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If sqlite3_column_value() is called to obtain a value with the MEM_Static flag set, clear it and set the MEM_Ephem flag before returning. Otherwise, if the value is passed to sqlite3_bind_value() or sqlite3_result_value(), sqlite may attempt to use the buffer after the statement has been finalized. This is not always valid, as MEM_Static only guarantees that a MEM.z buffer will be valid for the lifetime of the owner statement, not that it is actually a static buffer. (CVS 5812)

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FossilOrigin-Name: b055bfc4e5268d8a66d6a4f5e8aec1285fe4b8e7
This commit is contained in:
danielk1977
2008-10-13 10:37:49 +00:00
parent a3465f2d78
commit d0ffa1e815
5 changed files with 51 additions and 15 deletions
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30
test/vtab2.test
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@ -10,7 +10,7 @@
#***********************************************************************
# This file implements regression tests for SQLite library.
#
# $Id: vtab2.test,v 1.8 2008/01/31 15:53:46 drh Exp $
# $Id: vtab2.test,v 1.9 2008/10/13 10:37:50 danielk1977 Exp $
set testdir [file dirname $argv0]
source $testdir/tester.tcl
@ -105,4 +105,32 @@ do_test vtab2-3.2 {
}
} {main schema 0 database {} 0 {} 0 {} {} {} {} {} {} {} {} {}}
do_test vtab2-4.1 {
execsql {
BEGIN TRANSACTION;
CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c, UNIQUE(b, c));
CREATE TABLE fkey(
to_tbl,
to_col
);
INSERT INTO "fkey" VALUES('t1',NULL);
COMMIT;
}
} {}
do_test vtab2-4.2 {
execsql { CREATE VIRTUAL TABLE v_col USING schema }
} {}
do_test vtab2-4.3 {
execsql { SELECT name FROM v_col WHERE tablename = 't1' AND pk }
} {a}
do_test vtab2-4.4 {
execsql {
UPDATE fkey
SET to_col = (SELECT name FROM v_col WHERE tablename = 't1' AND pk);
}
} {}
do_test vtab2-4.5 {
execsql { SELECT * FROM fkey }
} {t1 a}
finish_test