refactor: common semantic type (#73)

proto/greptime/v1/column.proto

@@ -20,14 +20,10 @@ option java_package = "io.greptime.v1";
 option java_outer_classname = "Columns";
 option go_package = "github.com/GreptimeTeam/greptime-proto/go/greptime/v1";
 
+import "greptime/v1/common.proto";
+
 message Column {
   string column_name = 1;
-
-  enum SemanticType {
-    TAG = 0;
-    FIELD = 1;
-    TIMESTAMP = 2;
-  }
   SemanticType semantic_type = 2;
 
   message Values {
@@ -78,36 +74,3 @@ message Column {
   // Helpful in creating vector from column.
   ColumnDataType datatype = 5;
 }
-
-message ColumnDef {
-  string name = 1;
-  ColumnDataType datatype = 2;
-  bool is_nullable = 3;
-  bytes default_constraint = 4;
-}
-
-enum ColumnDataType {
-  BOOLEAN = 0;
-  INT8 = 1;
-  INT16 = 2;
-  INT32 = 3;
-  INT64 = 4;
-  UINT8 = 5;
-  UINT16 = 6;
-  UINT32 = 7;
-  UINT64 = 8;
-  FLOAT32 = 9;
-  FLOAT64 = 10;
-  BINARY = 11;
-  STRING = 12;
-  DATE = 13;
-  DATETIME = 14;
-  TIMESTAMP_SECOND = 15;
-  TIMESTAMP_MILLISECOND = 16;
-  TIMESTAMP_MICROSECOND = 17;
-  TIMESTAMP_NANOSECOND = 18;
-  TIME_SECOND = 19;
-  TIME_MILLISECOND = 20;
-  TIME_MICROSECOND = 21;
-  TIME_NANOSECOND = 22;
-}