refactor(otlp_metric): make otlp metric compatible with promql (#6543)

* chore: tmp save

Signed-off-by: shuiyisong <xixing.sys@gmail.com>

* chore: minor update

* chore: remove metric metadata and introduce shared attrs

Signed-off-by: shuiyisong <xixing.sys@gmail.com>

* chore: replace . with _ in metric name

Signed-off-by: shuiyisong <xixing.sys@gmail.com>

* chore: minor update & fix tests

Signed-off-by: shuiyisong <xixing.sys@gmail.com>

* chore: add legacy mode param to otlp metrics

Signed-off-by: shuiyisong <xixing.sys@gmail.com>

* chore: update test

Signed-off-by: shuiyisong <xixing.sys@gmail.com>

* chore: update test & fix

Signed-off-by: shuiyisong <xixing.sys@gmail.com>

* chore: add automatically legacy check for otlp metrics

Signed-off-by: shuiyisong <xixing.sys@gmail.com>

* chore: fix clippy

Signed-off-by: shuiyisong <xixing.sys@gmail.com>

* fix: typos

Signed-off-by: shuiyisong <xixing.sys@gmail.com>

* chore: insert table options in compat mode & add test

Signed-off-by: shuiyisong <xixing.sys@gmail.com>

* fix: check table options consistency

Signed-off-by: shuiyisong <xixing.sys@gmail.com>

* chore: update test and add comments

Signed-off-by: shuiyisong <xixing.sys@gmail.com>

* chore: minor tags update

Signed-off-by: shuiyisong <xixing.sys@gmail.com>

* chore: minor update about scope labeling

Signed-off-by: shuiyisong <xixing.sys@gmail.com>

* chore: update opts using header & update test

Signed-off-by: shuiyisong <xixing.sys@gmail.com>

* chore: minor code refactor

Signed-off-by: shuiyisong <xixing.sys@gmail.com>

* chore: fix cr issue

Signed-off-by: shuiyisong <xixing.sys@gmail.com>

---------

Signed-off-by: shuiyisong <xixing.sys@gmail.com>

src/session/src/context.rs

@@ -31,6 +31,7 @@ use common_time::Timezone;
 use derive_builder::Builder;
 use sql::dialect::{Dialect, GenericDialect, GreptimeDbDialect, MySqlDialect, PostgreSqlDialect};
 
+use crate::protocol_ctx::ProtocolCtx;
 use crate::session_config::{PGByteaOutputValue, PGDateOrder, PGDateTimeStyle};
 use crate::{MutableInner, ReadPreference};
 
@@ -70,6 +71,9 @@ pub struct QueryContext {
     /// Connection information
     #[builder(default)]
     conn_info: ConnInfo,
+    /// Protocol specific context
+    #[builder(default)]
+    protocol_ctx: ProtocolCtx,
 }
 
 /// This fields hold data that is only valid to current query context
@@ -447,6 +451,14 @@ impl QueryContext {
     pub fn conn_info(&self) -> &ConnInfo {
         &self.conn_info
     }
+
+    pub fn protocol_ctx(&self) -> &ProtocolCtx {
+        &self.protocol_ctx
+    }
+
+    pub fn set_protocol_ctx(&mut self, protocol_ctx: ProtocolCtx) {
+        self.protocol_ctx = protocol_ctx;
+    }
 }
 
 impl QueryContextBuilder {
@@ -470,6 +482,7 @@ impl QueryContextBuilder {
             channel,
             process_id: self.process_id.unwrap_or_default(),
             conn_info: self.conn_info.unwrap_or_default(),
+            protocol_ctx: self.protocol_ctx.unwrap_or_default(),
         }
     }
 

src/session/src/lib.rs

@@ -14,6 +14,7 @@
 
 pub mod context;
 pub mod hints;
+pub mod protocol_ctx;
 pub mod session_config;
 pub mod table_name;
 

src/session/src/protocol_ctx.rs

@@ -0,0 +1,39 @@
+// Copyright 2023 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/// Protocol specific context
+/// for carrying options(like HTTP header options) within the query context
+#[derive(Debug, Clone, Default)]
+pub enum ProtocolCtx {
+    #[default]
+    None,
+    OtlpMetric(OtlpMetricCtx),
+}
+
+impl ProtocolCtx {
+    pub fn get_otlp_metric_ctx(&self) -> Option<&OtlpMetricCtx> {
+        match self {
+            ProtocolCtx::None => None,
+            ProtocolCtx::OtlpMetric(opt) => Some(opt),
+        }
+    }
+}
+
+#[derive(Debug, Clone, Default)]
+pub struct OtlpMetricCtx {
+    pub promote_all_resource_attrs: bool,
+    pub promote_scope_attrs: bool,
+    pub with_metric_engine: bool,
+    pub is_legacy: bool,
+}