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sqlite/test/where2.test
drh ffe0f8901e Correctly handle multi-column indices where multiple columns are constrained 
by IN operators with subqueries on the right-hand side.  Ticket #1807. (CVS 3184)

FossilOrigin-Name: b16541ba5e6a9514f9f317888117c68b6818f9cb
2006-05-11 13:26:25 +00:00

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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 1.9 2006/05/11 13:26:26 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 ::sqlite_sort_count 0
set data [execsql $sql]
if {$::sqlite_sort_count} {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(5);
}
} {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(5);
}
} {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(5);
}
} {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 {
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 where2-6.2 {
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]
# 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)
}
} {}
}
finish_test
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