syntax = "proto3";

package greptime.v1;

message Column {
  string column_name = 1;

  enum SemanticType {
    TAG = 0;
    FIELD = 1;
    TIMESTAMP = 2;
  }
  SemanticType semantic_type = 2;

  message Values {
    repeated int32 i8_values = 1;
    repeated int32 i16_values = 2;
    repeated int32 i32_values = 3;
    repeated int64 i64_values = 4;

    repeated uint32 u8_values = 5;
    repeated uint32 u16_values = 6;
    repeated uint32 u32_values = 7;
    repeated uint64 u64_values = 8;

    repeated float f32_values = 9;
    repeated double f64_values = 10;

    repeated bool bool_values = 11;
    repeated bytes binary_values = 12;
    repeated string string_values = 13;

    repeated int32 date_values = 14;
    repeated int64 datetime_values = 15;
    repeated int64 ts_second_values = 16;
    repeated int64 ts_millisecond_values = 17;
    repeated int64 ts_microsecond_values = 18;
    repeated int64 ts_nanosecond_values = 19;
  }
  // The array of non-null values in this column.
  //
  // For example: suppose there is a column "foo" that contains some int32 values (1, 2, 3, 4, 5, null, 7, 8, 9, null);
  //   column:
  //     column_name: foo
  //     semantic_type: Tag
  //     values: 1, 2, 3, 4, 5, 7, 8, 9
  //     null_masks: 00100000 00000010
  Values values = 3;

  // Mask maps the positions of null values.
  // If a bit in null_mask is 1, it indicates that the column value at that position is null.
  bytes null_mask = 4;

  // 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;
}