feat: add json datatype for grpc protocol (#4897)

* chore: update greptime-proto

* feat: add json datatype for grpc protocol

Cargo.lock

@@ -4531,7 +4531,7 @@ dependencies = [
 [[package]]
 name = "greptime-proto"
 version = "0.1.0"
-source = "git+https://github.com/GreptimeTeam/greptime-proto.git?rev=fc45ac4cce7e91c9438c2e5a497a4d99531397f1#fc45ac4cce7e91c9438c2e5a497a4d99531397f1"
+source = "git+https://github.com/GreptimeTeam/greptime-proto.git?rev=9faf45e8bd83cba106ddfb09bba85784bf9ade2a#9faf45e8bd83cba106ddfb09bba85784bf9ade2a"
 dependencies = [
  "prost 0.12.6",
  "serde",

Cargo.toml

@@ -121,7 +121,7 @@ etcd-client = { version = "0.13" }
 fst = "0.4.7"
 futures = "0.3"
 futures-util = "0.3"
-greptime-proto = { git = "https://github.com/GreptimeTeam/greptime-proto.git", rev = "fc45ac4cce7e91c9438c2e5a497a4d99531397f1" }
+greptime-proto = { git = "https://github.com/GreptimeTeam/greptime-proto.git", rev = "9faf45e8bd83cba106ddfb09bba85784bf9ade2a" }
 humantime = "2.1"
 humantime-serde = "1.1"
 itertools = "0.10"

src/api/src/helper.rs

@@ -116,6 +116,7 @@ impl From<ColumnDataTypeWrapper> for ConcreteDataType {
                     ConcreteDataType::binary_datatype()
                 }
             }
+            ColumnDataType::Json => ConcreteDataType::json_datatype(),
             ColumnDataType::String => ConcreteDataType::string_datatype(),
             ColumnDataType::Date => ConcreteDataType::date_datatype(),
             ColumnDataType::Datetime => ConcreteDataType::datetime_datatype(),
@@ -417,6 +418,10 @@ pub fn values_with_capacity(datatype: ColumnDataType, capacity: usize) -> Values
             decimal128_values: Vec::with_capacity(capacity),
             ..Default::default()
         },
+        ColumnDataType::Json => Values {
+            string_values: Vec::with_capacity(capacity),
+            ..Default::default()
+        },
     }
 }
 

src/operator/src/req_convert/common.rs

@@ -114,6 +114,7 @@ fn push_column_to_rows(column: Column, rows: &mut [Row]) -> Result<()> {
         (Float64, F64Value, f64_values),
         (Binary, BinaryValue, binary_values),
         (String, StringValue, string_values),
+        (Json, StringValue, string_values),
         (Date, DateValue, date_values),
         (Datetime, DatetimeValue, datetime_values),
         (