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Overview
| Comment: | Avoid a division-by-zero error in fts5 caused by a corrupt database. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: | 928e622178bd004be52b2271ac554176 |
| User & Date: | dan 2019-01-19 15:55:27 |
Context
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2019-01-20
| ||
| 00:03 | Add the --max-stack option to dbfuzz2. check-in: c11ae4fe user: drh tags: trunk | |
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2019-01-19
| ||
| 15:55 | Avoid a division-by-zero error in fts5 caused by a corrupt database. check-in: 928e6221 user: dan tags: trunk | |
| 15:27 | Remove a broken assert() triggered by a "PRAGMA max_page_count = N" invocation, where N is larger than the number of pages in the database image, but smaller than the number of pages in the database file. check-in: 7cd56cad user: dan tags: trunk | |
Changes
Changes to ext/fts5/fts5_aux.c.
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p->nPhrase = nPhrase;
p->aIDF = (double*)&p[1];
p->aFreq = &p->aIDF[nPhrase];
}
/* Calculate the average document length for this FTS5 table */
if( rc==SQLITE_OK ) rc = pApi->xRowCount(pFts, &nRow);
if( rc==SQLITE_OK ) rc = pApi->xColumnTotalSize(pFts, -1, &nToken);
if( rc==SQLITE_OK ) p->avgdl = (double)nToken / (double)nRow;
/* Calculate an IDF for each phrase in the query */
for(i=0; rc==SQLITE_OK && i<nPhrase; i++){
sqlite3_int64 nHit = 0;
rc = pApi->xQueryPhrase(pFts, i, (void*)&nHit, fts5CountCb);
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> |
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p->nPhrase = nPhrase;
p->aIDF = (double*)&p[1];
p->aFreq = &p->aIDF[nPhrase];
}
/* Calculate the average document length for this FTS5 table */
if( rc==SQLITE_OK ) rc = pApi->xRowCount(pFts, &nRow);
assert( rc!=SQLITE_OK || nRow>0 );
if( rc==SQLITE_OK ) rc = pApi->xColumnTotalSize(pFts, -1, &nToken);
if( rc==SQLITE_OK ) p->avgdl = (double)nToken / (double)nRow;
/* Calculate an IDF for each phrase in the query */
for(i=0; rc==SQLITE_OK && i<nPhrase; i++){
sqlite3_int64 nHit = 0;
rc = pApi->xQueryPhrase(pFts, i, (void*)&nHit, fts5CountCb);
|
Changes to ext/fts5/fts5_storage.c.
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}
return rc;
}
int sqlite3Fts5StorageRowCount(Fts5Storage *p, i64 *pnRow){
int rc = fts5StorageLoadTotals(p, 0);
if( rc==SQLITE_OK ){
*pnRow = p->nTotalRow;
}
return rc;
}
/*
** Flush any data currently held in-memory to disk.
*/
|
> > > > > > |
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}
return rc;
}
int sqlite3Fts5StorageRowCount(Fts5Storage *p, i64 *pnRow){
int rc = fts5StorageLoadTotals(p, 0);
if( rc==SQLITE_OK ){
/* nTotalRow being zero does not necessarily indicate a corrupt
** database - it might be that the FTS5 table really does contain zero
** rows. However this function is only called from the xRowCount() API,
** and there is no way for that API to be invoked if the table contains
** no rows. Hence the FTS5_CORRUPT return. */
*pnRow = p->nTotalRow;
if( p->nTotalRow<=0 ) rc = FTS5_CORRUPT;
}
return rc;
}
/*
** Flush any data currently held in-memory to disk.
*/
|
Changes to ext/fts5/test/fts5corrupt3.test.
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SELECT quote(block) FROM t1_data WHERE rowid=10;
} {X'000000000101010001010101'}
do_execsql_test 37.1 {
UPDATE t1_data SET block = X'FFFFFFFF0101010001010101' WHERE rowid = 10;
SELECT rowid FROM t1('a');
} {1}
sqlite3_fts5_may_be_corrupt 0
finish_test
|
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SELECT quote(block) FROM t1_data WHERE rowid=10;
} {X'000000000101010001010101'}
do_execsql_test 37.1 {
UPDATE t1_data SET block = X'FFFFFFFF0101010001010101' WHERE rowid = 10;
SELECT rowid FROM t1('a');
} {1}
#-------------------------------------------------------------------------
reset_db
do_execsql_test 38.0 {
CREATE VIRTUAL TABLE t1 USING fts5(b, c);
INSERT INTO t1 VALUES('a', 'b');
INSERT INTO t1 VALUES('a', 'b');
SELECT quote(block) FROM t1_data WHERE rowid=1;
} {X'020202'}
do_execsql_test 38.1 {
SELECT * FROM t1('a b') ORDER BY rank;
} {a b a b}
do_execsql_test 38.2 {
UPDATE t1_data SET block = X'000202' WHERE rowid=1;
}
breakpoint
do_catchsql_test 38.3 {
SELECT * FROM t1('a b') ORDER BY rank;
} {1 {database disk image is malformed}}
db close
sqlite3 db test.db
do_catchsql_test 38.4 {
SELECT * FROM t1('a b') ORDER BY rank;
} {1 {database disk image is malformed}}
sqlite3_fts5_may_be_corrupt 0
finish_test
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