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Fix a but in the WAL checkpoint code causing SQLite to use an inconsistent cache in a subsequent transaction.

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FossilOrigin-Name: d1cadeed4eea20d8892726cc8c69f4f3f57d0cd4
This commit is contained in:
dan
2010-04-29 14:51:33 +00:00
parent b4e3a6f72f
commit 31c03907fd
5 changed files with 97 additions and 13 deletions
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45
test/wal.test
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@ -918,5 +918,50 @@ foreach code [list {
db close
}
#-------------------------------------------------------------------------
# Check a fun corruption case has been fixed.
#
# The problem was that after performing a checkpoint using a connection
# that had an out-of-date pager-cache, the next time the connection was
# used it did not realize the cache was out-of-date and proceeded to
# operate with an inconsistent cache. Leading to corruption.
#
catch { db close }
catch { db2 close }
catch { db3 close }
file delete -force test.db test.db-wal
sqlite3 db test.db
sqlite3 db2 test.db
do_test wal-14 {
execsql {
PRAGMA journal_mode = WAL;
CREATE TABLE t1(a PRIMARY KEY, b);
INSERT INTO t1 VALUES(randomblob(10), randomblob(100));
INSERT INTO t1 SELECT randomblob(10), randomblob(100) FROM t1;
INSERT INTO t1 SELECT randomblob(10), randomblob(100) FROM t1;
INSERT INTO t1 SELECT randomblob(10), randomblob(100) FROM t1;
}
db2 eval {
INSERT INTO t1 SELECT randomblob(10), randomblob(100);
INSERT INTO t1 SELECT randomblob(10), randomblob(100);
INSERT INTO t1 SELECT randomblob(10), randomblob(100);
INSERT INTO t1 SELECT randomblob(10), randomblob(100);
}
# After executing the "PRAGMA checkpoint", connection [db] was being
# left with an inconsistent cache. Running the CREATE INDEX statement
# in this state led to database corruption.
catchsql {
PRAGMA checkpoint;
CREATE INDEX i1 on t1(b);
}
db2 eval { PRAGMA integrity_check }
} {ok}
finish_test