feat: impl select (grpc) (#138)

* SelectExpr: change to oneof expr

* Convert between Vec<u8> and SelectResult

* Chore: use encode_to_vec and decode, instead of encode_length_delimited_to_vec and decode_length_delimited

* Chore: move bitset into separate file

* Grpc select impl

src/common/error/src/status_code.rs

@@ -4,48 +4,56 @@ use std::fmt;
 #[derive(Debug, Clone, Copy, PartialEq)]
 pub enum StatusCode {
     // ====== Begin of common status code ==============
+    /// Success.
+    Success = 0,
     /// Unknown error.
-    Unknown,
+    Unknown = 1,
     /// Unsupported operation.
-    Unsupported,
+    Unsupported = 2,
     /// Unexpected error, maybe there is a BUG.
-    Unexpected,
+    Unexpected = 3,
     /// Internal server error.
-    Internal,
+    Internal = 4,
     /// Invalid arguments.
-    InvalidArguments,
+    InvalidArguments = 5,
     // ====== End of common status code ================
 
     // ====== Begin of SQL related status code =========
     /// SQL Syntax error.
-    InvalidSyntax,
+    InvalidSyntax = 6,
     // ====== End of SQL related status code ===========
 
     // ====== Begin of query related status code =======
     /// Fail to create a plan for the query.
-    PlanQuery,
+    PlanQuery = 7,
     /// The query engine fail to execute query.
-    EngineExecuteQuery,
+    EngineExecuteQuery = 8,
     // ====== End of query related status code =========
 
     // ====== Begin of catalog related status code =====
     /// Table already exists.
-    TableAlreadyExists,
-    TableNotFound,
-    TableColumnNotFound,
+    TableAlreadyExists = 9,
+    TableNotFound = 10,
+    TableColumnNotFound = 11,
     // ====== End of catalog related status code =======
 
     // ====== Begin of storage related status code =====
     /// Storage is temporarily unable to handle the request
-    StorageUnavailable,
+    StorageUnavailable = 12,
     // ====== End of storage related status code =======
 
     // ====== Begin of server related status code =====
     /// Runtime resources exhausted, like creating threads failed.
-    RuntimeResourcesExhausted,
+    RuntimeResourcesExhausted = 13,
     // ====== End of server related status code =======
 }
 
+impl StatusCode {
+    pub fn is_success(code: u32) -> bool {
+        Self::Success as u32 == code
+    }
+}
+
 impl fmt::Display for StatusCode {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         // The current debug format is suitable to display.
@@ -67,4 +75,12 @@ mod tests {
         assert_status_code_display(StatusCode::Unknown, "Unknown");
         assert_status_code_display(StatusCode::TableAlreadyExists, "TableAlreadyExists");
     }
+
+    #[test]
+    fn test_is_success() {
+        assert!(StatusCode::is_success(0));
+        assert!(!StatusCode::is_success(1));
+        assert!(!StatusCode::is_success(2));
+        assert!(!StatusCode::is_success(3));
+    }
 }