# 2014-04-26
#
# 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.
#
#***********************************************************************
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix cost
do_execsql_test 1.1 {
CREATE TABLE t3(id INTEGER PRIMARY KEY, b NOT NULL);
CREATE TABLE t4(c, d, e);
CREATE UNIQUE INDEX i3 ON t3(b);
CREATE UNIQUE INDEX i4 ON t4(c, d);
}
do_eqp_test 1.2 {
SELECT e FROM t3, t4 WHERE b=c ORDER BY b, d;
} {
0 0 0 {SCAN TABLE t3 USING COVERING INDEX i3}
0 1 1 {SEARCH TABLE t4 USING INDEX i4 (c=?)}
}
do_execsql_test 2.1 {
CREATE TABLE t1(a, b);
CREATE INDEX i1 ON t1(a);
}
# It is better to use an index for ORDER BY than sort externally, even
# if the index is a non-covering index.
do_eqp_test 2.2 {
SELECT * FROM t1 ORDER BY a;
} {
0 0 0 {SCAN TABLE t1 USING INDEX i1}
}
do_execsql_test 3.1 {
CREATE TABLE t5(a INTEGER PRIMARY KEY,b,c,d,e,f,g);
CREATE INDEX t5b ON t5(b);
CREATE INDEX t5c ON t5(c);
CREATE INDEX t5d ON t5(d);
CREATE INDEX t5e ON t5(e);
CREATE INDEX t5f ON t5(f);
CREATE INDEX t5g ON t5(g);
}
do_eqp_test 3.2 {
SELECT a FROM t5
WHERE b IS NULL OR c IS NULL OR d IS NULL
ORDER BY a;
} {
0 0 0 {SEARCH TABLE t5 USING INDEX t5b (b=?)}
0 0 0 {SEARCH TABLE t5 USING INDEX t5c (c=?)}
0 0 0 {SEARCH TABLE t5 USING INDEX t5d (d=?)}
0 0 0 {USE TEMP B-TREE FOR ORDER BY}
}
#-------------------------------------------------------------------------
# If there is no likelihood() or stat3 data, SQLite assumes that a closed
# range scan (e.g. one constrained by "col BETWEEN ? AND ?" constraint)
# visits 1/64 of the rows in a table.
#
# Note: 1/63 =~ 0.016
# Note: 1/65 =~ 0.015
#
reset_db
do_execsql_test 4.1 {
CREATE TABLE t1(a, b);
CREATE INDEX i1 ON t1(a);
CREATE INDEX i2 ON t1(b);
}
do_eqp_test 4.2 {
SELECT * FROM t1 WHERE likelihood(a=?, 0.014) AND b BETWEEN ? AND ?;
} {
0 0 0 {SEARCH TABLE t1 USING INDEX i1 (a=?)}
}
do_eqp_test 4.3 {
SELECT * FROM t1 WHERE likelihood(a=?, 0.016) AND b BETWEEN ? AND ?;
} {
0 0 0 {SEARCH TABLE t1 USING INDEX i2 (b>? AND b<?)}
}
#-------------------------------------------------------------------------
#
reset_db
do_execsql_test 5.1 {
CREATE TABLE t2(x, y);
CREATE INDEX t2i1 ON t2(x);
}
do_eqp_test 5.2 {
SELECT * FROM t2 ORDER BY x, y;
} {
0 0 0 {SCAN TABLE t2 USING INDEX t2i1}
0 0 0 {USE TEMP B-TREE FOR RIGHT PART OF ORDER BY}
}
do_eqp_test 5.3 {
SELECT * FROM t2 WHERE x BETWEEN ? AND ? ORDER BY rowid;
} {
0 0 0 {SEARCH TABLE t2 USING INDEX t2i1 (x>? AND x<?)}
0 0 0 {USE TEMP B-TREE FOR ORDER BY}
}
# where7.test, where8.test:
#
do_execsql_test 6.1 {
CREATE TABLE t3(a INTEGER PRIMARY KEY, b, c);
CREATE INDEX t3i1 ON t3(b);
CREATE INDEX t3i2 ON t3(c);
}
do_eqp_test 6.2 {
SELECT a FROM t3 WHERE (b BETWEEN 2 AND 4) OR c=100 ORDER BY a
} {
0 0 0 {SEARCH TABLE t3 USING INDEX t3i1 (b>? AND b<?)}
0 0 0 {SEARCH TABLE t3 USING INDEX t3i2 (c=?)}
0 0 0 {USE TEMP B-TREE FOR ORDER BY}
}
#-------------------------------------------------------------------------
#
reset_db
do_execsql_test 7.1 {
CREATE TABLE t1(a INTEGER PRIMARY KEY,b,c,d,e,f,g);
CREATE INDEX t1b ON t1(b);
CREATE INDEX t1c ON t1(c);
CREATE INDEX t1d ON t1(d);
CREATE INDEX t1e ON t1(e);
CREATE INDEX t1f ON t1(f);
CREATE INDEX t1g ON t1(g);
}
do_eqp_test 7.2 {
SELECT a FROM t1
WHERE (b>=950 AND b<=1010) OR (b IS NULL AND c NOT NULL)
ORDER BY a
} {
0 0 0 {SEARCH TABLE t1 USING INDEX t1b (b>? AND b<?)}
0 0 0 {SEARCH TABLE t1 USING INDEX t1b (b=?)}
0 0 0 {USE TEMP B-TREE FOR ORDER BY}
}
do_eqp_test 7.3 {
SELECT rowid FROM t1
WHERE (+b IS NULL AND c NOT NULL AND d NOT NULL)
OR (b NOT NULL AND c IS NULL AND d NOT NULL)
OR (b NOT NULL AND c NOT NULL AND d IS NULL)
} {
0 0 0 {SCAN TABLE t1}
}
do_eqp_test 7.4 {
SELECT rowid FROM t1 WHERE (+b IS NULL AND c NOT NULL) OR c IS NULL
} {
0 0 0 {SCAN TABLE t1}
}
#-------------------------------------------------------------------------
#
reset_db
do_execsql_test 8.1 {
CREATE TABLE composer(
cid INTEGER PRIMARY KEY,
cname TEXT
);
CREATE TABLE album(
aid INTEGER PRIMARY KEY,
aname TEXT
);
CREATE TABLE track(
tid INTEGER PRIMARY KEY,
cid INTEGER REFERENCES composer,
aid INTEGER REFERENCES album,
title TEXT
);
CREATE INDEX track_i1 ON track(cid);
CREATE INDEX track_i2 ON track(aid);
}
do_eqp_test 8.2 {
SELECT DISTINCT aname
FROM album, composer, track
WHERE cname LIKE '%bach%'
AND unlikely(composer.cid=track.cid)
AND unlikely(album.aid=track.aid);
} {
0 0 2 {SCAN TABLE track}
0 1 0 {SEARCH TABLE album USING INTEGER PRIMARY KEY (rowid=?)}
0 2 1 {SEARCH TABLE composer USING INTEGER PRIMARY KEY (rowid=?)}
0 0 0 {USE TEMP B-TREE FOR DISTINCT}
}
#-------------------------------------------------------------------------
#
do_execsql_test 9.1 {
CREATE TABLE t1(
a,b,c,d,e, f,g,h,i,j,
k,l,m,n,o, p,q,r,s,t
);
CREATE INDEX i1 ON t1(k,l,m,n,o,p,q,r,s,t);
}
do_test 9.2 {
for {set i 0} {$i < 100} {incr i} {
execsql { INSERT INTO t1 DEFAULT VALUES }
}
execsql {
ANALYZE;
CREATE INDEX i2 ON t1(a,b,c,d,e,f,g,h,i,j);
}
} {}
set L [list a=? b=? c=? d=? e=? f=? g=? h=? i=? j=?]
foreach {tn nTerm nRow} {
1 1 10
2 2 9
3 3 8
4 4 7
5 5 6
6 6 5
7 7 5
8 8 5
9 9 5
10 10 5
} {
set w [join [lrange $L 0 [expr $nTerm-1]] " AND "]
set p1 [expr ($nRow-1) / 100.0]
set p2 [expr ($nRow+1) / 100.0]
set sql1 "SELECT * FROM t1 WHERE likelihood(k=?, $p1) AND $w"
set sql2 "SELECT * FROM t1 WHERE likelihood(k=?, $p2) AND $w"
do_eqp_test 9.3.$tn.1 $sql1 {/INDEX i1/}
do_eqp_test 9.3.$tn.2 $sql2 {/INDEX i2/}
}
finish_test