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Overview
| Comment: | Rearrange some code in OP_JournalMode to avoid incorrect returns from subsequent invocations of "PRAGMA journal_mode" following an IO error. |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | experimental |
| Files: | files | file ages | folders |
| SHA1: |
ce0a4a9b5f981d066822a9ae63740c91 |
| User & Date: | dan 2010-06-18 16:13:45 |
Context
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2010-06-18
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| 18:59 | Add tests to pager1.test. check-in: 582fca89 user: dan tags: experimental | |
| 16:13 | Rearrange some code in OP_JournalMode to avoid incorrect returns from subsequent invocations of "PRAGMA journal_mode" following an IO error. check-in: ce0a4a9b user: dan tags: experimental | |
| 11:10 | Change the implementation of the unix implementation of xAccess() so that it returns 0 (does not exist) to an SQLITE_ACCESS_EXISTS query on a file that exists but is zero bytes in size. check-in: 077b0e5b user: dan tags: experimental | |
Changes
Changes to src/vdbe.c.
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** to PagerCloseWal() checkpoints and deletes the write-ahead-log
** file. An EXCLUSIVE lock may still be held on the database file
** after a successful return.
*/
rc = sqlite3PagerCloseWal(pPager);
if( rc==SQLITE_OK ){
sqlite3PagerSetJournalMode(pPager, eNew);
}else if( rc==SQLITE_BUSY && pOp->p5==0 ){
goto abort_due_to_error;
}
}
/* Open a transaction on the database file. Regardless of the journal
** mode, this transaction always uses a rollback journal.
*/
assert( sqlite3BtreeIsInTrans(pBt)==0 );
if( rc==SQLITE_OK ){
rc = sqlite3BtreeSetVersion(pBt, (eNew==PAGER_JOURNALMODE_WAL ? 2 : 1));
if( rc==SQLITE_BUSY && pOp->p5==0 ) goto abort_due_to_error;
}
if( rc==SQLITE_BUSY ){
eNew = eOld;
rc = SQLITE_OK;
}
}
}
#endif /* ifndef SQLITE_OMIT_WAL */
eNew = sqlite3PagerSetJournalMode(pPager, eNew);
pOut = &aMem[pOp->p2];
pOut->flags = MEM_Str|MEM_Static|MEM_Term;
pOut->z = (char *)sqlite3JournalModename(eNew);
pOut->n = sqlite3Strlen30(pOut->z);
pOut->enc = SQLITE_UTF8;
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** to PagerCloseWal() checkpoints and deletes the write-ahead-log
** file. An EXCLUSIVE lock may still be held on the database file
** after a successful return.
*/
rc = sqlite3PagerCloseWal(pPager);
if( rc==SQLITE_OK ){
sqlite3PagerSetJournalMode(pPager, eNew);
}
}
/* Open a transaction on the database file. Regardless of the journal
** mode, this transaction always uses a rollback journal.
*/
assert( sqlite3BtreeIsInTrans(pBt)==0 );
if( rc==SQLITE_OK ){
rc = sqlite3BtreeSetVersion(pBt, (eNew==PAGER_JOURNALMODE_WAL ? 2 : 1));
}
}
}
#endif /* ifndef SQLITE_OMIT_WAL */
if( rc ){
if( rc==SQLITE_BUSY && pOp->p5!=0 ) rc = SQLITE_OK;
eNew = eOld;
}
eNew = sqlite3PagerSetJournalMode(pPager, eNew);
pOut = &aMem[pOp->p2];
pOut->flags = MEM_Str|MEM_Static|MEM_Term;
pOut->z = (char *)sqlite3JournalModename(eNew);
pOut->n = sqlite3Strlen30(pOut->z);
pOut->enc = SQLITE_UTF8;
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Changes to test/walmode.test.
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list [file exists test.db-journal] [file exists test.db-wal]
} {1 0}
# Test that nothing goes wrong if a connection is prevented from changing
# from WAL to rollback mode because a second connection has the database
# open. Or from rollback to WAL.
#
do_test walmode-4.1 {
sqlite3 db2 test.db
execsql { PRAGMA main.journal_mode } db2
} {delete}
do_test walmode-4.2 {
execsql { PRAGMA main.journal_mode = wal } db
} {wal}
do_test walmode-4.3 {
execsql { SELECT * FROM t1 } db2
} {1 2}
do_test walmode-4.4 {
catchsql { PRAGMA journal_mode = delete } db
} {1 {database is locked}}
do_test walmode-4.5 {
execsql { PRAGMA main.journal_mode } db
} {wal}
do_test walmode-4.6 {
db2 close
execsql { PRAGMA journal_mode = delete } db
} {delete}
do_test walmode-4.7 {
execsql { PRAGMA main.journal_mode } db
} {delete}
do_test walmode-4.8 {
list [file exists test.db-journal] [file exists test.db-wal]
} {0 0}
do_test walmode-4.9 {
sqlite3 db2 test.db
execsql {
BEGIN;
SELECT * FROM t1;
} db2
} {1 2}
do_test walmode-4.11 {
execsql { PRAGMA main.journal_mode } db
} {delete}
do_test walmode-4.10 {
catchsql { PRAGMA main.journal_mode = wal } db
} {1 {database is locked}}
do_test walmode-4.11 {
execsql { PRAGMA main.journal_mode } db
} {delete}
catch { db close }
catch { db2 close }
# Test that it is not possible to change a temporary or in-memory database
# to WAL mode. WAL mode is for persistent file-backed databases only.
................................................................................
# walmode-5.2.*: Try to set journal_mode=WAL on [sqlite3 db ""] database.
# walmode-5.3.*: Try to set temp.journal_mode=WAL.
#
do_test walmode-5.1.1 {
sqlite3 db :memory:
execsql { PRAGMA main.journal_mode }
} {memory}
breakpoint
do_test walmode-5.1.2 {
execsql { PRAGMA main.journal_mode = wal }
} {memory}
do_test walmode-5.1.3 {
execsql {
BEGIN;
CREATE TABLE t1(a, b);
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list [file exists test.db-journal] [file exists test.db-wal]
} {1 0}
# Test that nothing goes wrong if a connection is prevented from changing
# from WAL to rollback mode because a second connection has the database
# open. Or from rollback to WAL.
#
do_test walmode-4.6 {
sqlite3 db2 test.db
execsql { PRAGMA main.journal_mode } db2
} {delete}
do_test walmode-4.7 {
execsql { PRAGMA main.journal_mode = wal } db
} {wal}
do_test walmode-4.8 {
execsql { SELECT * FROM t1 } db2
} {1 2}
do_test walmode-4.9 {
catchsql { PRAGMA journal_mode = delete } db
} {1 {database is locked}}
do_test walmode-4.10 {
execsql { PRAGMA main.journal_mode } db
} {wal}
do_test walmode-4.11 {
db2 close
execsql { PRAGMA journal_mode = delete } db
} {delete}
do_test walmode-4.12 {
execsql { PRAGMA main.journal_mode } db
} {delete}
do_test walmode-4.13 {
list [file exists test.db-journal] [file exists test.db-wal]
} {0 0}
do_test walmode-4.14 {
sqlite3 db2 test.db
execsql {
BEGIN;
SELECT * FROM t1;
} db2
} {1 2}
do_test walmode-4.16 { execsql { PRAGMA main.journal_mode } db } {delete}
do_test walmode-4.17 { execsql { PRAGMA main.journal_mode } db2 } {delete}
do_test walmode-4.17 {
catchsql { PRAGMA main.journal_mode = wal } db
} {1 {database is locked}}
do_test walmode-4.18 {
execsql { PRAGMA main.journal_mode } db
} {delete}
catch { db close }
catch { db2 close }
# Test that it is not possible to change a temporary or in-memory database
# to WAL mode. WAL mode is for persistent file-backed databases only.
................................................................................
# walmode-5.2.*: Try to set journal_mode=WAL on [sqlite3 db ""] database.
# walmode-5.3.*: Try to set temp.journal_mode=WAL.
#
do_test walmode-5.1.1 {
sqlite3 db :memory:
execsql { PRAGMA main.journal_mode }
} {memory}
do_test walmode-5.1.2 {
execsql { PRAGMA main.journal_mode = wal }
} {memory}
do_test walmode-5.1.3 {
execsql {
BEGIN;
CREATE TABLE t1(a, b);
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