wip: fatal stats mismatch

c-deps/libroach/include/libroach.h

@@ -307,6 +307,7 @@ typedef struct {
   int64_t gc_bytes_age;
   int64_t sys_bytes;
   int64_t sys_count;
+  int64_t abort_span_bytes;
   int64_t last_update_nanos;
 } MVCCStatsResult;
 

c-deps/libroach/keys.h

@@ -9,6 +9,7 @@ const rocksdb::Slice kLocalMax("\x02", 1);
 const rocksdb::Slice kLocalRangeIDPrefix("\x01\x69", 2);
 const rocksdb::Slice kLocalRangeIDReplicatedInfix("\x72", 1);
 const rocksdb::Slice kLocalRangeAppliedStateSuffix("\x72\x61\x73\x6b", 4);
+const rocksdb::Slice kLocalAbortSpanSuffix("\x61\x62\x63\x2d", 4);
 const rocksdb::Slice kMeta2KeyMax("\x03\xff\xff", 3);
 const rocksdb::Slice kTenantPrefix("\xfe", 1);
 const rocksdb::Slice kMinKey("", 0);

c-deps/libroach/mvcc.cc

@@ -139,6 +139,23 @@ MVCCStatsResult MVCCComputeStatsInternal(::rocksdb::Iterator* const iter_rep, DB
       if (isSys) {
         stats.sys_bytes += total_bytes;
         stats.sys_count++;
+        if (decoded_key.starts_with(kLocalRangeIDPrefix)) {
+          // RangeID-local key.
+          int64_t range_id = 0;
+          rocksdb::Slice infix, suffix, detail;
+          if (!DecodeRangeIDKey(decoded_key, &range_id, &infix, &suffix, &detail)) {
+            stats.status = FmtStatus("unable to decode rangeID key");
+            return stats;
+          }
+
+          if (infix.compare(kLocalRangeIDReplicatedInfix) == 0) {
+            // Replicated RangeID-local key.
+            if (suffix.compare(kLocalAbortSpanSuffix) == 0) {
+              // Abort span key.
+              stats.abort_span_bytes += total_bytes;
+            }
+          }
+        }
       } else {
         if (!meta.deleted()) {
           stats.live_bytes += total_bytes;