16 17 18 19 20}
do_test where2-8.9 {
execsql {
SELECT w FROM tx
WHERE x IN (SELECT x FROM t1 WHERE w BETWEEN 10 AND 20)
AND y IN (SELECT y FROM t1 WHERE w BETWEEN 10 AND 20)
AND z IN (SELECT z FROM t1 WHERE w BETWEEN 2 AND 4)
}
} {}
do_test where2-8.10 {
execsql {
SELECT w FROM tx
WHERE x IN (SELECT x FROM t1 WHERE w BETWEEN 10 AND 20)
AND y IN (SELECT y FROM t1 WHERE w BETWEEN 2 AND 4)
AND z IN (SELECT z FROM t1 WHERE w BETWEEN 10 AND 20)
}
} {}
do_test where2-8.11 {
execsql {
SELECT w FROM tx
WHERE x IN (SELECT x FROM t1 WHERE w BETWEEN 2 AND 4)
AND y IN (SELECT y FROM t1 WHERE w BETWEEN 10 AND 20)
AND z IN (SELECT z FROM t1 WHERE w BETWEEN 10 AND 20)
}
} {}
do_test where2-8.12 {
execsql {
SELECT w FROM tx
WHERE x IN (SELECT x FROM t1 WHERE w BETWEEN 10 AND 20)
AND y IN (SELECT y FROM t1 WHERE w BETWEEN 10 AND 20)
AND z IN (SELECT z FROM t1 WHERE w BETWEEN -4 AND -2)
}
} {}
do_test where2-8.13 {
execsql {
SELECT w FROM tx
WHERE x IN (SELECT x FROM t1 WHERE w BETWEEN 10 AND 20)
AND y IN (SELECT y FROM t1 WHERE w BETWEEN -4 AND -2)
AND z IN (SELECT z FROM t1 WHERE w BETWEEN 10 AND 20)
}
} {}
do_test where2-8.14 {
execsql {
SELECT w FROM tx
WHERE x IN (SELECT x FROM t1 WHERE w BETWEEN -4 AND -2)
AND y IN (SELECT y FROM t1 WHERE w BETWEEN 10 AND 20)
AND z IN (SELECT z FROM t1 WHERE w BETWEEN 10 AND 20)
}
} {}
do_test where2-8.15 {
execsql {
SELECT w FROM tx
WHERE x IN (SELECT x FROM t1 WHERE w BETWEEN 10 AND 20)
AND y IN (SELECT y FROM t1 WHERE w BETWEEN 10 AND 20)
AND z IN (SELECT z FROM t1 WHERE w BETWEEN 200 AND 300)
}
} {}
do_test where2-8.16 {
execsql {
SELECT w FROM tx
WHERE x IN (SELECT x FROM t1 WHERE w BETWEEN 10 AND 20)
AND y IN (SELECT y FROM t1 WHERE w BETWEEN 200 AND 300)
AND z IN (SELECT z FROM t1 WHERE w BETWEEN 10 AND 20)
}
} {}
do_test where2-8.17 {
execsql {
SELECT w FROM tx
WHERE x IN (SELECT x FROM t1 WHERE w BETWEEN 200 AND 300)
AND y IN (SELECT y FROM t1 WHERE w BETWEEN 10 AND 20)
AND z IN (SELECT z FROM t1 WHERE w BETWEEN 10 AND 20)
}
} {}
do_test where2-8.18 {
execsql {
SELECT w FROM tx
WHERE x IN (SELECT x FROM t1 WHERE +w BETWEEN 10 AND 20)
AND y IN (SELECT y FROM t1 WHERE +w BETWEEN 10 AND 20)
AND z IN (SELECT z FROM t1 WHERE +w BETWEEN 200 AND 300)
}
} {}
do_test where2-8.19 {
execsql {
SELECT w FROM tx
WHERE x IN (SELECT x FROM t1 WHERE +w BETWEEN 10 AND 20)
AND y IN (SELECT y FROM t1 WHERE +w BETWEEN 200 AND 300)
AND z IN (SELECT z FROM t1 WHERE +w BETWEEN 10 AND 20)
}
} {}
do_test where2-8.20 {
execsql {
SELECT w FROM tx
WHERE x IN (SELECT x FROM t1 WHERE +w BETWEEN 200 AND 300)
AND y IN (SELECT y FROM t1 WHERE +w BETWEEN 10 AND 20)
AND z IN (SELECT z FROM t1 WHERE +w BETWEEN 10 AND 20)
}
} {}
}
# Make sure WHERE clauses of the form A=1 AND (B=2 OR B=3) are optimized
# when we have an index on A and B.
#
ifcapable or_opt&&tclvar {
do_test where2-9.1 {
execsql {
BEGIN;
CREATE TABLE t10(a,b,c);
INSERT INTO t10 VALUES(1,1,1);
INSERT INTO t10 VALUES(1,2,2);
INSERT INTO t10 VALUES(1,3,3);
}
for {set i 4} {$i<=1000} {incr i} {
execsql {INSERT INTO t10 VALUES(1,$i,$i)}
}
execsql {
CREATE INDEX i10 ON t10(a,b);
COMMIT;
SELECT count(*) FROM t10;
}
} 1000
ifcapable subquery {
do_test where2-9.2 {
count {
SELECT * FROM t10 WHERE a=1 AND (b=2 OR b=3)
}
} {1 2 2 1 3 3 7}
}
}
# Indices with redundant columns
#
do_test where2-11.1 {
execsql {
CREATE TABLE t11(a,b,c,d);
CREATE INDEX i11aba ON t11(a,b,a,c); -- column A occurs twice.
INSERT INTO t11 VALUES(1,2,3,4);
INSERT INTO t11 VALUES(5,6,7,8);
INSERT INTO t11 VALUES(1,2,9,10);
INSERT INTO t11 VALUES(5,11,12,13);
SELECT c FROM t11 WHERE a=1 AND b=2 ORDER BY c;
}
} {3 9}
do_test where2-11.2 {
execsql {
CREATE INDEX i11cccccccc ON t11(c,c,c,c,c,c,c,c); -- repeated column
SELECT d FROM t11 WHERE c=9;
}
} {10}
do_test where2-11.3 {
execsql {
SELECT d FROM t11 WHERE c IN (1,2,3,4,5);
}
} {4}
do_test where2-11.4 {
execsql {
SELECT d FROM t11 WHERE c=7 OR (a=1 AND b=2) ORDER BY d;
}
} {4 8 10}
finish_test