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Add extended error code SQLITE_BUSY_SNAPSHOT - returned in WAL mode when a read-transaction cannot be upgraded to a write-transaction because it is reading from a snapshot other than the most recently committed.

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FossilOrigin-Name: 361c22969aa75340ed696e00e3dc5d17d5493bee
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dan
2013-06-27 11:46:27 +00:00
parent db95f68b14
commit f73819af05
6 changed files with 105 additions and 37 deletions
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src/wal.c
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@@ -2463,7 +2463,7 @@ int sqlite3WalBeginWriteTransaction(Wal *pWal){
if( memcmp(&pWal->hdr, (void *)walIndexHdr(pWal), sizeof(WalIndexHdr))!=0 ){
walUnlockExclusive(pWal, WAL_WRITE_LOCK, 1);
pWal->writeLock = 0;
rc = SQLITE_BUSY;
rc = SQLITE_BUSY_SNAPSHOT;
}
return rc;