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Disable the flattening optimization if the sub-query is a recursive CTE.

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FossilOrigin-Name: 9472f6d820a7fb233936d9b8f7a39c9d4c4d6d73
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dan
2014-01-15 14:17:31 +00:00
parent f9db522fee
commit bfe31e7f80
6 changed files with 68 additions and 14 deletions
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44
test/with1.test
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@ -164,6 +164,50 @@ do_execsql_test 5.5 {
SELECT x FROM i LIMIT 20;
} {1 2 3 4 5 6 7 8 9 0}
#-------------------------------------------------------------------------
#
do_execsql_test 6.1 {
CREATE TABLE f(
id INTEGER PRIMARY KEY, parentid REFERENCES f, name TEXT
);
INSERT INTO f VALUES(0, NULL, '');
INSERT INTO f VALUES(1, 0, 'bin');
INSERT INTO f VALUES(2, 1, 'true');
INSERT INTO f VALUES(3, 1, 'false');
INSERT INTO f VALUES(4, 1, 'ls');
INSERT INTO f VALUES(5, 1, 'grep');
INSERT INTO f VALUES(6, 0, 'etc');
INSERT INTO f VALUES(7, 6, 'rc.d');
INSERT INTO f VALUES(8, 7, 'rc.apache');
INSERT INTO f VALUES(9, 7, 'rc.samba');
INSERT INTO f VALUES(10, 0, 'home');
INSERT INTO f VALUES(11, 10, 'dan');
INSERT INTO f VALUES(12, 11, 'public_html');
INSERT INTO f VALUES(13, 12, 'index.html');
INSERT INTO f VALUES(14, 13, 'logo.gif');
}
do_execsql_test 6.2 {
WITH flat(fid, fpath) AS (
SELECT id, '' FROM f WHERE parentid IS NULL
UNION ALL
SELECT id, fpath || '/' || name FROM f, flat WHERE +parentid=+fid
)
SELECT fpath FROM flat WHERE fpath!='' ORDER BY 1;
} {
/bin
/bin/false /bin/grep /bin/ls /bin/true
/etc
/etc/rc.d
/etc/rc.d/rc.apache /etc/rc.d/rc.samba
/home
/home/dan
/home/dan/public_html
/home/dan/public_html/index.html
/home/dan/public_html/index.html/logo.gif
}
finish_test