drh
bb8a279e11
scripts as is practical. Fix a bug in the output limiter of the integrity_check pragma that came up while making this change. (CVS 4880) FossilOrigin-Name: 24e769972eb6052b82dc94d20444c186a213e104
140 lines
4.0 KiB
Plaintext
140 lines
4.0 KiB
Plaintext
# 2008 January 5
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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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# $Id: minmax3.test,v 1.2 2008/03/19 00:21:31 drh Exp $
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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# Do an SQL statement. Append the search count to the end of the result.
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#
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proc count sql {
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set ::sqlite_search_count 0
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return [concat [execsql $sql] $::sqlite_search_count]
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}
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# This procedure sets the value of the file-format in file 'test.db'
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# to $newval. Also, the schema cookie is incremented.
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#
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proc set_file_format {newval} {
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hexio_write test.db 44 [hexio_render_int32 $newval]
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set schemacookie [hexio_get_int [hexio_read test.db 40 4]]
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incr schemacookie
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hexio_write test.db 40 [hexio_render_int32 $schemacookie]
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return {}
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}
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do_test minmax3-1.0 {
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execsql {
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CREATE TABLE t1(x, y, z);
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}
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db close
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set_file_format 4
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sqlite3 db test.db
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execsql {
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BEGIN;
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INSERT INTO t1 VALUES('1', 'I', 'one');
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INSERT INTO t1 VALUES('2', 'IV', 'four');
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INSERT INTO t1 VALUES('2', NULL, 'three');
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INSERT INTO t1 VALUES('2', 'II', 'two');
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INSERT INTO t1 VALUES('2', 'V', 'five');
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INSERT INTO t1 VALUES('3', 'VI', 'six');
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COMMIT;
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}
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} {}
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do_test minmax3-1.1.1 {
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# Linear scan.
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count { SELECT max(y) FROM t1 WHERE x = '2'; }
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} {V 5}
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do_test minmax3-1.1.2 {
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# Index optimizes the WHERE x='2' constraint.
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execsql { CREATE INDEX i1 ON t1(x) }
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count { SELECT max(y) FROM t1 WHERE x = '2'; }
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} {V 9}
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do_test minmax3-1.1.3 {
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# Index optimizes the WHERE x='2' constraint and the MAX(y).
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execsql { CREATE INDEX i2 ON t1(x,y) }
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count { SELECT max(y) FROM t1 WHERE x = '2'; }
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} {V 1}
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do_test minmax3-1.1.4 {
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# Index optimizes the WHERE x='2' constraint and the MAX(y).
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execsql { DROP INDEX i2 ; CREATE INDEX i2 ON t1(x, y DESC) }
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count { SELECT max(y) FROM t1 WHERE x = '2'; }
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} {V 1}
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do_test minmax3-1.1.5 {
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count { SELECT max(y) FROM t1 WHERE x = '2' AND y != 'V'; }
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} {IV 2}
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do_test minmax3-1.1.6 {
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count { SELECT max(y) FROM t1 WHERE x = '2' AND y < 'V'; }
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} {IV 1}
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do_test minmax3-1.1.6 {
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count { SELECT max(y) FROM t1 WHERE x = '2' AND z != 'five'; }
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} {IV 4}
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do_test minmax3-1.2.1 {
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# Linear scan of t1.
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execsql { DROP INDEX i1 ; DROP INDEX i2 }
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count { SELECT min(y) FROM t1 WHERE x = '2'; }
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} {II 5}
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do_test minmax3-1.2.2 {
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# Index i1 optimizes the WHERE x='2' constraint.
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execsql { CREATE INDEX i1 ON t1(x) }
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count { SELECT min(y) FROM t1 WHERE x = '2'; }
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} {II 9}
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do_test minmax3-1.2.3 {
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# Index i2 optimizes the WHERE x='2' constraint and the min(y).
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execsql { CREATE INDEX i2 ON t1(x,y) }
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count { SELECT min(y) FROM t1 WHERE x = '2'; }
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} {II 1}
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do_test minmax3-1.2.4 {
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# Index optimizes the WHERE x='2' constraint and the MAX(y).
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execsql { DROP INDEX i2 ; CREATE INDEX i2 ON t1(x, y DESC) }
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count { SELECT min(y) FROM t1 WHERE x = '2'; }
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} {II 1}
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do_test minmax3-1.3.1 {
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# Linear scan
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execsql { DROP INDEX i1 ; DROP INDEX i2 }
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count { SELECT min(y) FROM t1; }
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} {I 5}
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do_test minmax3-1.3.2 {
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# Index i1 optimizes the min(y)
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execsql { CREATE INDEX i1 ON t1(y) }
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count { SELECT min(y) FROM t1; }
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} {I 1}
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do_test minmax3-1.3.3 {
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# Index i1 optimizes the min(y)
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execsql { DROP INDEX i1 ; CREATE INDEX i1 ON t1(y DESC) }
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count { SELECT min(y) FROM t1; }
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} {I 1}
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do_test minmax3-1.4.1 {
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# Linear scan
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execsql { DROP INDEX i1 }
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count { SELECT max(y) FROM t1; }
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} {VI 5}
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do_test minmax3-1.4.2 {
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# Index i1 optimizes the max(y)
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execsql { CREATE INDEX i1 ON t1(y) }
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count { SELECT max(y) FROM t1; }
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} {VI 0}
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do_test minmax3-1.4.3 {
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# Index i1 optimizes the max(y)
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execsql { DROP INDEX i1 ; CREATE INDEX i1 ON t1(y DESC) }
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execsql { SELECT y from t1}
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count { SELECT max(y) FROM t1; }
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} {VI 0}
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do_test minmax3-1.4.4 {
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execsql { DROP INDEX i1 }
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} {}
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finish_test
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