debugpb: rename some fields

proto/debugpb.proto

@@ -22,10 +22,14 @@ option java_package = "com.pingcap.tikv.kvproto";
 //                reason can be found in grpc message.
 // Note: It bypasses raft layer.
 service Debug {
-    // Read a value arbitrarily for a encoded key.
+    // Read a value arbitrarily for a key.
+    // Note: Server uses key directly w/o any encoding.
     rpc get(GetRequest) returns (GetResponse) {}
 
     // Read MVCC info arbitrarily for raw key.
+    // Note: Server takes care about the key in requests.
+    //       It will be encoded to encoded key and then
+    //       encoded to data key.
     rpc mvcc(MvccRequest) returns (MvccResponse) {}
 
     // Read raft info.
@@ -38,22 +42,20 @@ service Debug {
 
     // Scan a specific range.
     // Note: DO NOT CALL IT IN PRODUCTION, it's really expensive.
+    //       Server uses keys directly w/o any encoding.
     rpc scan(ScanRequest) returns (stream ScanResponse) {}
 }
 
-enum CF {
+enum DB {
     INVALID = 0;
-    DEFAULT = 1;
-    WRITE = 2;
-    LOCK = 3;
-    RAFT = 4;
+    KV = 1;
+    RAFT = 2;
 }
 
 message GetRequest {
-    CF cf = 1;
-    // An arbitrary key for retrieving value from TiKV.
-    // Note: Server uses it directly w/o any encoding.
-    bytes key = 2;
+    bytes key = 1;
+    DB db = 2;
+    string cf = 3;
 }
 
 message GetResponse {
@@ -68,7 +70,7 @@ message MvccRequest {
     }
 
     By by = 1;
-    string key = 2;
+    bytes key = 2;
     uint64 start_ts = 3;
 }
 
@@ -78,7 +80,7 @@ message MvccRequest {
 //   3. Short value in write.
 message MvccResponse {
     message Entry {
-        string key = 1;
+        bytes key = 1;
         kvrpcpb.MvccInfo info = 2;
     }
 
@@ -105,11 +107,16 @@ message RegionInfoResponse {
 
 message SizeRequest {
     uint64 region_id = 1;
-    repeated CF cfs = 2;
+    repeated string cfs = 2;
 }
 
 message SizeResponse {
-    uint64 size = 1;
+    message Entry {
+        string cf = 1;
+        uint64 size = 2;
+    }
+
+    repeated Entry entries = 1;
 }
 
 message ScanRequest {
@@ -119,7 +126,7 @@ message ScanRequest {
         uint64 start_ts = 2;
         uint64 commit_ts = 3;
         bool key_only = 4;
-        repeated CF cfs = 5;
+        repeated string cfs = 5;
     }
 
     bytes from_key = 1;