308 lines
8.4 KiB
Plaintext
308 lines
8.4 KiB
Plaintext
# 2006 October 27
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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 file is testing the use of indices in WHERE clauses.
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# This file was created when support for optimizing IS NULL phrases
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# was added. And so the principle purpose of this file is to test
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# that IS NULL phrases are correctly optimized. But you can never
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# have too many tests, so some other tests are thrown in as well.
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#
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# $Id: where4.test,v 1.6 2007/12/10 05:03:48 danielk1977 Exp $
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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set testprefix where4
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ifcapable !tclvar||!bloblit {
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finish_test
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return
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}
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# Build some test data
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#
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do_test where4-1.0 {
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execsql {
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CREATE TABLE t1(w, x, y);
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CREATE INDEX i1wxy ON t1(w,x,y);
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INSERT INTO t1 VALUES(1,2,3);
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INSERT INTO t1 VALUES(1,NULL,3);
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INSERT INTO t1 VALUES('a','b','c');
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INSERT INTO t1 VALUES('a',NULL,'c');
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INSERT INTO t1 VALUES(X'78',x'79',x'7a');
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INSERT INTO t1 VALUES(X'78',NULL,X'7A');
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INSERT INTO t1 VALUES(NULL,NULL,NULL);
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SELECT count(*) FROM t1;
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}
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} {7}
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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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# Verify that queries use an index. We are using the special variable
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# "sqlite_search_count" which tallys the number of executions of MoveTo
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# and Next operators in the VDBE. By verifing that the search count is
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# small we can be assured that indices are being used properly.
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#
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do_test where4-1.1 {
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count {SELECT rowid FROM t1 WHERE w IS NULL}
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} {7 2}
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do_test where4-1.1b {
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unset -nocomplain null
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count {SELECT rowid FROM t1 WHERE w IS $null}
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} {7 2}
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do_test where4-1.2 {
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count {SELECT rowid FROM t1 WHERE +w IS NULL}
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} {7 6}
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do_test where4-1.3 {
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count {SELECT rowid FROM t1 WHERE w=1 AND x IS NULL}
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} {2 2}
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do_test where4-1.4 {
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count {SELECT rowid FROM t1 WHERE w=1 AND +x IS NULL}
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} {2 3}
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do_test where4-1.5 {
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count {SELECT rowid FROM t1 WHERE w=1 AND x>0}
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} {1 2}
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do_test where4-1.6 {
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count {SELECT rowid FROM t1 WHERE w=1 AND x<9}
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} {1 2}
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do_test where4-1.7 {
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count {SELECT rowid FROM t1 WHERE w=1 AND x IS NULL AND y=3}
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} {2 2}
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do_test where4-1.8 {
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count {SELECT rowid FROM t1 WHERE w=1 AND x IS NULL AND y>2}
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} {2 2}
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do_test where4-1.9 {
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count {SELECT rowid FROM t1 WHERE w='a' AND x IS NULL AND y='c'}
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} {4 2}
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do_test where4-1.10 {
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count {SELECT rowid FROM t1 WHERE w=x'78' AND x IS NULL}
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} {6 2}
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do_test where4-1.11 {
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count {SELECT rowid FROM t1 WHERE w=x'78' AND x IS NULL AND y=123}
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} {1}
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do_test where4-1.12 {
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count {SELECT rowid FROM t1 WHERE w=x'78' AND x IS NULL AND y=x'7A'}
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} {6 2}
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do_test where4-1.13 {
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count {SELECT rowid FROM t1 WHERE w IS NULL AND x IS NULL}
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} {7 2}
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do_test where4-1.14 {
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count {SELECT rowid FROM t1 WHERE w IS NULL AND x IS NULL AND y IS NULL}
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} {7 2}
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do_test where4-1.15 {
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count {SELECT rowid FROM t1 WHERE w IS NULL AND x IS NULL AND y<0}
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} {1}
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do_test where4-1.16 {
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count {SELECT rowid FROM t1 WHERE w IS NULL AND x IS NULL AND y>=0}
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} {1}
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do_test where4-2.1 {
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execsql {SELECT rowid FROM t1 ORDER BY w, x, y}
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} {7 2 1 4 3 6 5}
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do_test where4-2.2 {
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execsql {SELECT rowid FROM t1 ORDER BY w DESC, x, y}
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} {6 5 4 3 2 1 7}
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do_test where4-2.3 {
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execsql {SELECT rowid FROM t1 ORDER BY w, x DESC, y}
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} {7 1 2 3 4 5 6}
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# Ticket #2177
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#
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# Suppose you have a left join where the right table of the left
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# join (the one that can be NULL) has an index on two columns.
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# The first indexed column is used in the ON clause of the join.
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# The second indexed column is used in the WHERE clause with an IS NULL
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# constraint. It is not allowed to use the IS NULL optimization to
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# optimize the query because the second column might be NULL because
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# the right table did not match - something the index does not know
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# about.
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#
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do_test where4-3.1 {
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execsql {
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CREATE TABLE t2(a);
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INSERT INTO t2 VALUES(1);
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INSERT INTO t2 VALUES(2);
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INSERT INTO t2 VALUES(3);
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CREATE TABLE t3(x,y,UNIQUE(x,y));
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INSERT INTO t3 VALUES(1,11);
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INSERT INTO t3 VALUES(2,NULL);
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SELECT * FROM t2 LEFT JOIN t3 ON a=x WHERE +y IS NULL;
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}
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} {2 2 {} 3 {} {}}
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do_test where4-3.2 {
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execsql {
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SELECT * FROM t2 LEFT JOIN t3 ON a=x WHERE y IS NULL;
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}
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} {2 2 {} 3 {} {}}
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do_test where4-3.3 {
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execsql {
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SELECT * FROM t2 LEFT JOIN t3 ON a=x WHERE NULL is y;
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}
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} {2 2 {} 3 {} {}}
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do_test where4-3.4 {
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unset -nocomplain null
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execsql {
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SELECT * FROM t2 LEFT JOIN t3 ON a=x WHERE y IS $null;
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}
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} {2 2 {} 3 {} {}}
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# Ticket #2189. Probably the same bug as #2177.
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#
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do_test where4-4.1 {
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execsql {
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CREATE TABLE test(col1 TEXT PRIMARY KEY);
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INSERT INTO test(col1) values('a');
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INSERT INTO test(col1) values('b');
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INSERT INTO test(col1) values('c');
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CREATE TABLE test2(col1 TEXT PRIMARY KEY);
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INSERT INTO test2(col1) values('a');
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INSERT INTO test2(col1) values('b');
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INSERT INTO test2(col1) values('c');
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SELECT * FROM test t1 LEFT OUTER JOIN test2 t2 ON t1.col1 = t2.col1
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WHERE +t2.col1 IS NULL;
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}
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} {}
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do_test where4-4.2 {
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execsql {
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SELECT * FROM test t1 LEFT OUTER JOIN test2 t2 ON t1.col1 = t2.col1
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WHERE t2.col1 IS NULL;
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}
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} {}
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do_test where4-4.3 {
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execsql {
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SELECT * FROM test t1 LEFT OUTER JOIN test2 t2 ON t1.col1 = t2.col1
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WHERE +t1.col1 IS NULL;
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}
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} {}
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do_test where4-4.4 {
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execsql {
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SELECT * FROM test t1 LEFT OUTER JOIN test2 t2 ON t1.col1 = t2.col1
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WHERE t1.col1 IS NULL;
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}
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} {}
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# Ticket #2273. Problems with IN operators and NULLs.
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#
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ifcapable subquery {
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do_test where4-5.1 {
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execsql {
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CREATE TABLE t4(x,y,z,PRIMARY KEY(x,y));
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}
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execsql {
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SELECT *
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FROM t2 LEFT JOIN t4 b1
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LEFT JOIN t4 b2 ON b2.x=b1.x AND b2.y IN (b1.y);
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}
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} {1 {} {} {} {} {} {} 2 {} {} {} {} {} {} 3 {} {} {} {} {} {}}
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do_test where4-5.2 {
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execsql {
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INSERT INTO t4 VALUES(1,1,11);
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INSERT INTO t4 VALUES(1,2,12);
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INSERT INTO t4 VALUES(1,3,13);
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INSERT INTO t4 VALUES(2,2,22);
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SELECT rowid FROM t4 WHERE x IN (1,9,2,5) AND y IN (1,3,NULL,2) AND z!=13;
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}
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} {1 2 4}
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do_test where4-5.3 {
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execsql {
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SELECT rowid FROM t4 WHERE x IN (1,9,NULL,2) AND y IN (1,3,2) AND z!=13;
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}
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} {1 2 4}
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do_test where4-6.1 {
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execsql {
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CREATE TABLE t5(a,b,c,d,e,f,UNIQUE(a,b,c,d,e,f));
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INSERT INTO t5 VALUES(1,1,1,1,1,11111);
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INSERT INTO t5 VALUES(2,2,2,2,2,22222);
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INSERT INTO t5 VALUES(1,2,3,4,5,12345);
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INSERT INTO t5 VALUES(2,3,4,5,6,23456);
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}
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execsql {
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SELECT rowid FROM t5
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WHERE a IN (1,9,2) AND b=2 AND c IN (1,2,3,4) AND d>0
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}
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} {3 2}
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do_test where4-6.2 {
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execsql {
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SELECT rowid FROM t5
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WHERE a IN (1,NULL,2) AND b=2 AND c IN (1,2,3,4) AND d>0
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}
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} {3 2}
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do_test where4-7.1 {
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execsql {
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CREATE TABLE t6(y,z,PRIMARY KEY(y,z));
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}
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execsql {
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SELECT * FROM t6 WHERE y=NULL AND z IN ('hello');
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}
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} {}
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integrity_check {where4-99.0}
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do_test where4-7.1 {
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execsql {
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BEGIN;
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CREATE TABLE t8(a, b, c, d);
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CREATE INDEX t8_i ON t8(a, b, c);
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CREATE TABLE t7(i);
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INSERT INTO t7 VALUES(1);
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INSERT INTO t7 SELECT i*2 FROM t7;
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INSERT INTO t7 SELECT i*2 FROM t7;
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INSERT INTO t7 SELECT i*2 FROM t7;
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INSERT INTO t7 SELECT i*2 FROM t7;
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INSERT INTO t7 SELECT i*2 FROM t7;
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INSERT INTO t7 SELECT i*2 FROM t7;
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COMMIT;
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}
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} {}
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# At one point the sub-select inside the aggregate sum() function in the
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# following query was leaking a couple of stack entries. This query
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# runs the SELECT in a loop enough times that an assert() fails. Or rather,
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# did fail before the bug was fixed.
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#
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do_test where4-7.2 {
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execsql {
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SELECT sum((
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SELECT d FROM t8 WHERE a = i AND b = i AND c < NULL
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)) FROM t7;
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}
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} {{}}
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}; #ifcapable subquery
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#-------------------------------------------------------------------------
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# Verify that "IS ?" with a NULL bound to the variable also functions
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# correctly.
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unset -nocomplain null
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do_execsql_test 8.1 {
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CREATE TABLE u9(a UNIQUE, b);
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INSERT INTO u9 VALUES(NULL, 1);
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INSERT INTO u9 VALUES(NULL, 2);
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}
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do_execsql_test 8.2 { SELECT * FROM u9 WHERE a IS NULL } {{} 1 {} 2}
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do_execsql_test 8.2 { SELECT * FROM u9 WHERE a IS $null } {{} 1 {} 2}
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finish_test
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