drh
0b150dd857
the count(*) optimization. Also backport check-in [a8761a9128de945aa] to prevent unordered indices from being used on a full table scan. The first backport was necessary in order to test the second. FossilOrigin-Name: 8d924e160703e02958db9c9bc1fd2c600e01e606
68 lines
2.3 KiB
Plaintext
68 lines
2.3 KiB
Plaintext
# 2011 April 9
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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.
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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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set testprefix unordered
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do_execsql_test 1.0 {
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CREATE TABLE t1(a, b);
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CREATE INDEX i1 ON t1(a);
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INSERT INTO t1 VALUES(1, 'xxx');
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INSERT INTO t1 SELECT a+1, b FROM t1;
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INSERT INTO t1 SELECT a+2, b FROM t1;
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INSERT INTO t1 SELECT a+4, b FROM t1;
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INSERT INTO t1 SELECT a+8, b FROM t1;
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INSERT INTO t1 SELECT a+16, b FROM t1;
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INSERT INTO t1 SELECT a+32, b FROM t1;
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INSERT INTO t1 SELECT a+64, b FROM t1;
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ANALYZE;
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} {}
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foreach idxmode {ordered unordered} {
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if {$idxmode == "unordered"} {
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execsql { UPDATE sqlite_stat1 SET stat = stat || ' unordered' }
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db close
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sqlite3 db test.db
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}
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foreach {tn sql r(ordered) r(unordered)} {
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1 "SELECT * FROM t1 ORDER BY a"
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{0 0 0 {SCAN TABLE t1 USING INDEX i1 (~128 rows)}}
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{0 0 0 {SCAN TABLE t1 (~128 rows)}}
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2 "SELECT * FROM t1 WHERE a >?"
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{0 0 0 {SEARCH TABLE t1 USING INDEX i1 (a>?) (~32 rows)}}
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{0 0 0 {SCAN TABLE t1 (~42 rows)}}
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3 "SELECT * FROM t1 WHERE a = ? ORDER BY rowid"
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{0 0 0 {SEARCH TABLE t1 USING INDEX i1 (a=?) (~1 rows)}}
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{0 0 0 {SEARCH TABLE t1 USING INDEX i1 (a=?) (~1 rows)}}
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4 "SELECT max(a) FROM t1"
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{0 0 0 {SEARCH TABLE t1 USING COVERING INDEX i1 (~1 rows)}}
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{0 0 0 {SEARCH TABLE t1 (~1 rows)}}
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5 "SELECT group_concat(b) FROM t1 GROUP BY a"
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{0 0 0 {SCAN TABLE t1 USING INDEX i1 (~128 rows)}}
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{0 0 0 {SCAN TABLE t1 (~128 rows)}}
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6 "SELECT * FROM t1 WHERE a = ?"
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{0 0 0 {SEARCH TABLE t1 USING INDEX i1 (a=?) (~1 rows)}}
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{0 0 0 {SEARCH TABLE t1 USING INDEX i1 (a=?) (~1 rows)}}
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7 "SELECT count(*) FROM t1"
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{0 0 0 {SCAN TABLE t1 USING COVERING INDEX i1(~128 rows)}}
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{0 0 0 {SCAN TABLE t1 (~128 rows)}}
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} {
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do_eqp_test 1.$idxmode.$tn $sql $r($idxmode)
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}
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}
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finish_test
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