database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-08-05 15:55:57 +03:00
Code Activity

Experimental change so that snapshot transactions always lock the wal file -

Browse Source 
preventing writers or truncate-checkpointers from wrapping it.

FossilOrigin-Name: d71eeaab9ecdeed772047498b781be1f0be0655af284b94cf676bb408ceea8b1
This commit is contained in:
dan
2017-09-23 07:46:54 +00:00
parent 3314062b9d
commit 21f2bafd9b
4 changed files with 113 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
src/wal.c
View File

@@ -2250,8 +2250,7 @@ static int walTryBeginRead(Wal *pWal, int *pChanged, int useWal, int cnt){
pInfo = walCkptInfo(pWal);
if( !useWal && pInfo->nBackfill==pWal->hdr.mxFrame
#ifdef SQLITE_ENABLE_SNAPSHOT
&& (pWal->pSnapshot==0 || pWal->hdr.mxFrame==0
|| 0==memcmp(&pWal->hdr, pWal->pSnapshot, sizeof(WalIndexHdr)))
&& (pWal->pSnapshot==0 || pWal->hdr.mxFrame==0)
#endif
){
/* The WAL has been completely backfilled (or it is empty).