290 lines
6.8 KiB
Plaintext
290 lines
6.8 KiB
Plaintext
# 2014-04-26
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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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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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set testprefix cost
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do_execsql_test 1.1 {
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CREATE TABLE t3(id INTEGER PRIMARY KEY, b NOT NULL);
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CREATE TABLE t4(c, d, e);
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CREATE UNIQUE INDEX i3 ON t3(b);
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CREATE UNIQUE INDEX i4 ON t4(c, d);
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}
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do_eqp_test 1.2 {
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SELECT e FROM t3, t4 WHERE b=c ORDER BY b, d;
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} {
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0 0 0 {SCAN TABLE t3 USING COVERING INDEX i3}
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0 1 1 {SEARCH TABLE t4 USING INDEX i4 (c=?)}
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}
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do_execsql_test 2.1 {
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CREATE TABLE t1(a, b);
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CREATE INDEX i1 ON t1(a);
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}
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# It is better to use an index for ORDER BY than sort externally, even
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# if the index is a non-covering index.
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do_eqp_test 2.2 {
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SELECT * FROM t1 ORDER BY a;
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} {
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0 0 0 {SCAN TABLE t1 USING INDEX i1}
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}
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do_execsql_test 3.1 {
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CREATE TABLE t5(a INTEGER PRIMARY KEY,b,c,d,e,f,g);
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CREATE INDEX t5b ON t5(b);
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CREATE INDEX t5c ON t5(c);
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CREATE INDEX t5d ON t5(d);
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CREATE INDEX t5e ON t5(e);
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CREATE INDEX t5f ON t5(f);
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CREATE INDEX t5g ON t5(g);
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}
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do_eqp_test 3.2 {
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SELECT a FROM t5
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WHERE b IS NULL OR c IS NULL OR d IS NULL
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ORDER BY a;
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} {
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0 0 0 {SEARCH TABLE t5 USING INDEX t5b (b=?)}
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0 0 0 {SEARCH TABLE t5 USING INDEX t5c (c=?)}
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0 0 0 {SEARCH TABLE t5 USING INDEX t5d (d=?)}
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0 0 0 {USE TEMP B-TREE FOR ORDER BY}
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}
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#-------------------------------------------------------------------------
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# If there is no likelihood() or stat3 data, SQLite assumes that a closed
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# range scan (e.g. one constrained by "col BETWEEN ? AND ?" constraint)
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# visits 1/64 of the rows in a table.
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#
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# Note: 1/63 =~ 0.016
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# Note: 1/65 =~ 0.015
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#
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reset_db
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do_execsql_test 4.1 {
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CREATE TABLE t1(a, b);
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CREATE INDEX i1 ON t1(a);
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CREATE INDEX i2 ON t1(b);
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}
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do_eqp_test 4.2 {
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SELECT * FROM t1 WHERE likelihood(a=?, 0.014) AND b BETWEEN ? AND ?;
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} {
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0 0 0 {SEARCH TABLE t1 USING INDEX i1 (a=?)}
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}
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do_eqp_test 4.3 {
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SELECT * FROM t1 WHERE likelihood(a=?, 0.016) AND b BETWEEN ? AND ?;
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} {
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0 0 0 {SEARCH TABLE t1 USING INDEX i2 (b>? AND b<?)}
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}
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#-------------------------------------------------------------------------
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#
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reset_db
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do_execsql_test 5.1 {
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CREATE TABLE t2(x, y);
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CREATE INDEX t2i1 ON t2(x);
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}
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do_eqp_test 5.2 {
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SELECT * FROM t2 ORDER BY x, y;
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} {
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0 0 0 {SCAN TABLE t2 USING INDEX t2i1}
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0 0 0 {USE TEMP B-TREE FOR RIGHT PART OF ORDER BY}
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}
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do_eqp_test 5.3 {
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SELECT * FROM t2 WHERE x BETWEEN ? AND ? ORDER BY rowid;
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} {
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0 0 0 {SEARCH TABLE t2 USING INDEX t2i1 (x>? AND x<?)}
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0 0 0 {USE TEMP B-TREE FOR ORDER BY}
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}
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# where7.test, where8.test:
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#
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do_execsql_test 6.1 {
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CREATE TABLE t3(a INTEGER PRIMARY KEY, b, c);
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CREATE INDEX t3i1 ON t3(b);
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CREATE INDEX t3i2 ON t3(c);
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}
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do_eqp_test 6.2 {
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SELECT a FROM t3 WHERE (b BETWEEN 2 AND 4) OR c=100 ORDER BY a
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} {
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0 0 0 {SEARCH TABLE t3 USING INDEX t3i1 (b>? AND b<?)}
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0 0 0 {SEARCH TABLE t3 USING INDEX t3i2 (c=?)}
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0 0 0 {USE TEMP B-TREE FOR ORDER BY}
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}
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#-------------------------------------------------------------------------
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#
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reset_db
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do_execsql_test 7.1 {
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CREATE TABLE t1(a INTEGER PRIMARY KEY,b,c,d,e,f,g);
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CREATE INDEX t1b ON t1(b);
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CREATE INDEX t1c ON t1(c);
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CREATE INDEX t1d ON t1(d);
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CREATE INDEX t1e ON t1(e);
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CREATE INDEX t1f ON t1(f);
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CREATE INDEX t1g ON t1(g);
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}
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do_eqp_test 7.2 {
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SELECT a FROM t1
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WHERE (b>=950 AND b<=1010) OR (b IS NULL AND c NOT NULL)
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ORDER BY a
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} {
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0 0 0 {SEARCH TABLE t1 USING INDEX t1b (b>? AND b<?)}
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0 0 0 {SEARCH TABLE t1 USING INDEX t1b (b=?)}
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0 0 0 {USE TEMP B-TREE FOR ORDER BY}
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}
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do_eqp_test 7.3 {
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SELECT rowid FROM t1
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WHERE (+b IS NULL AND c NOT NULL AND d NOT NULL)
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OR (b NOT NULL AND c IS NULL AND d NOT NULL)
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OR (b NOT NULL AND c NOT NULL AND d IS NULL)
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} {
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0 0 0 {SCAN TABLE t1}
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}
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do_eqp_test 7.4 {
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SELECT rowid FROM t1 WHERE (+b IS NULL AND c NOT NULL) OR c IS NULL
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} {
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0 0 0 {SCAN TABLE t1}
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}
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#-------------------------------------------------------------------------
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#
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reset_db
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do_execsql_test 8.1 {
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CREATE TABLE composer(
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cid INTEGER PRIMARY KEY,
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cname TEXT
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);
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CREATE TABLE album(
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aid INTEGER PRIMARY KEY,
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aname TEXT
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);
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CREATE TABLE track(
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tid INTEGER PRIMARY KEY,
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cid INTEGER REFERENCES composer,
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aid INTEGER REFERENCES album,
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title TEXT
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);
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CREATE INDEX track_i1 ON track(cid);
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CREATE INDEX track_i2 ON track(aid);
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}
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do_eqp_test 8.2 {
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SELECT DISTINCT aname
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FROM album, composer, track
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WHERE cname LIKE '%bach%'
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AND unlikely(composer.cid=track.cid)
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AND unlikely(album.aid=track.aid);
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} {
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0 0 2 {SCAN TABLE track}
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0 1 0 {SEARCH TABLE album USING INTEGER PRIMARY KEY (rowid=?)}
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0 2 1 {SEARCH TABLE composer USING INTEGER PRIMARY KEY (rowid=?)}
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0 0 0 {USE TEMP B-TREE FOR DISTINCT}
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}
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#-------------------------------------------------------------------------
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#
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do_execsql_test 9.1 {
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CREATE TABLE t1(
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a,b,c,d,e, f,g,h,i,j,
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k,l,m,n,o, p,q,r,s,t
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);
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CREATE INDEX i1 ON t1(k,l,m,n,o,p,q,r,s,t);
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}
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do_test 9.2 {
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for {set i 0} {$i < 100} {incr i} {
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execsql { INSERT INTO t1 DEFAULT VALUES }
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}
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execsql {
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ANALYZE;
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CREATE INDEX i2 ON t1(a,b,c,d,e,f,g,h,i,j);
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}
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} {}
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set L [list a=? b=? c=? d=? e=? f=? g=? h=? i=? j=?]
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foreach {tn nTerm nRow} {
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1 1 10
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2 2 9
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3 3 8
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4 4 7
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5 5 6
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6 6 5
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7 7 5
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8 8 5
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9 9 5
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10 10 5
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} {
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set w [join [lrange $L 0 [expr $nTerm-1]] " AND "]
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set p1 [expr ($nRow-1) / 100.0]
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set p2 [expr ($nRow+1) / 100.0]
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set sql1 "SELECT * FROM t1 WHERE likelihood(k=?, $p1) AND $w"
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set sql2 "SELECT * FROM t1 WHERE likelihood(k=?, $p2) AND $w"
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do_eqp_test 9.3.$tn.1 $sql1 {/INDEX i1/}
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do_eqp_test 9.3.$tn.2 $sql2 {/INDEX i2/}
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}
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#-------------------------------------------------------------------------
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#
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ifcapable stat4 {
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do_execsql_test 10.1 {
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CREATE TABLE t6(a, b, c);
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CREATE INDEX t6i1 ON t6(a, b);
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CREATE INDEX t6i2 ON t6(c);
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}
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do_test 10.2 {
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for {set i 0} {$i < 16} {incr i} {
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execsql { INSERT INTO t6 VALUES($i%4, 'xyz', $i%8) }
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}
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execsql ANALYZE
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} {}
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do_eqp_test 10.3 {
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SELECT rowid FROM t6 WHERE a=0 AND c=0
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} {
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0 0 0 {SEARCH TABLE t6 USING INDEX t6i2 (c=?)}
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}
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do_eqp_test 10.4 {
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SELECT rowid FROM t6 WHERE a=0 AND b='xyz' AND c=0
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} {
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0 0 0 {SEARCH TABLE t6 USING INDEX t6i2 (c=?)}
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}
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do_eqp_test 10.5 {
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SELECT rowid FROM t6 WHERE likelihood(a=0, 0.1) AND c=0
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} {
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0 0 0 {SEARCH TABLE t6 USING INDEX t6i1 (a=?)}
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}
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do_eqp_test 10.6 {
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SELECT rowid FROM t6 WHERE likelihood(a=0, 0.1) AND b='xyz' AND c=0
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} {
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0 0 0 {SEARCH TABLE t6 USING INDEX t6i1 (a=? AND b=?)}
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}
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}
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finish_test
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