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Do not allow VACUUM INTO into a file that already exists.

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FossilOrigin-Name: 92f70e0fa3c9de7fde046f11cc0a7c2800511bb5ace8e68c845133931607616e
This commit is contained in:
drh
2018-12-07 23:48:41 +00:00
parent 52993b31e1
commit 7464f578ed
4 changed files with 78 additions and 12 deletions
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17
src/vacuum.c
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@@ -200,6 +200,15 @@ int sqlite3RunVacuum(char **pzErrMsg, sqlite3 *db, int iDb, const char *zOut){
pDb = &db->aDb[nDb];
assert( strcmp(pDb->zDbSName,"vacuum_db")==0 );
pTemp = pDb->pBt;
if( zOut!=0 ){
sqlite3_file *id = sqlite3PagerFile(sqlite3BtreePager(pTemp));
i64 sz = 0;
if( id->pMethods!=0 && (sqlite3OsFileSize(id, &sz)!=SQLITE_OK || sz>0) ){
rc = SQLITE_ERROR;
sqlite3SetString(pzErrMsg, db, "output file already exists");
goto end_of_vacuum;
}
}
nRes = sqlite3BtreeGetOptimalReserve(pMain);
/* A VACUUM cannot change the pagesize of an encrypted database. */
@@ -374,11 +383,9 @@ end_of_vacuum:
pDb->pSchema = 0;
}
if( zOut==0 ){
/* This both clears the schemas and reduces the size of the db->aDb[]
** array. */
sqlite3ResetAllSchemasOfConnection(db);
}
/* This both clears the schemas and reduces the size of the db->aDb[]
** array. */
sqlite3ResetAllSchemasOfConnection(db);
return rc;
}