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Overview
| Comment: | Fix a couple of crashes in fts3 that can occur if the database contents are inconsistent. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
811e12cddfb3246c6cf3d5085bd9b72b |
| User & Date: | dan 2011-01-13 11:20:04 |
Context
|
2011-01-13
| ||
| 16:10 | Fix a typo on the sqlite3_open_v2() documentation. check-in: b0add45a user: drh tags: trunk | |
| 11:20 | Fix a couple of crashes in fts3 that can occur if the database contents are inconsistent. check-in: 811e12cd user: dan tags: trunk | |
| 10:58 | Fix a segfault that can occur in matchinfo if an fts4 table contains mostly zero-length documents. Specifically, if the table contains more rows than it does bytes of text. check-in: fe904766 user: dan tags: trunk | |
Changes
Changes to ext/fts3/fts3_write.c.
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** varints, where nCol is the number of columns in the FTS3 table.
** The first varint is the number of documents currently stored in
** the table. The following nCol varints contain the total amount of
** data stored in all rows of each column of the table, from left
** to right.
*/
sqlite3_stmt *pStmt;
rc = fts3SqlStmt(p, SQL_SELECT_DOCTOTAL, &pStmt, 0);
if( rc ) return rc;
if( sqlite3_data_count(pStmt) || sqlite3_step(pStmt)==SQLITE_ROW ){
sqlite3_int64 nDoc = 0;
sqlite3_int64 nByte = 0;
const char *a = sqlite3_column_blob(pStmt, 0);
if( a ){
const char *pEnd = &a[sqlite3_column_bytes(pStmt, 0)];
a += sqlite3Fts3GetVarint(a, &nDoc);
while( a<pEnd ){
a += sqlite3Fts3GetVarint(a, &nByte);
}
}
pCsr->nRowAvg = (int)(((nByte / nDoc) + pgsz) / pgsz);
assert( pCsr->nRowAvg>0 );
}
rc = sqlite3_reset(pStmt);
if( rc!=SQLITE_OK || pCsr->nRowAvg==0 ) return rc;
}
/* Assume that a blob flows over onto overflow pages if it is larger
** than (pgsz-35) bytes in size (the file-format documentation
** confirms this).
*/
for(iBlock=pReader->iStartBlock; iBlock<=pReader->iLeafEndBlock; iBlock++){
|
< < < | | > > > | | | | | | | | > > > | > | | < | |
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** varints, where nCol is the number of columns in the FTS3 table.
** The first varint is the number of documents currently stored in
** the table. The following nCol varints contain the total amount of
** data stored in all rows of each column of the table, from left
** to right.
*/
sqlite3_stmt *pStmt;
sqlite3_int64 nDoc = 0;
sqlite3_int64 nByte = 0;
const char *a;
rc = sqlite3Fts3SelectDoctotal(p, &pStmt);
if( rc ) return rc;
a = sqlite3_column_blob(pStmt, 0);
if( a ){
const char *pEnd = &a[sqlite3_column_bytes(pStmt, 0)];
a += sqlite3Fts3GetVarint(a, &nDoc);
while( a<pEnd ){
a += sqlite3Fts3GetVarint(a, &nByte);
}
}
if( nDoc==0 || nByte==0 ){
sqlite3_reset(pStmt);
return SQLITE_CORRUPT;
}
pCsr->nRowAvg = (int)(((nByte / nDoc) + pgsz) / pgsz);
assert( pCsr->nRowAvg>0 );
rc = sqlite3_reset(pStmt);
if( rc!=SQLITE_OK ) return rc;
}
/* Assume that a blob flows over onto overflow pages if it is larger
** than (pgsz-35) bytes in size (the file-format documentation
** confirms this).
*/
for(iBlock=pReader->iStartBlock; iBlock<=pReader->iLeafEndBlock; iBlock++){
|
Changes to test/fts3matchinfo.test.
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}
execsql { INSERT INTO t11(t11) VALUES('optimize') }
} {}
do_execsql_test 8.3 {
SELECT mit(matchinfo(t11, 'nxa')) FROM t11 WHERE t11 MATCH 'a*'
} {{204 1 3 3 0} {204 1 3 3 0} {204 1 3 3 0}}
finish_test
|
> > > > > > > > > > > > > > > > |
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}
execsql { INSERT INTO t11(t11) VALUES('optimize') }
} {}
do_execsql_test 8.3 {
SELECT mit(matchinfo(t11, 'nxa')) FROM t11 WHERE t11 MATCH 'a*'
} {{204 1 3 3 0} {204 1 3 3 0} {204 1 3 3 0}}
# Corruption related tests.
do_execsql_test 8.4.1.1 { UPDATE t11_stat SET value = X'0000'; }
do_catchsql_test 8.5.1.2 {
SELECT mit(matchinfo(t11, 'nxa')) FROM t11 WHERE t11 MATCH 'a*'
} {1 {database disk image is malformed}}
do_execsql_test 8.4.2.1 { UPDATE t11_stat SET value = X'00'; }
do_catchsql_test 8.5.2.2 {
SELECT mit(matchinfo(t11, 'nxa')) FROM t11 WHERE t11 MATCH 'a*'
} {1 {database disk image is malformed}}
do_execsql_test 8.4.3.1 { UPDATE t11_stat SET value = NULL; }
do_catchsql_test 8.5.3.2 {
SELECT mit(matchinfo(t11, 'nxa')) FROM t11 WHERE t11 MATCH 'a*'
} {1 {database disk image is malformed}}
finish_test
|