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251 lines
7.8 KiB
Text
251 lines
7.8 KiB
Text
# 2010 April 07
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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 script is testing automatic index creation logic.
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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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# If the library is not compiled with automatic index support then
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# skip all tests in this file.
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#
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ifcapable {!autoindex} {
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finish_test
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return
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}
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# With automatic index turned off, we do a full scan of the T2 table
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do_test autoindex1-100 {
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db eval {
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CREATE TABLE t1(a,b);
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INSERT INTO t1 VALUES(1,11);
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INSERT INTO t1 VALUES(2,22);
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INSERT INTO t1 SELECT a+2, b+22 FROM t1;
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INSERT INTO t1 SELECT a+4, b+44 FROM t1;
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CREATE TABLE t2(c,d);
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INSERT INTO t2 SELECT a, 900+b FROM t1;
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}
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db eval {
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PRAGMA automatic_index=OFF;
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SELECT b, d FROM t1 JOIN t2 ON a=c ORDER BY b;
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}
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} {11 911 22 922 33 933 44 944 55 955 66 966 77 977 88 988}
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do_test autoindex1-101 {
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db status step
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} {63}
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do_test autoindex1-102 {
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db status autoindex
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} {0}
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# With autoindex turned on, we build an index once and then use that index
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# to find T2 values.
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do_test autoindex1-110 {
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db eval {
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PRAGMA automatic_index=ON;
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SELECT b, d FROM t1 JOIN t2 ON a=c ORDER BY b;
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}
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} {11 911 22 922 33 933 44 944 55 955 66 966 77 977 88 988}
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do_test autoindex1-111 {
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db status step
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} {7}
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do_test autoindex1-112 {
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db status autoindex
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} {7}
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# The same test as above, but this time the T2 query is a subquery rather
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# than a join.
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do_test autoindex1-200 {
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db eval {
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PRAGMA automatic_index=OFF;
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SELECT b, (SELECT d FROM t2 WHERE c=a) FROM t1;
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}
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} {11 911 22 922 33 933 44 944 55 955 66 966 77 977 88 988}
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do_test autoindex1-201 {
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db status step
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} {35}
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do_test autoindex1-202 {
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db status autoindex
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} {0}
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do_test autoindex1-210 {
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db eval {
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PRAGMA automatic_index=ON;
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SELECT b, (SELECT d FROM t2 WHERE c=a) FROM t1;
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}
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} {11 911 22 922 33 933 44 944 55 955 66 966 77 977 88 988}
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do_test autoindex1-211 {
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db status step
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} {7}
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do_test autoindex1-212 {
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db status autoindex
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} {7}
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# Modify the second table of the join while the join is in progress
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#
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do_test autoindex1-300 {
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set r {}
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db eval {SELECT b, d FROM t1 JOIN t2 ON (c=a)} {
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lappend r $b $d
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db eval {UPDATE t2 SET d=d+1}
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}
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set r
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} {11 911 22 922 33 933 44 944 55 955 66 966 77 977 88 988}
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do_test autoindex1-310 {
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db eval {SELECT d FROM t2 ORDER BY d}
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} {919 930 941 952 963 974 985 996}
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# The next test does a 10-way join on unindexed tables. Without
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# automatic indices, the join will take a long time to complete.
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# With automatic indices, it should only take about a second.
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#
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do_test autoindex1-400 {
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db eval {
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CREATE TABLE t4(a, b);
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INSERT INTO t4 VALUES(1,2);
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INSERT INTO t4 VALUES(2,3);
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}
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for {set n 2} {$n<4096} {set n [expr {$n+$n}]} {
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db eval {INSERT INTO t4 SELECT a+$n, b+$n FROM t4}
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}
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db eval {
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SELECT count(*) FROM t4;
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}
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} {4096}
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do_test autoindex1-401 {
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db eval {
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SELECT count(*)
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FROM t4 AS x1
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JOIN t4 AS x2 ON x2.a=x1.b
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JOIN t4 AS x3 ON x3.a=x2.b
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JOIN t4 AS x4 ON x4.a=x3.b
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JOIN t4 AS x5 ON x5.a=x4.b
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JOIN t4 AS x6 ON x6.a=x5.b
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JOIN t4 AS x7 ON x7.a=x6.b
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JOIN t4 AS x8 ON x8.a=x7.b
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JOIN t4 AS x9 ON x9.a=x8.b
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JOIN t4 AS x10 ON x10.a=x9.b;
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}
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} {4087}
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# Ticket [8011086c85c6c404014c947fcf3eb9f42b184a0d] from 2010-07-08
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# Make sure automatic indices are not created for the RHS of an IN expression
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# that is not a correlated subquery.
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#
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do_execsql_test autoindex1-500 {
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CREATE TABLE t501(a INTEGER PRIMARY KEY, b);
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CREATE TABLE t502(x INTEGER PRIMARY KEY, y);
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EXPLAIN QUERY PLAN
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SELECT b FROM t501
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WHERE t501.a IN (SELECT x FROM t502 WHERE y=?);
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} {
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0 0 0 {SEARCH TABLE t501 USING INTEGER PRIMARY KEY (rowid=?) (~25 rows)}
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0 0 0 {EXECUTE LIST SUBQUERY 1}
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1 0 0 {SCAN TABLE t502 (~100000 rows)}
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}
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do_execsql_test autoindex1-501 {
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EXPLAIN QUERY PLAN
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SELECT b FROM t501
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WHERE t501.a IN (SELECT x FROM t502 WHERE y=t501.b);
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} {
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0 0 0 {SCAN TABLE t501 (~500000 rows)}
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0 0 0 {EXECUTE CORRELATED LIST SUBQUERY 1}
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1 0 0 {SEARCH TABLE t502 USING AUTOMATIC COVERING INDEX (y=?) (~7 rows)}
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}
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do_execsql_test autoindex1-502 {
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EXPLAIN QUERY PLAN
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SELECT b FROM t501
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WHERE t501.a=123
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AND t501.a IN (SELECT x FROM t502 WHERE y=t501.b);
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} {
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0 0 0 {SEARCH TABLE t501 USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)}
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0 0 0 {EXECUTE CORRELATED LIST SUBQUERY 1}
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1 0 0 {SCAN TABLE t502 (~100000 rows)}
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}
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# The following code checks a performance regression reported on the
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# mailing list on 2010-10-19. The problem is that the nRowEst field
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# of ephermeral tables was not being initialized correctly and so no
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# automatic index was being created for the emphemeral table when it was
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# used as part of a join.
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#
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do_execsql_test autoindex1-600 {
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CREATE TABLE flock_owner(
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owner_rec_id INTEGER CONSTRAINT flock_owner_key PRIMARY KEY,
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flock_no VARCHAR(6) NOT NULL REFERENCES flock (flock_no),
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owner_person_id INTEGER NOT NULL REFERENCES person (person_id),
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owner_change_date TEXT, last_changed TEXT NOT NULL,
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CONSTRAINT fo_owner_date UNIQUE (flock_no, owner_change_date)
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);
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CREATE TABLE sheep (
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Sheep_No char(7) NOT NULL,
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Date_of_Birth char(8),
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Sort_DoB text,
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Flock_Book_Vol char(2),
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Breeder_No char(6),
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Breeder_Person integer,
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Originating_Flock char(6),
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Registering_Flock char(6),
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Tag_Prefix char(9),
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Tag_No char(15),
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Sort_Tag_No integer,
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Breeders_Temp_Tag char(15),
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Sex char(1),
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Sheep_Name char(32),
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Sire_No char(7),
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Dam_No char(7),
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Register_Code char(1),
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Colour char(48),
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Colour_Code char(2),
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Pattern_Code char(8),
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Horns char(1),
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Litter_Size char(1),
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Coeff_of_Inbreeding real,
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Date_of_Registration text,
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Date_Last_Changed text,
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UNIQUE(Sheep_No));
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CREATE INDEX fo_flock_no_index
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ON flock_owner (flock_no);
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CREATE INDEX fo_owner_change_date_index
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ON flock_owner (owner_change_date);
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CREATE INDEX fo_owner_person_id_index
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ON flock_owner (owner_person_id);
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CREATE INDEX sheep_org_flock_index
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ON sheep (originating_flock);
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CREATE INDEX sheep_reg_flock_index
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ON sheep (registering_flock);
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EXPLAIN QUERY PLAN
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SELECT x.sheep_no, x.registering_flock, x.date_of_registration
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FROM sheep x LEFT JOIN
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(SELECT s.sheep_no, prev.flock_no, prev.owner_person_id,
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s.date_of_registration, prev.owner_change_date
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FROM sheep s JOIN flock_owner prev ON s.registering_flock =
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prev.flock_no
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AND (prev.owner_change_date <= s.date_of_registration || ' 00:00:00')
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WHERE NOT EXISTS
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(SELECT 'x' FROM flock_owner later
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WHERE prev.flock_no = later.flock_no
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AND later.owner_change_date > prev.owner_change_date
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AND later.owner_change_date <= s.date_of_registration||' 00:00:00')
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) y ON x.sheep_no = y.sheep_no
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WHERE y.sheep_no IS NULL
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ORDER BY x.registering_flock;
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} {
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1 0 0 {SCAN TABLE sheep AS s (~1000000 rows)}
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1 1 1 {SEARCH TABLE flock_owner AS prev USING INDEX sqlite_autoindex_flock_owner_1 (flock_no=? AND owner_change_date<?) (~2 rows)}
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1 0 0 {EXECUTE CORRELATED SCALAR SUBQUERY 2}
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2 0 0 {SEARCH TABLE flock_owner AS later USING COVERING INDEX sqlite_autoindex_flock_owner_1 (flock_no=? AND owner_change_date>? AND owner_change_date<?) (~1 rows)}
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0 0 0 {SCAN TABLE sheep AS x USING INDEX sheep_reg_flock_index (~1000000 rows)}
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0 1 1 {SEARCH SUBQUERY 1 AS y USING AUTOMATIC COVERING INDEX (sheep_no=?) (~8 rows)}
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}
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finish_test
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