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Overview
| Comment: | When extending a database file, do so by writing one or more page-size chunks of data to the file, instead of just a single byte to the end. |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
58577135a81d3f19667b1de6167d2e3f |
| User & Date: | dan 2011-01-28 15:07:56 |
Context
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2011-01-28
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| 15:46 | Change pager_truncate() to a different method for extending files while also ensuring that writes are page-size and page-aligned. check-in: 874bc884 user: drh tags: trunk | |
| 15:07 | When extending a database file, do so by writing one or more page-size chunks of data to the file, instead of just a single byte to the end. check-in: 58577135 user: dan tags: trunk | |
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2011-01-27
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| 14:35 | SQLite version 3.7.5 release candidate 1 check-in: 35ac78f5 user: drh tags: trunk | |
Changes
Changes to src/pager.c.
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/* TODO: Is it safe to use Pager.dbFileSize here? */
rc = sqlite3OsFileSize(pPager->fd, ¤tSize);
newSize = pPager->pageSize*(i64)nPage;
if( rc==SQLITE_OK && currentSize!=newSize ){
if( currentSize>newSize ){
rc = sqlite3OsTruncate(pPager->fd, newSize);
}else{
rc = sqlite3OsWrite(pPager->fd, "", 1, newSize-1);
}
if( rc==SQLITE_OK ){
pPager->dbFileSize = nPage;
}
}
}
return rc;
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> > > | > > |
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/* TODO: Is it safe to use Pager.dbFileSize here? */
rc = sqlite3OsFileSize(pPager->fd, ¤tSize);
newSize = pPager->pageSize*(i64)nPage;
if( rc==SQLITE_OK && currentSize!=newSize ){
if( currentSize>newSize ){
rc = sqlite3OsTruncate(pPager->fd, newSize);
}else{
char *pTmp = pPager->pTmpSpace;
memset(pTmp, 0, pPager->pageSize);
while( currentSize<newSize ){
rc = sqlite3OsWrite(pPager->fd, pTmp, pPager->pageSize, currentSize);
currentSize += pPager->pageSize;
}
}
if( rc==SQLITE_OK ){
pPager->dbFileSize = nPage;
}
}
}
return rc;
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