/******************************************************************************
** This file is an amalgamation of many separate C source files from SQLite
-** version 3.6.8. By combining all the individual C code files into this
+** version 3.6.10. By combining all the individual C code files into this
** single large file, the entire code can be compiled as a one translation
** unit. This allows many compilers to do optimizations that would not be
** possible if the files were compiled separately. Performance improvements
** is also in a separate file. This file contains only code for the core
** SQLite library.
**
-** This amalgamation was generated on 2009-01-12 15:45:58 UTC.
+** This amalgamation was generated on 2009-01-15 16:03:22 UTC.
*/
#define SQLITE_CORE 1
#define SQLITE_AMALGAMATION 1
** where multiple cases go to the same block of code, testcase()
** can insure that all cases are evaluated.
**
-** The TESTONLY macro is used to enclose variable declarations or
-** other bits of code that are needed to support the arguments
-** within testcase() macros.
*/
#ifdef SQLITE_COVERAGE_TEST
SQLITE_PRIVATE void sqlite3Coverage(int);
# define testcase(X) if( X ){ sqlite3Coverage(__LINE__); }
-# define TESTONLY(X) X
#else
# define testcase(X)
+#endif
+
+/*
+** The TESTONLY macro is used to enclose variable declarations or
+** other bits of code that are needed to support the arguments
+** within testcase() and assert() macros.
+*/
+#if !defined(NDEBUG) || defined(SQLITE_COVERAGE_TEST)
+# define TESTONLY(X) X
+#else
# define TESTONLY(X)
#endif
** with the value (X*1000000 + Y*1000 + Z) where X, Y, and Z
** are the major version, minor version, and release number.
*/
-#define SQLITE_VERSION "3.6.8"
-#define SQLITE_VERSION_NUMBER 3006008
+#define SQLITE_VERSION "3.6.10"
+#define SQLITE_VERSION_NUMBER 3006010
/*
** CAPI3REF: Run-Time Library Version Numbers {H10020} <S60100>
SQLITE_PRIVATE int sqlite3OsUnlock(sqlite3_file*, int);
SQLITE_PRIVATE int sqlite3OsCheckReservedLock(sqlite3_file *id, int *pResOut);
SQLITE_PRIVATE int sqlite3OsFileControl(sqlite3_file*,int,void*);
+#define SQLITE_FCNTL_DB_UNCHANGED 0xca093fa0
SQLITE_PRIVATE int sqlite3OsSectorSize(sqlite3_file *id);
SQLITE_PRIVATE int sqlite3OsDeviceCharacteristics(sqlite3_file *id);
int isDelete; /* Delete on close if true */
struct vxworksFileId *pId; /* Unique file ID */
#endif
+#ifndef NDEBUG
+ /* The next group of variables are used to track whether or not the
+ ** transaction counter in bytes 24-27 of database files are updated
+ ** whenever any part of the database changes. An assertion fault will
+ ** occur if a file is updated without also updating the transaction
+ ** counter. This test is made to avoid new problems similar to the
+ ** one described by ticket #3584.
+ */
+ unsigned char transCntrChng; /* True if the transaction counter changed */
+ unsigned char dbUpdate; /* True if any part of database file changed */
+ unsigned char inNormalWrite; /* True if in a normal write operation */
+#endif
#ifdef SQLITE_TEST
/* In test mode, increase the size of this structure a bit so that
** it is larger than the struct CrashFile defined in test6.c.
}
}
+
+#ifndef NDEBUG
+ /* Set up the transaction-counter change checking flags when
+ ** transitioning from a SHARED to a RESERVED lock. The change
+ ** from SHARED to RESERVED marks the beginning of a normal
+ ** write operation (not a hot journal rollback).
+ */
+ if( rc==SQLITE_OK
+ && pFile->locktype<=SHARED_LOCK
+ && locktype==RESERVED_LOCK
+ ){
+ pFile->transCntrChng = 0;
+ pFile->dbUpdate = 0;
+ pFile->inNormalWrite = 1;
+ }
+#endif
+
+
if( rc==SQLITE_OK ){
pFile->locktype = locktype;
pLock->locktype = locktype;
SimulateIOErrorBenign(1);
SimulateIOError( h=(-1) )
SimulateIOErrorBenign(0);
+
+#ifndef NDEBUG
+ /* When reducing a lock such that other processes can start
+ ** reading the database file again, make sure that the
+ ** transaction counter was updated if any part of the database
+ ** file changed. If the transaction counter is not updated,
+ ** other connections to the same file might not realize that
+ ** the file has changed and hence might not know to flush their
+ ** cache. The use of a stale cache can lead to database corruption.
+ */
+ assert( pFile->inNormalWrite==0
+ || pFile->dbUpdate==0
+ || pFile->transCntrChng==1 );
+ pFile->inNormalWrite = 0;
+#endif
+
+
if( locktype==SHARED_LOCK ){
lock.l_type = F_RDLCK;
lock.l_whence = SEEK_SET;
int wrote = 0;
assert( id );
assert( amt>0 );
+
+#ifndef NDEBUG
+ /* If we are doing a normal write to a database file (as opposed to
+ ** doing a hot-journal rollback or a write to some file other than a
+ ** normal database file) then record the fact that the database
+ ** has changed. If the transaction counter is modified, record that
+ ** fact too.
+ */
+ if( ((unixFile*)id)->inNormalWrite ){
+ unixFile *pFile = (unixFile*)id;
+ pFile->dbUpdate = 1; /* The database has been modified */
+ if( offset<=24 && offset+amt>=27 ){
+ char oldCntr[4];
+ SimulateIOErrorBenign(1);
+ seekAndRead(pFile, 24, oldCntr, 4);
+ SimulateIOErrorBenign(0);
+ if( memcmp(oldCntr, &((char*)pBuf)[24-offset], 4)!=0 ){
+ pFile->transCntrChng = 1; /* The transaction counter has changed */
+ }
+ }
+ }
+#endif
+
while( amt>0 && (wrote = seekAndWrite((unixFile*)id, offset, pBuf, amt))>0 ){
amt -= wrote;
offset += wrote;
#else
if( dataOnly ){
rc = fdatasync(fd);
- if( OS_VXWORKS && rc==-1 && errno==ENOTSUP ){
+#if OS_VXWORKS
+ if( rc==-1 && errno==ENOTSUP ){
rc = fsync(fd);
}
+#endif
}else{
rc = fsync(fd);
}
*(int*)pArg = ((unixFile*)id)->lastErrno;
return SQLITE_OK;
}
+#ifndef NDEBUG
+ /* The pager calls this method to signal that it has done
+ ** a rollback and that the database is therefore unchanged and
+ ** it hence it is OK for the transaction change counter to be
+ ** unchanged.
+ */
+ case SQLITE_FCNTL_DB_UNCHANGED: {
+ ((unixFile*)id)->dbUpdate = 0;
+ return SQLITE_OK;
+ }
+#endif
#if SQLITE_ENABLE_LOCKING_STYLE && defined(__APPLE__)
case SQLITE_SET_LOCKPROXYFILE:
case SQLITE_GET_LOCKPROXYFILE: {
**
** Big chunks of rowid/next-ptr pairs are allocated at a time, to
** reduce the malloc overhead.
+**
+** $Id$
*/
/*
*/
static void pager_unlock(Pager *pPager){
if( !pPager->exclusiveMode ){
- int rc = osUnlock(pPager->fd, NO_LOCK);
- if( rc ) pPager->errCode = rc;
- pPager->dbSizeValid = 0;
- IOTRACE(("UNLOCK %p\n", pPager))
+ int rc;
/* Always close the journal file when dropping the database lock.
** Otherwise, another connection with journal_mode=delete might
pPager->pAlwaysRollback = 0;
}
+ rc = osUnlock(pPager->fd, NO_LOCK);
+ if( rc ) pPager->errCode = rc;
+ pPager->dbSizeValid = 0;
+ IOTRACE(("UNLOCK %p\n", pPager))
+
/* If Pager.errCode is set, the contents of the pager cache cannot be
** trusted. Now that the pager file is unlocked, the contents of the
** cache can be discarded and the error code safely cleared.
if( !pPager->exclusiveMode ){
rc2 = osUnlock(pPager->fd, SHARED_LOCK);
pPager->state = PAGER_SHARED;
+ pPager->changeCountDone = 0;
}else if( pPager->state==PAGER_SYNCED ){
pPager->state = PAGER_EXCLUSIVE;
}
assert( 0 );
end_playback:
+ /* Following a rollback, the database file should be back in its original
+ ** state prior to the start of the transaction, so invoke the
+ ** SQLITE_FCNTL_DB_UNCHANGED file-control method to disable the
+ ** assertion that the transaction counter was modified.
+ */
+ assert(
+ pPager->fd->pMethods==0 ||
+ sqlite3OsFileControl(pPager->fd,SQLITE_FCNTL_DB_UNCHANGED,0)>=SQLITE_OK
+ );
+
if( rc==SQLITE_OK ){
zMaster = pPager->pTmpSpace;
rc = readMasterJournal(pPager->jfd, zMaster, pPager->pVfs->mxPathname+1);
rc = sqlite3BtreeLast(pCrsr, &res);
pC->nullRow = (u8)res;
pC->deferredMoveto = 0;
+ pC->rowidIsValid = 0;
pC->cacheStatus = CACHE_STALE;
if( res && pOp->p2>0 ){
pc = pOp->p2 - 1;
pC->atFirst = res==0 ?1:0;
pC->deferredMoveto = 0;
pC->cacheStatus = CACHE_STALE;
+ pC->rowidIsValid = 0;
}else{
res = 1;
}
** PRAGMA [database.]journal_size_limit
** PRAGMA [database.]journal_size_limit=N
**
- ** Get or set the (boolean) value of the database 'auto-vacuum' parameter.
+ ** Get or set the size limit on rollback journal files.
*/
if( sqlite3StrICmp(zLeft,"journal_size_limit")==0 ){
Pager *pPager = sqlite3BtreePager(pDb->pBt);
** PRAGMA [database.]auto_vacuum
** PRAGMA [database.]auto_vacuum=N
**
- ** Get or set the (boolean) value of the database 'auto-vacuum' parameter.
+ ** Get or set the value of the database 'auto-vacuum' parameter.
+ ** The value is one of: 0 NONE 1 FULL 2 INCREMENTAL
*/
#ifndef SQLITE_OMIT_AUTOVACUUM
if( sqlite3StrICmp(zLeft,"auto_vacuum")==0 ){
WhereClause *pOrWC = &pTerm->u.pOrInfo->wc;
WhereTerm *pOrTerm;
int j;
+ int sortable = 0;
double rTotal = 0;
nRow = 0;
for(j=0, pOrTerm=pOrWC->a; j<pOrWC->nTerm; j++, pOrTerm++){
nRow += sTermCost.nRow;
if( rTotal>=pCost->rCost ) break;
}
+ if( pOrderBy!=0 ){
+ if( sortableByRowid(iCur, pOrderBy, pWC->pMaskSet, &rev) && !rev ){
+ sortable = 1;
+ }else{
+ rTotal += nRow*estLog(nRow);
+ WHERETRACE(("... sorting increases OR cost to %.9g\n", rTotal));
+ }
+ }
WHERETRACE(("... multi-index OR cost=%.9g nrow=%.9g\n",
rTotal, nRow));
if( rTotal<pCost->rCost ){
pCost->nRow = nRow;
pCost->plan.wsFlags = WHERE_MULTI_OR;
pCost->plan.u.pTerm = pTerm;
- if( pOrderBy!=0
- && sortableByRowid(iCur, pOrderBy, pWC->pMaskSet, &rev)
- && !rev
- ){
+ if( sortable ){
pCost->plan.wsFlags = WHERE_ORDERBY|WHERE_MULTI_OR;
}
}
**
**
**** Segment merging ****
-** To amortize update costs, segments are groups into levels and
-** merged in matches. Each increase in level represents exponentially
+** To amortize update costs, segments are grouped into levels and
+** merged in batches. Each increase in level represents exponentially
** more documents.
**
** New documents (actually, document updates) are tokenized and
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