| # 2013-11-21 |
| # |
| # 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. |
| # |
| #************************************************************************* |
| # |
| # Testing of function factoring and the SQLITE_DETERMINISTIC flag. |
| # |
| set testdir [file dirname $argv0] |
| source $testdir/tester.tcl |
| |
| # Verify that constant string expressions that get factored into initializing |
| # code are not reused between function parameters and other values in the |
| # VDBE program, as the function might have changed the encoding. |
| # |
| do_execsql_test func5-1.1 { |
| PRAGMA encoding=UTF16le; |
| CREATE TABLE t1(x,a,b,c); |
| INSERT INTO t1 VALUES(1,'ab','cd',1); |
| INSERT INTO t1 VALUES(2,'gh','ef',5); |
| INSERT INTO t1 VALUES(3,'pqr','fuzzy',99); |
| INSERT INTO t1 VALUES(4,'abcdefg','xy',22); |
| INSERT INTO t1 VALUES(5,'shoe','mayer',2953); |
| SELECT x FROM t1 WHERE c=instr('abcdefg',b) OR a='abcdefg' ORDER BY +x; |
| } {2 4} |
| do_execsql_test func5-1.2 { |
| SELECT x FROM t1 WHERE a='abcdefg' OR c=instr('abcdefg',b) ORDER BY +x; |
| } {2 4} |
| |
| # Verify that SQLITE_DETERMINISTIC functions get factored out of the |
| # evaluation loop whereas non-deterministic functions do not. counter1() |
| # is marked as non-deterministic and so is not factored out of the loop, |
| # and it really is non-deterministic, returning a different result each |
| # time. But counter2() is marked as deterministic, so it does get factored |
| # out of the loop. counter2() has the same implementation as counter1(), |
| # returning a different result on each invocation, but because it is |
| # only invoked once outside of the loop, it appears to return the same |
| # result multiple times. |
| # |
| do_execsql_test func5-2.1 { |
| CREATE TABLE t2(x,y); |
| INSERT INTO t2 VALUES(1,2),(3,4),(5,6),(7,8); |
| SELECT x, y FROM t2 WHERE x+5=5+x ORDER BY +x; |
| } {1 2 3 4 5 6 7 8} |
| sqlite3_create_function db |
| do_execsql_test func5-2.2 { |
| SELECT x, y FROM t2 |
| WHERE x+counter1('hello')=counter1('hello')+x |
| ORDER BY +x; |
| } {} |
| do_execsql_test func5-2.3 { |
| SELECT x, y FROM t2 |
| WHERE x+counter2('hello')=counter2('hello')+x |
| ORDER BY +x; |
| } {1 2 3 4 5 6 7 8} |
| |
| |
| finish_test |