Merge pull request #13404 from taosdata/feature/wal

feat(wal): support restore from snapshot

include/libs/wal/wal.h

@@ -184,6 +184,7 @@ int32_t walRollback(SWal *, int64_t ver);
 // notify that previous logs can be pruned safely
 int32_t walBeginSnapshot(SWal *, int64_t ver);
 int32_t walEndSnapshot(SWal *);
+void    walRestoreFromSnapshot(SWal *, int64_t ver);
 // int32_t  walDataCorrupted(SWal*);
 
 // read

source/libs/wal/src/walWrite.c

@@ -18,6 +18,14 @@
 #include "tchecksum.h"
 #include "walInt.h"
 
+void walRestoreFromSnapshot(SWal *pWal, int64_t ver) {
+  pWal->vers.firstVer = -1;
+  pWal->vers.lastVer = ver;
+  pWal->vers.commitVer = ver - 1;
+  pWal->vers.snapshotVer = ver - 1;
+  pWal->vers.verInSnapshotting = -1;
+}
+
 int32_t walCommit(SWal *pWal, int64_t ver) {
   ASSERT(pWal->vers.commitVer >= pWal->vers.snapshotVer);
   ASSERT(pWal->vers.commitVer <= pWal->vers.lastVer);