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Overview
| Comment: | 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. |
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| Downloads: | Tarball | ZIP archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
fe9047668eaaf76e7aa1ef1f32dec7c7 |
| User & Date: | dan 2011-01-13 10:58:27.000 |
Context
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2011-01-13
| ||
| 11:20 | Fix a couple of crashes in fts3 that can occur if the database contents are inconsistent. (check-in: 811e12cddf 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: fe9047668e user: dan tags: trunk) | |
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2011-01-12
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| 17:56 | Do not raise an SQLITE_CORRUPT error in Recoverymode if the database size in the header is larger than the physical file size. This facilitates recovery of a database in which the database size field has been corrupted. (check-in: 114640d920 user: drh tags: trunk) | |
Changes
Changes to ext/fts3/fts3_snippet.c.
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952 953 954 955 956 957 958 959 960 961 962 963 964 965 |
sqlite3_int64 nDoc;
if( !*ppStmt ){
int rc = sqlite3Fts3SelectDoctotal(pTab, ppStmt);
if( rc!=SQLITE_OK ) return rc;
}
pStmt = *ppStmt;
a = sqlite3_column_blob(pStmt, 0);
a += sqlite3Fts3GetVarint(a, &nDoc);
*pnDoc = (u32)nDoc;
if( paLen ) *paLen = a;
return SQLITE_OK;
| > | 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 |
sqlite3_int64 nDoc;
if( !*ppStmt ){
int rc = sqlite3Fts3SelectDoctotal(pTab, ppStmt);
if( rc!=SQLITE_OK ) return rc;
}
pStmt = *ppStmt;
assert( sqlite3_data_count(pStmt)==1 );
a = sqlite3_column_blob(pStmt, 0);
a += sqlite3Fts3GetVarint(a, &nDoc);
*pnDoc = (u32)nDoc;
if( paLen ) *paLen = a;
return SQLITE_OK;
|
| ︙ | ︙ |
Changes to ext/fts3/fts3_write.c.
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1100 1101 1102 1103 1104 1105 1106 |
** 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;
| | | > | 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 |
** 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
|
| ︙ | ︙ |
install-sh became a regular file.
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Changes to test/fts3matchinfo.test.
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333 334 335 336 337 338 339 340 341 342 |
SELECT typeof(matchinfo(t10)), length(matchinfo(t10)) FROM t10 WHERE docid=1;
} {blob 0}
do_execsql_test 7.4 {
SELECT typeof(matchinfo(t10)), length(matchinfo(t10))
FROM t10 WHERE t10 MATCH 'record'
} {blob 20 blob 20}
finish_test
| > > > > > > > > > > > > > > > > > > > > > > > > > > | 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 |
SELECT typeof(matchinfo(t10)), length(matchinfo(t10)) FROM t10 WHERE docid=1;
} {blob 0}
do_execsql_test 7.4 {
SELECT typeof(matchinfo(t10)), length(matchinfo(t10))
FROM t10 WHERE t10 MATCH 'record'
} {blob 20 blob 20}
#-------------------------------------------------------------------------
# Test a special case - matchinfo('nxa') with many zero length documents.
# Special because "x" internally uses a statement used by both "n" and "a".
# This was causing a problem at one point in the obscure case where the
# total number of bytes of data stored in an fts3 table was greater than
# the number of rows. i.e. when the following query returns true:
#
# SELECT sum(length(content)) < count(*) FROM fts4table;
#
do_execsql_test 8.1 {
CREATE VIRTUAL TABLE t11 USING fts4;
INSERT INTO t11(t11) VALUES('nodesize=24');
INSERT INTO t11 VALUES('quitealongstringoftext');
INSERT INTO t11 VALUES('anotherquitealongstringoftext');
INSERT INTO t11 VALUES('athirdlongstringoftext');
INSERT INTO t11 VALUES('andonemoreforgoodluck');
}
do_test 8.2 {
for {set i 0} {$i < 200} {incr i} {
execsql { INSERT INTO t11 VALUES('') }
}
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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test/progress.test became executable.
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tool/mkopts.tcl became executable.
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