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