mirror of
https://github.com/sqlite/sqlite.git
synced 2024-11-28 07:51:10 +01:00
313 lines
9.1 KiB
Plaintext
313 lines
9.1 KiB
Plaintext
# 2012 November 9
|
|
#
|
|
# 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.
|
|
#
|
|
#***********************************************************************
|
|
#
|
|
# Test cases for query planning decisions.
|
|
|
|
|
|
#
|
|
# The tests in this file demonstrate the behaviour of the query planner
|
|
# in determining the order in which joined tables are scanned.
|
|
#
|
|
# Assume there are two tables being joined - t1 and t2. Each has a cost
|
|
# if it is the outer loop, and a cost if it is the inner loop. As follows:
|
|
#
|
|
# t1(outer) - cost of scanning t1 as the outer loop.
|
|
# t1(inner) - cost of scanning t1 as the inner loop.
|
|
# t2(outer) - cost of scanning t2 as the outer loop.
|
|
# t2(inner) - cost of scanning t2 as the inner loop.
|
|
#
|
|
# Depending on the order in which the planner nests the scans, the total
|
|
# cost of the join query is one of:
|
|
#
|
|
# t1(outer) * t2(inner)
|
|
# t2(outer) * t1(inner)
|
|
#
|
|
# The tests in this file attempt to verify that the planner nests joins in
|
|
# the correct order when the following are true:
|
|
#
|
|
# + (t1(outer) * t2(inner)) > (t1(inner) * t2(outer)
|
|
# + t1(outer) < t2(outer)
|
|
#
|
|
# In other words, when the best overall query plan has t2 as the outer loop,
|
|
# but when the outer loop is considered independent of the inner, t1 is the
|
|
# most efficient choice.
|
|
#
|
|
# In order to make them more predictable, automatic indexes are turned off for
|
|
# the tests in this file.
|
|
#
|
|
|
|
set testdir [file dirname $argv0]
|
|
source $testdir/tester.tcl
|
|
set testprefix whereF
|
|
|
|
do_execsql_test 1.0 {
|
|
PRAGMA automatic_index = 0;
|
|
CREATE TABLE t1(a, b, c);
|
|
CREATE TABLE t2(d, e, f);
|
|
CREATE UNIQUE INDEX i1 ON t1(a);
|
|
CREATE UNIQUE INDEX i2 ON t2(d);
|
|
} {}
|
|
|
|
foreach {tn sql} {
|
|
1 "SELECT * FROM t1, t2 WHERE t1.a=t2.e AND t2.d<t1.b AND t1.c!=10"
|
|
2 "SELECT * FROM t2, t1 WHERE t1.a=t2.e AND t2.d<t1.b AND t1.c!=10"
|
|
3 "SELECT * FROM t2 CROSS JOIN t1 WHERE t1.a=t2.e AND t2.d<t1.b AND t1.c!=10"
|
|
} {
|
|
do_test 1.$tn {
|
|
db eval "EXPLAIN QUERY PLAN $sql"
|
|
} {/.*SCAN t2\y.*SEARCH t1\y.*/}
|
|
}
|
|
|
|
do_execsql_test 2.0 {
|
|
DROP TABLE t1;
|
|
DROP TABLE t2;
|
|
CREATE TABLE t1(a, b, c);
|
|
CREATE TABLE t2(d, e, f);
|
|
|
|
CREATE UNIQUE INDEX i1 ON t1(a);
|
|
CREATE UNIQUE INDEX i2 ON t1(b);
|
|
CREATE UNIQUE INDEX i3 ON t2(d);
|
|
} {}
|
|
|
|
foreach {tn sql} {
|
|
1 "SELECT * FROM t1, t2 WHERE t1.a>? AND t2.d>t1.c AND t1.b=t2.e"
|
|
2 "SELECT * FROM t2, t1 WHERE t1.a>? AND t2.d>t1.c AND t1.b=t2.e"
|
|
3 "SELECT * FROM t2 CROSS JOIN t1 WHERE t1.a>? AND t2.d>t1.c AND t1.b=t2.e"
|
|
} {
|
|
do_test 2.$tn {
|
|
db eval "EXPLAIN QUERY PLAN $sql"
|
|
} {/.*SCAN t2\y.*SEARCH t1\y.*/}
|
|
}
|
|
|
|
do_execsql_test 3.0 {
|
|
DROP TABLE t1;
|
|
DROP TABLE t2;
|
|
CREATE TABLE t1(a, b, c);
|
|
CREATE TABLE t2(d, e, f);
|
|
|
|
CREATE UNIQUE INDEX i1 ON t1(a, b);
|
|
CREATE INDEX i2 ON t2(d);
|
|
} {}
|
|
|
|
foreach {tn sql} {
|
|
1 {SELECT t1.a, t1.b, t2.d, t2.e FROM t1, t2
|
|
WHERE t2.d=t1.b AND t1.a=(t2.d+1) AND t1.b = (t2.e+1)}
|
|
|
|
2 {SELECT t1.a, t1.b, t2.d, t2.e FROM t2, t1
|
|
WHERE t2.d=t1.b AND t1.a=(t2.d+1) AND t1.b = (t2.e+1)}
|
|
|
|
3 {SELECT t1.a, t1.b, t2.d, t2.e FROM t2 CROSS JOIN t1
|
|
WHERE t2.d=t1.b AND t1.a=(t2.d+1) AND t1.b = (t2.e+1)}
|
|
} {
|
|
do_test 3.$tn {
|
|
db eval "EXPLAIN QUERY PLAN $sql"
|
|
} {/.*SCAN t2\y.*SEARCH t1\y.*/}
|
|
}
|
|
|
|
do_execsql_test 4.0 {
|
|
CREATE TABLE t4(a,b,c,d,e, PRIMARY KEY(a,b,c));
|
|
CREATE INDEX t4adc ON t4(a,d,c);
|
|
CREATE UNIQUE INDEX t4aebc ON t4(a,e,b,c);
|
|
EXPLAIN QUERY PLAN SELECT rowid FROM t4 WHERE a=? AND b=?;
|
|
} {/a=. AND b=./}
|
|
|
|
#-------------------------------------------------------------------------
|
|
# Test the following case:
|
|
#
|
|
# ... FROM t1, t2 WHERE (
|
|
# t2.rowid = +t1.rowid OR (t2.f2 = t1.f1 AND t1.f1!=-1)
|
|
# )
|
|
#
|
|
# where there is an index on t2(f2). The planner should use "t1" as the
|
|
# outer loop. The inner loop, on "t2", is an OR optimization. One pass
|
|
# for:
|
|
#
|
|
# t2.rowid = $1
|
|
#
|
|
# and another for:
|
|
#
|
|
# t2.f2=$1 AND $1!=-1
|
|
#
|
|
# the test is to ensure that on the second pass, the ($1!=-1) condition
|
|
# is tested before any seek operations are performed - i.e. outside of
|
|
# the loop through the f2=$1 range of the t2(f2) index.
|
|
#
|
|
reset_db
|
|
do_execsql_test 5.0 {
|
|
CREATE TABLE t1(f1);
|
|
CREATE TABLE t2(f2);
|
|
CREATE INDEX t2f ON t2(f2);
|
|
|
|
INSERT INTO t1 VALUES(-1);
|
|
INSERT INTO t1 VALUES(-1);
|
|
INSERT INTO t1 VALUES(-1);
|
|
INSERT INTO t1 VALUES(-1);
|
|
|
|
WITH w(i) AS (
|
|
SELECT 1 UNION ALL SELECT i+1 FROM w WHERE i<1000
|
|
)
|
|
INSERT INTO t2 SELECT -1 FROM w;
|
|
}
|
|
|
|
do_execsql_test 5.1 {
|
|
SELECT count(*) FROM t1, t2 WHERE t2.rowid = +t1.rowid
|
|
} {4}
|
|
do_test 5.2 { expr [db status vmstep]<200 } 1
|
|
|
|
do_execsql_test 5.3 {
|
|
SELECT count(*) FROM t1, t2 WHERE (
|
|
t2.rowid = +t1.rowid OR t2.f2 = t1.f1
|
|
)
|
|
} {4000}
|
|
do_test 5.4 { expr [db status vmstep]>1000 } 1
|
|
|
|
do_execsql_test 5.5 {
|
|
SELECT count(*) FROM t1, t2 WHERE (
|
|
t2.rowid = +t1.rowid OR (t2.f2 = t1.f1 AND t1.f1!=-1)
|
|
)
|
|
} {4}
|
|
do_test 5.6 { expr [db status vmstep]<200 } 1
|
|
|
|
# 2017-09-04 ticket b899b6042f97f52d
|
|
# Segfault on correlated subquery...
|
|
#
|
|
ifcapable json1&&vtab {
|
|
do_execsql_test 6.1 {
|
|
CREATE TABLE t6(x);
|
|
SELECT * FROM t6 WHERE 1 IN (SELECT value FROM json_each(x));
|
|
} {}
|
|
|
|
do_execsql_test 6.2 {
|
|
DROP TABLE t6;
|
|
CREATE TABLE t6(a,b,c);
|
|
INSERT INTO t6 VALUES
|
|
(0,null,'{"a":0,"b":[3,4,5],"c":{"x":4.5,"y":7.8}}'),
|
|
(1,null,'{"a":1,"b":[3,4,5],"c":{"x":4.5,"y":7.8}}'),
|
|
(2,null,'{"a":9,"b":[3,4,5],"c":{"x":4.5,"y":7.8}}');
|
|
SELECT * FROM t6
|
|
WHERE (EXISTS (SELECT 1 FROM json_each(t6.c) AS x WHERE x.value=1));
|
|
} {1 {} {{"a":1,"b":[3,4,5],"c":{"x":4.5,"y":7.8}}}}
|
|
|
|
# Another test case derived from a posting by Wout Mertens on the
|
|
# sqlite-users mailing list on 2017-10-04.
|
|
do_execsql_test 6.3 {
|
|
DROP TABLE IF EXISTS t;
|
|
CREATE TABLE t(json JSON);
|
|
SELECT * FROM t
|
|
WHERE(EXISTS(SELECT 1 FROM json_each(t.json,"$.foo") j
|
|
WHERE j.value = 'meep'));
|
|
} {}
|
|
do_execsql_test 6.4 {
|
|
INSERT INTO t VALUES('{"xyzzy":null}');
|
|
INSERT INTO t VALUES('{"foo":"meep","other":12345}');
|
|
INSERT INTO t VALUES('{"foo":"bingo","alt":5.25}');
|
|
SELECT * FROM t
|
|
WHERE(EXISTS(SELECT 1 FROM json_each(t.json,"$.foo") j
|
|
WHERE j.value = 'meep'));
|
|
} {{{"foo":"meep","other":12345}}}
|
|
}
|
|
|
|
# 2018-01-27
|
|
# Ticket https://sqlite.org/src/tktview/ec32177c99ccac2b180fd3ea2083
|
|
# Incorrect result when using the new OR clause factoring optimization
|
|
#
|
|
# This is the original test case as reported on the sqlite-users mailing
|
|
# list
|
|
#
|
|
do_execsql_test 7.1 {
|
|
DROP TABLE IF EXISTS cd;
|
|
CREATE TABLE cd ( cdid INTEGER PRIMARY KEY NOT NULL, genreid integer );
|
|
CREATE INDEX cd_idx_genreid ON cd (genreid);
|
|
INSERT INTO cd ( cdid, genreid ) VALUES
|
|
( 1, 1 ),
|
|
( 2, NULL ),
|
|
( 3, NULL ),
|
|
( 4, NULL ),
|
|
( 5, NULL );
|
|
|
|
SELECT cdid
|
|
FROM cd me
|
|
WHERE 2 > (
|
|
SELECT COUNT( * )
|
|
FROM cd rownum__emulation
|
|
WHERE
|
|
(
|
|
me.genreid IS NOT NULL
|
|
AND
|
|
rownum__emulation.genreid IS NULL
|
|
)
|
|
OR
|
|
(
|
|
me.genreid IS NOT NULL
|
|
AND
|
|
rownum__emulation.genreid IS NOT NULL
|
|
AND
|
|
rownum__emulation.genreid < me.genreid
|
|
)
|
|
OR
|
|
(
|
|
( me.genreid = rownum__emulation.genreid OR ( me.genreid IS NULL
|
|
AND rownum__emulation.genreid IS NULL ) )
|
|
AND
|
|
rownum__emulation.cdid > me.cdid
|
|
)
|
|
);
|
|
} {4 5}
|
|
|
|
# Simplified test cases from the ticket
|
|
#
|
|
do_execsql_test 7.2 {
|
|
DROP TABLE IF EXISTS t1;
|
|
DROP TABLE IF EXISTS t2;
|
|
CREATE TABLE t1(a INTEGER PRIMARY KEY, b);
|
|
INSERT INTO t1(a,b) VALUES(1,1);
|
|
CREATE TABLE t2(aa INTEGER PRIMARY KEY, bb);
|
|
INSERT INTO t2(aa,bb) VALUES(1,1),(2,NULL),(3,NULL);
|
|
SELECT (
|
|
SELECT COUNT(*) FROM t2
|
|
WHERE ( t1.b IS NOT NULL AND t2.bb IS NULL )
|
|
OR ( t2.bb < t1.b )
|
|
OR ( t1.b IS t2.bb AND t2.aa > t1.a )
|
|
)
|
|
FROM t1;
|
|
} {2}
|
|
|
|
# The fix for ticket ec32177c99ccac2b180fd3ea2083 only makes a difference
|
|
# in the output when there is a TERM_VNULL entry in the WhereClause array.
|
|
# And TERM_VNULL entries are only generated when compiling with
|
|
# SQLITE_ENABLE_STAT4. Nevertheless, it is correct that TERM_VIRTUAL terms
|
|
# should not participate in the factoring optimization. In all cases other
|
|
# than TERM_VNULL, participation is harmless, but it does consume a few
|
|
# extra CPU cycles.
|
|
#
|
|
# The following test verifies that the TERM_VIRTUAL terms resulting from
|
|
# a GLOB operator do not appear anywhere in the generated code. This
|
|
# confirms that the problem is fixed, even on builds that omit STAT4.
|
|
#
|
|
do_execsql_test 7.3 {
|
|
DROP TABLE IF EXISTS t1;
|
|
DROP TABLE IF EXISTS t2;
|
|
CREATE TABLE t1(a INTEGER PRIMARY KEY, b TEXT);
|
|
INSERT INTO t1(a,b) VALUES(1,'abcxyz');
|
|
CREATE TABLE t2(aa INTEGER PRIMARY KEY, bb TEXT);
|
|
INSERT INTO t2(aa,bb) VALUES(1,'abc'),(2,'wxyz'),(3,'xyz');
|
|
CREATE INDEX t2bb ON t2(bb);
|
|
EXPLAIN SELECT (
|
|
SELECT COUNT(*) FROM t2
|
|
WHERE ( t1.b GLOB 'a*z' AND t2.bb='xyz' )
|
|
OR ( t2.bb = t1.b )
|
|
OR ( t2.aa = t1.a )
|
|
)
|
|
FROM t1;
|
|
} {~/ (Lt|Ge) /}
|
|
|
|
finish_test
|