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Experimental changes that permit read operations to continue after a

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ROLLBACK, as long as the schema is unchanged.

FossilOrigin-Name: fa6e6a9ae276cad60e9a4abc1bc23cf2809ea786
This commit is contained in:
drh
2014-11-11 01:33:57 +00:00
parent de58f4fe7f
commit 47b7fc7843
16 changed files with 95 additions and 66 deletions
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3
src/wal.c
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@@ -2506,7 +2506,7 @@ int sqlite3WalUndo(Wal *pWal, int (*xUndo)(void *, Pgno), void *pUndoCtx){
memcpy(&pWal->hdr, (void *)walIndexHdr(pWal), sizeof(WalIndexHdr));
for(iFrame=pWal->hdr.mxFrame+1;
ALWAYS(rc==SQLITE_OK) && iFrame<=iMax;
rc==SQLITE_OK && iFrame<=iMax;
iFrame++
){
/* This call cannot fail. Unless the page for which the page number
@@ -2525,7 +2525,6 @@ int sqlite3WalUndo(Wal *pWal, int (*xUndo)(void *, Pgno), void *pUndoCtx){
}
if( iMax!=pWal->hdr.mxFrame ) walCleanupHash(pWal);
}
assert( rc==SQLITE_OK );
return rc;
}