439 lines
14 KiB
Plaintext
439 lines
14 KiB
Plaintext
# 2006 January 31
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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 the join reordering optimization
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# in cases that include a LEFT JOIN.
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#
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# $Id: where3.test,v 1.4 2008/04/17 19:14:02 drh Exp $
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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# The following is from ticket #1652.
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#
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# A comma join then a left outer join: A,B left join C.
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# Arrange indices so that the B table is chosen to go first.
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# Also put an index on C, but make sure that A is chosen before C.
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#
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do_test where3-1.1 {
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execsql {
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CREATE TABLE t1(a, b);
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CREATE TABLE t2(p, q);
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CREATE TABLE t3(x, y);
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INSERT INTO t1 VALUES(111,'one');
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INSERT INTO t1 VALUES(222,'two');
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INSERT INTO t1 VALUES(333,'three');
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INSERT INTO t2 VALUES(1,111);
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INSERT INTO t2 VALUES(2,222);
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INSERT INTO t2 VALUES(4,444);
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CREATE INDEX t2i1 ON t2(p);
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INSERT INTO t3 VALUES(999,'nine');
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CREATE INDEX t3i1 ON t3(x);
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SELECT * FROM t1, t2 LEFT JOIN t3 ON q=x WHERE p=2 AND a=q;
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}
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} {222 two 2 222 {} {}}
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ifcapable explain {
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do_test where3-1.1.1 {
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explain_no_trace {SELECT * FROM t1, t2 LEFT JOIN t3 ON q=x
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WHERE p=2 AND a=q}
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} [explain_no_trace {SELECT * FROM t1, t2 LEFT JOIN t3 ON x=q
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WHERE p=2 AND a=q}]
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}
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# Ticket #1830
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#
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# This is similar to the above but with the LEFT JOIN on the
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# other side.
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#
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do_test where3-1.2 {
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execsql {
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CREATE TABLE parent1(parent1key, child1key, Child2key, child3key);
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CREATE TABLE child1 ( child1key NVARCHAR, value NVARCHAR );
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CREATE UNIQUE INDEX PKIDXChild1 ON child1 ( child1key );
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CREATE TABLE child2 ( child2key NVARCHAR, value NVARCHAR );
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INSERT INTO parent1(parent1key,child1key,child2key)
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VALUES ( 1, 'C1.1', 'C2.1' );
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INSERT INTO child1 ( child1key, value ) VALUES ( 'C1.1', 'Value for C1.1' );
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INSERT INTO child2 ( child2key, value ) VALUES ( 'C2.1', 'Value for C2.1' );
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INSERT INTO parent1 ( parent1key, child1key, child2key )
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VALUES ( 2, 'C1.2', 'C2.2' );
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INSERT INTO child2 ( child2key, value ) VALUES ( 'C2.2', 'Value for C2.2' );
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INSERT INTO parent1 ( parent1key, child1key, child2key )
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VALUES ( 3, 'C1.3', 'C2.3' );
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INSERT INTO child1 ( child1key, value ) VALUES ( 'C1.3', 'Value for C1.3' );
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INSERT INTO child2 ( child2key, value ) VALUES ( 'C2.3', 'Value for C2.3' );
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SELECT parent1.parent1key, child1.value, child2.value
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FROM parent1
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LEFT OUTER JOIN child1 ON child1.child1key = parent1.child1key
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INNER JOIN child2 ON child2.child2key = parent1.child2key;
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}
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} {1 {Value for C1.1} {Value for C2.1} 2 {} {Value for C2.2} 3 {Value for C1.3} {Value for C2.3}}
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ifcapable explain {
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do_test where3-1.2.1 {
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explain_no_trace {
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SELECT parent1.parent1key, child1.value, child2.value
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FROM parent1
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LEFT OUTER JOIN child1 ON child1.child1key = parent1.child1key
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INNER JOIN child2 ON child2.child2key = parent1.child2key;
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}
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} [explain_no_trace {
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SELECT parent1.parent1key, child1.value, child2.value
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FROM parent1
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LEFT OUTER JOIN child1 ON parent1.child1key = child1.child1key
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INNER JOIN child2 ON child2.child2key = parent1.child2key;
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}]
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}
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# This procedure executes the SQL. Then it appends
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# the names of the table and index used
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#
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proc queryplan {sql} {
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set ::sqlite_sort_count 0
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set data [execsql $sql]
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set eqp [execsql "EXPLAIN QUERY PLAN $sql"]
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# puts eqp=$eqp
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foreach {a b c x} $eqp {
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if {[regexp { TABLE (\w+ AS )?(\w+) USING.* INDEX (\w+)\W} \
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$x all as tab idx]} {
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lappend data $tab $idx
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} elseif {[regexp { TABLE (\w+ AS )?(\w+)\W} $x all as tab]} {
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lappend data $tab *
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}
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}
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return $data
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}
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# If you have a from clause of the form: A B C left join D
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# then make sure the query optimizer is able to reorder the
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# A B C part anyway it wants.
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#
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# Following the fix to ticket #1652, there was a time when
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# the C table would not reorder. So the following reorderings
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# were possible:
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#
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# A B C left join D
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# B A C left join D
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#
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# But these reorders were not allowed
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#
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# C A B left join D
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# A C B left join D
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# C B A left join D
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# B C A left join D
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#
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# The following tests are here to verify that the latter four
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# reorderings are allowed again.
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#
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do_test where3-2.1 {
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execsql {
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CREATE TABLE tA(apk integer primary key, ax);
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CREATE TABLE tB(bpk integer primary key, bx);
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CREATE TABLE tC(cpk integer primary key, cx);
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CREATE TABLE tD(dpk integer primary key, dx);
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}
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queryplan {
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SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx
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WHERE cpk=bx AND bpk=ax
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}
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} {tA * tB * tC * tD *}
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do_test where3-2.1.1 {
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queryplan {
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SELECT * FROM tA, tB, tC LEFT JOIN tD ON cx=dpk
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WHERE cpk=bx AND bpk=ax
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}
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} {tA * tB * tC * tD *}
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do_test where3-2.1.2 {
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queryplan {
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SELECT * FROM tA, tB, tC LEFT JOIN tD ON cx=dpk
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WHERE bx=cpk AND bpk=ax
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}
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} {tA * tB * tC * tD *}
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do_test where3-2.1.3 {
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queryplan {
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SELECT * FROM tA, tB, tC LEFT JOIN tD ON cx=dpk
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WHERE bx=cpk AND ax=bpk
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}
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} {tA * tB * tC * tD *}
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do_test where3-2.1.4 {
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queryplan {
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SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx
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WHERE bx=cpk AND ax=bpk
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}
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} {tA * tB * tC * tD *}
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do_test where3-2.1.5 {
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queryplan {
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SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx
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WHERE cpk=bx AND ax=bpk
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}
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} {tA * tB * tC * tD *}
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do_test where3-2.2 {
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queryplan {
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SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx
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WHERE cpk=bx AND apk=bx
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}
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} {tB {} tA * tC * tD *}
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do_test where3-2.3 {
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queryplan {
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SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx
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WHERE cpk=bx AND apk=bx
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}
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} {tB {} tA * tC * tD *}
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do_test where3-2.4 {
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queryplan {
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SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx
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WHERE apk=cx AND bpk=ax
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}
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} {tC {} tA * tB * tD *}
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do_test where3-2.5 {
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queryplan {
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SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx
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WHERE cpk=ax AND bpk=cx
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}
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} {tA {} tC * tB * tD *}
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do_test where3-2.6 {
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queryplan {
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SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx
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WHERE bpk=cx AND apk=bx
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}
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} {tC {} tB * tA * tD *}
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do_test where3-2.7 {
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queryplan {
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SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx
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WHERE cpk=bx AND apk=cx
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}
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} {tB {} tC * tA * tD *}
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# Ticket [13f033c865f878953]
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# If the outer loop must be a full table scan, do not let ANALYZE trick
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# the planner into use a table for the outer loop that might be indexable
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# if held until an inner loop.
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#
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do_execsql_test where3-3.0 {
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CREATE TABLE t301(a INTEGER PRIMARY KEY,b,c);
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CREATE INDEX t301c ON t301(c);
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INSERT INTO t301 VALUES(1,2,3);
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CREATE TABLE t302(x, y);
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INSERT INTO t302 VALUES(4,5);
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ANALYZE;
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explain query plan SELECT * FROM t302, t301 WHERE t302.x=5 AND t301.a=t302.y;
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} {
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0 0 0 {SCAN TABLE t302 (~1 rows)}
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0 1 1 {SEARCH TABLE t301 USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)}
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}
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do_execsql_test where3-3.1 {
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explain query plan
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SELECT * FROM t301, t302 WHERE t302.x=5 AND t301.a=t302.y;
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} {
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0 0 1 {SCAN TABLE t302 (~1 rows)}
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0 1 0 {SEARCH TABLE t301 USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)}
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}
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# Verify that when there are multiple tables in a join which must be
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# full table scans that the query planner attempts put the table with
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# the fewest number of output rows as the outer loop.
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#
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do_execsql_test where3-4.0 {
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CREATE TABLE t400(a INTEGER PRIMARY KEY, b, c);
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CREATE TABLE t401(p INTEGER PRIMARY KEY, q, r);
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CREATE TABLE t402(x INTEGER PRIMARY KEY, y, z);
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EXPLAIN QUERY PLAN
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SELECT * FROM t400, t401, t402 WHERE t402.z GLOB 'abc*';
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} {
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0 0 2 {SCAN TABLE t402 (~500000 rows)}
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0 1 0 {SCAN TABLE t400 (~1000000 rows)}
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0 2 1 {SCAN TABLE t401 (~1000000 rows)}
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}
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do_execsql_test where3-4.1 {
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EXPLAIN QUERY PLAN
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SELECT * FROM t400, t401, t402 WHERE t401.r GLOB 'abc*';
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} {
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0 0 1 {SCAN TABLE t401 (~500000 rows)}
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0 1 0 {SCAN TABLE t400 (~1000000 rows)}
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0 2 2 {SCAN TABLE t402 (~1000000 rows)}
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}
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do_execsql_test where3-4.2 {
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EXPLAIN QUERY PLAN
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SELECT * FROM t400, t401, t402 WHERE t400.c GLOB 'abc*';
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} {
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0 0 0 {SCAN TABLE t400 (~500000 rows)}
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0 1 1 {SCAN TABLE t401 (~1000000 rows)}
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0 2 2 {SCAN TABLE t402 (~1000000 rows)}
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}
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# Verify that a performance regression encountered by firefox
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# has been fixed.
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#
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do_execsql_test where3-5.0 {
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CREATE TABLE aaa (id INTEGER PRIMARY KEY, type INTEGER,
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fk INTEGER DEFAULT NULL, parent INTEGER,
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position INTEGER, title LONGVARCHAR,
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keyword_id INTEGER, folder_type TEXT,
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dateAdded INTEGER, lastModified INTEGER);
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CREATE INDEX aaa_111 ON aaa (fk, type);
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CREATE INDEX aaa_222 ON aaa (parent, position);
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CREATE INDEX aaa_333 ON aaa (fk, lastModified);
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CREATE TABLE bbb (id INTEGER PRIMARY KEY, type INTEGER,
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fk INTEGER DEFAULT NULL, parent INTEGER,
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position INTEGER, title LONGVARCHAR,
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keyword_id INTEGER, folder_type TEXT,
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dateAdded INTEGER, lastModified INTEGER);
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CREATE INDEX bbb_111 ON bbb (fk, type);
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CREATE INDEX bbb_222 ON bbb (parent, position);
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CREATE INDEX bbb_333 ON bbb (fk, lastModified);
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EXPLAIN QUERY PLAN
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SELECT bbb.title AS tag_title
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FROM aaa JOIN bbb ON bbb.id = aaa.parent
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WHERE aaa.fk = 'constant'
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AND LENGTH(bbb.title) > 0
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AND bbb.parent = 4
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ORDER BY bbb.title COLLATE NOCASE ASC;
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} {
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0 0 0 {SEARCH TABLE aaa USING INDEX aaa_333 (fk=?) (~10 rows)}
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0 1 1 {SEARCH TABLE bbb USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)}
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0 0 0 {USE TEMP B-TREE FOR ORDER BY}
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}
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do_execsql_test where3-5.1 {
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EXPLAIN QUERY PLAN
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SELECT bbb.title AS tag_title
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FROM aaa JOIN aaa AS bbb ON bbb.id = aaa.parent
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WHERE aaa.fk = 'constant'
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AND LENGTH(bbb.title) > 0
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AND bbb.parent = 4
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ORDER BY bbb.title COLLATE NOCASE ASC;
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} {
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0 0 0 {SEARCH TABLE aaa USING INDEX aaa_333 (fk=?) (~10 rows)}
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0 1 1 {SEARCH TABLE aaa AS bbb USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)}
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0 0 0 {USE TEMP B-TREE FOR ORDER BY}
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}
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do_execsql_test where3-5.2 {
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EXPLAIN QUERY PLAN
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SELECT bbb.title AS tag_title
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FROM bbb JOIN aaa ON bbb.id = aaa.parent
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WHERE aaa.fk = 'constant'
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AND LENGTH(bbb.title) > 0
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AND bbb.parent = 4
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ORDER BY bbb.title COLLATE NOCASE ASC;
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} {
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0 0 1 {SEARCH TABLE aaa USING INDEX aaa_333 (fk=?) (~10 rows)}
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0 1 0 {SEARCH TABLE bbb USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)}
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0 0 0 {USE TEMP B-TREE FOR ORDER BY}
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}
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do_execsql_test where3-5.3 {
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EXPLAIN QUERY PLAN
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SELECT bbb.title AS tag_title
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FROM aaa AS bbb JOIN aaa ON bbb.id = aaa.parent
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WHERE aaa.fk = 'constant'
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AND LENGTH(bbb.title) > 0
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AND bbb.parent = 4
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ORDER BY bbb.title COLLATE NOCASE ASC;
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} {
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0 0 1 {SEARCH TABLE aaa USING INDEX aaa_333 (fk=?) (~10 rows)}
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0 1 0 {SEARCH TABLE aaa AS bbb USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)}
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0 0 0 {USE TEMP B-TREE FOR ORDER BY}
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}
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# Name resolution with NATURAL JOIN and USING
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#
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do_test where3-6.setup {
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db eval {
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CREATE TABLE t6w(a, w);
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INSERT INTO t6w VALUES(1, 'w-one');
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INSERT INTO t6w VALUES(2, 'w-two');
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INSERT INTO t6w VALUES(9, 'w-nine');
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CREATE TABLE t6x(a, x);
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INSERT INTO t6x VALUES(1, 'x-one');
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INSERT INTO t6x VALUES(3, 'x-three');
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INSERT INTO t6x VALUES(9, 'x-nine');
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CREATE TABLE t6y(a, y);
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INSERT INTO t6y VALUES(1, 'y-one');
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INSERT INTO t6y VALUES(4, 'y-four');
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INSERT INTO t6y VALUES(9, 'y-nine');
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CREATE TABLE t6z(a, z);
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INSERT INTO t6z VALUES(1, 'z-one');
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INSERT INTO t6z VALUES(5, 'z-five');
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INSERT INTO t6z VALUES(9, 'z-nine');
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}
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} {}
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set cnt 0
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foreach predicate {
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{}
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{ORDER BY a}
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{ORDER BY t6w.a}
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{WHERE a>0}
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{WHERE t6y.a>0}
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{WHERE a>0 ORDER BY a}
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} {
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incr cnt
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do_test where3-6.$cnt.1 {
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set sql "SELECT * FROM t6w NATURAL JOIN t6x NATURAL JOIN t6y"
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append sql " NATURAL JOIN t6z "
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append sql $::predicate
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db eval $sql
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} {1 w-one x-one y-one z-one 9 w-nine x-nine y-nine z-nine}
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do_test where3-6.$cnt.2 {
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set sql "SELECT * FROM t6w JOIN t6x USING(a) JOIN t6y USING(a)"
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append sql " JOIN t6z USING(a) "
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append sql $::predicate
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db eval $sql
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} {1 w-one x-one y-one z-one 9 w-nine x-nine y-nine z-nine}
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do_test where3-6.$cnt.3 {
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set sql "SELECT * FROM t6w NATURAL JOIN t6x JOIN t6y USING(a)"
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append sql " JOIN t6z USING(a) "
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append sql $::predicate
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db eval $sql
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} {1 w-one x-one y-one z-one 9 w-nine x-nine y-nine z-nine}
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do_test where3-6.$cnt.4 {
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set sql "SELECT * FROM t6w JOIN t6x USING(a) NATURAL JOIN t6y"
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append sql " JOIN t6z USING(a) "
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append sql $::predicate
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db eval $sql
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} {1 w-one x-one y-one z-one 9 w-nine x-nine y-nine z-nine}
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do_test where3-6.$cnt.5 {
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set sql "SELECT * FROM t6w JOIN t6x USING(a) JOIN t6y USING(a)"
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append sql " NATURAL JOIN t6z "
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append sql $::predicate
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db eval $sql
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} {1 w-one x-one y-one z-one 9 w-nine x-nine y-nine z-nine}
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do_test where3-6.$cnt.6 {
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set sql "SELECT * FROM t6w JOIN t6x USING(a) NATURAL JOIN t6y"
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append sql " NATURAL JOIN t6z "
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append sql $::predicate
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db eval $sql
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} {1 w-one x-one y-one z-one 9 w-nine x-nine y-nine z-nine}
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do_test where3-6.$cnt.7 {
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set sql "SELECT * FROM t6w NATURAL JOIN t6x JOIN t6y USING(a)"
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append sql " NATURAL JOIN t6z "
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append sql $::predicate
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db eval $sql
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} {1 w-one x-one y-one z-one 9 w-nine x-nine y-nine z-nine}
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do_test where3-6.$cnt.8 {
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set sql "SELECT * FROM t6w NATURAL JOIN t6x NATURAL JOIN t6y"
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append sql " JOIN t6z USING(a) "
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append sql $::predicate
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db eval $sql
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} {1 w-one x-one y-one z-one 9 w-nine x-nine y-nine z-nine}
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}
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finish_test
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