diff --git a/Cargo.lock b/Cargo.lock
index dd82669f85..a5a8f63057 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1083,11 +1083,11 @@ dependencies = [
 [[package]]
 name = "ceresdb-client-rs"
 version = "0.1.0"
-source = "git+https://github.com/CeresDB/ceresdb-client-rs.git?rev=a72e673103463c7962e01a097592fc7edbcc0b79#a72e673103463c7962e01a097592fc7edbcc0b79"
+source = "git+https://github.com/CeresDB/ceresdb-client-rs.git?rev=5fbd1a1526c3ddd25bb1f38f63f869c892052f7c#5fbd1a1526c3ddd25bb1f38f63f869c892052f7c"
 dependencies = [
  "arrow 23.0.0",
  "async-trait",
- "ceresdbproto",
+ "ceresdbproto 0.1.0 (git+https://github.com/CeresDB/ceresdbproto.git?rev=43939799b2e65e3fc5795118fc77593f7c4b19d7)",
  "dashmap 5.4.0",
  "futures 0.3.25",
  "paste 1.0.8",
@@ -1111,7 +1111,18 @@ dependencies = [
 [[package]]
 name = "ceresdbproto"
 version = "0.1.0"
-source = "git+https://github.com/CeresDB/ceresdbproto.git?rev=55495dd395d12a1f97f6c98e355290671d107c44#55495dd395d12a1f97f6c98e355290671d107c44"
+source = "git+https://github.com/CeresDB/ceresdbproto.git?rev=43939799b2e65e3fc5795118fc77593f7c4b19d7#43939799b2e65e3fc5795118fc77593f7c4b19d7"
+dependencies = [
+ "prost",
+ "protoc-bin-vendored",
+ "tonic",
+ "tonic-build",
+]
+
+[[package]]
+name = "ceresdbproto"
+version = "0.1.0"
+source = "git+https://github.com/CeresDB/ceresdbproto.git?rev=dd6921dbb59bbe9a2fcc27960e76a8c870b44415#dd6921dbb59bbe9a2fcc27960e76a8c870b44415"
 dependencies = [
  "prost",
  "protoc-bin-vendored",
@@ -1250,7 +1261,7 @@ name = "cluster"
 version = "1.0.0-alpha02"
 dependencies = [
  "async-trait",
- "ceresdbproto",
+ "ceresdbproto 0.1.0 (git+https://github.com/CeresDB/ceresdbproto.git?rev=dd6921dbb59bbe9a2fcc27960e76a8c870b44415)",
  "common_types",
  "common_util",
  "log",
@@ -3548,7 +3559,7 @@ name = "meta_client"
 version = "1.0.0-alpha02"
 dependencies = [
  "async-trait",
- "ceresdbproto",
+ "ceresdbproto 0.1.0 (git+https://github.com/CeresDB/ceresdbproto.git?rev=dd6921dbb59bbe9a2fcc27960e76a8c870b44415)",
  "common_types",
  "common_util",
  "futures 0.3.25",
@@ -5218,7 +5229,7 @@ version = "1.0.0-alpha02"
 dependencies = [
  "arrow_ext",
  "async-trait",
- "ceresdbproto",
+ "ceresdbproto 0.1.0 (git+https://github.com/CeresDB/ceresdbproto.git?rev=dd6921dbb59bbe9a2fcc27960e76a8c870b44415)",
  "clru",
  "common_types",
  "common_util",
@@ -5343,7 +5354,7 @@ name = "router"
 version = "1.0.0-alpha02"
 dependencies = [
  "async-trait",
- "ceresdbproto",
+ "ceresdbproto 0.1.0 (git+https://github.com/CeresDB/ceresdbproto.git?rev=dd6921dbb59bbe9a2fcc27960e76a8c870b44415)",
  "cluster",
  "common_types",
  "common_util",
@@ -5683,7 +5694,7 @@ dependencies = [
  "async-trait",
  "bytes 1.2.1",
  "catalog",
- "ceresdbproto",
+ "ceresdbproto 0.1.0 (git+https://github.com/CeresDB/ceresdbproto.git?rev=dd6921dbb59bbe9a2fcc27960e76a8c870b44415)",
  "cluster",
  "common_types",
  "common_util",
@@ -6013,7 +6024,7 @@ dependencies = [
  "arrow 31.0.0",
  "async-trait",
  "catalog",
- "ceresdbproto",
+ "ceresdbproto 0.1.0 (git+https://github.com/CeresDB/ceresdbproto.git?rev=dd6921dbb59bbe9a2fcc27960e76a8c870b44415)",
  "common_types",
  "common_util",
  "datafusion",
@@ -6292,7 +6303,7 @@ version = "1.0.0-alpha02"
 dependencies = [
  "arrow 31.0.0",
  "async-trait",
- "ceresdbproto",
+ "ceresdbproto 0.1.0 (git+https://github.com/CeresDB/ceresdbproto.git?rev=dd6921dbb59bbe9a2fcc27960e76a8c870b44415)",
  "common_types",
  "common_util",
  "datafusion",
diff --git a/docs/minimal.toml b/docs/minimal.toml
index 5532a48889..14e03dc3d0 100644
--- a/docs/minimal.toml
+++ b/docs/minimal.toml
@@ -4,9 +4,6 @@ http_port = 5440
 grpc_port = 8831
 log_level = "info"
 
-[analytic]
-wal_path = "/tmp/ceresdb"
-
 [analytic.storage]
 mem_cache_capacity = '1G'
 mem_cache_partition_bits = 0
@@ -15,6 +12,10 @@ mem_cache_partition_bits = 0
 type = "Local"
 data_path = "/tmp/ceresdb"
 
+[analytic.wal_storage]
+type = "RocksDB"
+path = "/tmp/ceresdb"
+
 [[static_route.topology.schema_shards]]
 schema = 'public'
 auto_create_tables = true
diff --git a/integration_tests/src/database.rs b/integration_tests/src/database.rs
index cf075288de..c2e2eb0e52 100644
--- a/integration_tests/src/database.rs
+++ b/integration_tests/src/database.rs
@@ -74,7 +74,10 @@ impl CeresDB {
     }
 
     async fn execute(query: String, client: Arc<dyn DbClient>) -> Box<dyn Display> {
-        let query_ctx = RpcContext::new("public".to_string(), "".to_string());
+        let query_ctx = RpcContext {
+            database: Some("public".to_string()),
+            timeout: None,
+        };
         let query_req = Request {
             tables: vec![],
             sql: query,
diff --git a/remote_engine_client/src/cached_router.rs b/remote_engine_client/src/cached_router.rs
index 8b1002ec67..bfb6cab176 100644
--- a/remote_engine_client/src/cached_router.rs
+++ b/remote_engine_client/src/cached_router.rs
@@ -4,7 +4,7 @@
 
 use std::collections::HashMap;
 
-use ceresdbproto::storage;
+use ceresdbproto::storage::{self, RequestContext};
 use log::debug;
 use router::RouterRef;
 use snafu::{OptionExt, ResultExt};
@@ -89,15 +89,18 @@ impl CachedRouter {
         let schema = &table_ident.schema;
         let table = table_ident.table.clone();
         let route_request = storage::RouteRequest {
+            context: Some(RequestContext {
+                database: schema.to_string(),
+            }),
             tables: vec![table],
         };
-        let route_infos =
-            self.router
-                .route(schema, route_request)
-                .await
-                .context(RouteWithCause {
-                    table_ident: table_ident.clone(),
-                })?;
+        let route_infos = self
+            .router
+            .route(route_request)
+            .await
+            .context(RouteWithCause {
+                table_ident: table_ident.clone(),
+            })?;
 
         if route_infos.is_empty() {
             return RouteNoCause {
diff --git a/router/src/cluster_based.rs b/router/src/cluster_based.rs
index 0ad02ab2da..e437e5cf67 100644
--- a/router/src/cluster_based.rs
+++ b/router/src/cluster_based.rs
@@ -34,9 +34,10 @@ fn make_route(table_name: &str, endpoint: &str) -> Result<Route> {
 
 #[async_trait]
 impl Router for ClusterBasedRouter {
-    async fn route(&self, schema: &str, req: RouteRequest) -> Result<Vec<Route>> {
+    async fn route(&self, req: RouteRequest) -> Result<Vec<Route>> {
+        let req_ctx = req.context.unwrap();
         let route_tables_req = RouteTablesRequest {
-            schema_name: schema.to_string(),
+            schema_name: req_ctx.database,
             table_names: req.tables,
         };
         let route_resp = self
diff --git a/router/src/lib.rs b/router/src/lib.rs
index cf47990e22..8153dbf1df 100644
--- a/router/src/lib.rs
+++ b/router/src/lib.rs
@@ -61,5 +61,5 @@ pub type RouterRef = Arc<dyn Router + Sync + Send>;
 
 #[async_trait]
 pub trait Router {
-    async fn route(&self, schema: &str, req: RouteRequest) -> Result<Vec<Route>>;
+    async fn route(&self, req: RouteRequest) -> Result<Vec<Route>>;
 }
diff --git a/router/src/rule_based.rs b/router/src/rule_based.rs
index 61c9428dd0..afa6e31b39 100644
--- a/router/src/rule_based.rs
+++ b/router/src/rule_based.rs
@@ -138,7 +138,9 @@ impl RuleBasedRouter {
 
 #[async_trait]
 impl Router for RuleBasedRouter {
-    async fn route(&self, schema: &str, req: RouteRequest) -> Result<Vec<Route>> {
+    async fn route(&self, req: RouteRequest) -> Result<Vec<Route>> {
+        let req_ctx = req.context.unwrap();
+        let schema = &req_ctx.database;
         if let Some(shard_nodes) = self.cluster_view.schema_shards.get(schema) {
             ensure!(!shard_nodes.is_empty(), RouteNotFound { schema });
 
diff --git a/server/src/grpc/forward.rs b/server/src/grpc/forward.rs
index e09084521f..dd06936def 100644
--- a/server/src/grpc/forward.rs
+++ b/server/src/grpc/forward.rs
@@ -9,7 +9,9 @@ use std::{
 };
 
 use async_trait::async_trait;
-use ceresdbproto::storage::{storage_service_client::StorageServiceClient, RouteRequest};
+use ceresdbproto::storage::{
+    storage_service_client::StorageServiceClient, RequestContext, RouteRequest,
+};
 use log::{debug, error, warn};
 use router::{endpoint::Endpoint, RouterRef};
 use serde_derive::Deserialize;
@@ -19,8 +21,6 @@ use tonic::{
     transport::{self, Channel},
 };
 
-use crate::consts::SCHEMA_HEADER;
-
 #[derive(Debug, Snafu)]
 pub enum Error {
     #[snafu(display(
@@ -286,10 +286,11 @@ impl<B: ClientBuilder> Forwarder<B> {
         } = forward_req;
 
         let route_req = RouteRequest {
+            context: Some(RequestContext { database: schema }),
             tables: vec![table],
         };
 
-        let endpoint = match self.router.route(&schema, route_req).await {
+        let endpoint = match self.router.route(route_req).await {
             Ok(mut routes) => {
                 if routes.len() != 1 || routes[0].endpoint.is_none() {
                     warn!(
@@ -315,11 +316,6 @@ impl<B: ClientBuilder> Forwarder<B> {
         {
             // TODO: we should use the timeout from the original request.
             req.set_timeout(self.config.forward_timeout);
-            let metadata = req.metadata_mut();
-            metadata.insert(
-                SCHEMA_HEADER,
-                schema.parse().context(InvalidSchema { schema })?,
-            );
         }
 
         // TODO: add metrics to record the forwarding.
@@ -364,6 +360,7 @@ impl<B: ClientBuilder> Forwarder<B> {
 
 #[cfg(test)]
 mod tests {
+    use catalog::consts::DEFAULT_SCHEMA;
     use ceresdbproto::storage::{Route, SqlQueryRequest, SqlQueryResponse};
     use futures::FutureExt;
     use router::Router;
@@ -397,7 +394,7 @@ mod tests {
 
     #[async_trait]
     impl Router for MockRouter {
-        async fn route(&self, _schema: &str, req: RouteRequest) -> router::Result<Vec<Route>> {
+        async fn route(&self, req: RouteRequest) -> router::Result<Vec<Route>> {
             let endpoint = self.routing_tables.get(&req.tables[0]);
             match endpoint {
                 None => Ok(vec![]),
@@ -463,20 +460,22 @@ mod tests {
 
         let make_forward_req = |table: &str| {
             let query_request = SqlQueryRequest {
+                context: Some(RequestContext {
+                    database: DEFAULT_SCHEMA.to_string(),
+                }),
                 tables: vec![table.to_string()],
                 sql: "".to_string(),
             };
             ForwardRequest {
-                schema: "public".to_string(),
+                schema: DEFAULT_SCHEMA.to_string(),
                 table: table.to_string(),
                 req: query_request.into_request(),
             }
         };
 
         let do_rpc = |_client, req: tonic::Request<SqlQueryRequest>, endpoint: &Endpoint| {
-            let schema = req.metadata().get(SCHEMA_HEADER).unwrap().to_str().unwrap();
-            assert_eq!(schema, "public");
             let req = req.into_inner();
+            assert_eq!(req.context.unwrap().database, DEFAULT_SCHEMA);
             let expect_endpoint = mock_router.routing_tables.get(&req.tables[0]).unwrap();
             assert_eq!(expect_endpoint, endpoint);
 
diff --git a/server/src/grpc/storage_service/mod.rs b/server/src/grpc/storage_service/mod.rs
index 3640e99eaf..591267209d 100644
--- a/server/src/grpc/storage_service/mod.rs
+++ b/server/src/grpc/storage_service/mod.rs
@@ -10,12 +10,10 @@ use std::{
 };
 
 use async_trait::async_trait;
-use ceresdbproto::{
-    prometheus::{PrometheusQueryRequest, PrometheusQueryResponse},
-    storage::{
-        storage_service_server::StorageService, value::Value, RouteRequest, RouteResponse,
-        SqlQueryRequest, SqlQueryResponse, WriteRequest, WriteResponse, WriteTableRequest,
-    },
+use ceresdbproto::storage::{
+    storage_service_server::StorageService, value::Value, PrometheusQueryRequest,
+    PrometheusQueryResponse, RouteRequest, RouteResponse, SqlQueryRequest, SqlQueryResponse,
+    WriteRequest, WriteResponse, WriteTableRequest,
 };
 use cluster::config::SchemaConfig;
 use common_types::{
@@ -40,7 +38,6 @@ use tonic::metadata::{KeyAndValueRef, MetadataMap};
 
 use self::sql_query::{QueryResponseBuilder, QueryResponseWriter};
 use crate::{
-    consts,
     grpc::{
         forward::ForwarderRef,
         metrics::GRPC_HANDLER_DURATION_HISTOGRAM_VEC,
@@ -59,6 +56,8 @@ pub(crate) mod write;
 const STREAM_QUERY_CHANNEL_LEN: usize = 20;
 
 /// Rpc request header
+/// Tenant/token will be saved in header in future
+#[allow(dead_code)]
 #[derive(Debug, Default)]
 pub struct RequestHeader {
     metas: HashMap<String, Vec<u8>>,
@@ -88,6 +87,7 @@ impl From<&MetadataMap> for RequestHeader {
 }
 
 impl RequestHeader {
+    #[allow(dead_code)]
     pub fn get(&self, key: &str) -> Option<&[u8]> {
         self.metas.get(key).map(|v| v.as_slice())
     }
@@ -99,8 +99,7 @@ pub struct HandlerContext<'a, Q> {
     router: RouterRef,
     instance: InstanceRef<Q>,
     catalog: String,
-    schema: String,
-    schema_config: Option<&'a SchemaConfig>,
+    schema_config_provider: &'a SchemaConfigProviderRef,
     forwarder: Option<ForwarderRef>,
     timeout: Option<Duration>,
     resp_compress_min_length: usize,
@@ -116,62 +115,26 @@ impl<'a, Q> HandlerContext<'a, Q> {
         forwarder: Option<ForwarderRef>,
         timeout: Option<Duration>,
         resp_compress_min_length: usize,
-    ) -> Result<Self> {
-        let default_catalog = instance.catalog_manager.default_catalog_name();
-        let default_schema = instance.catalog_manager.default_schema_name();
-
-        let catalog = header
-            .get(consts::CATALOG_HEADER)
-            .map(|v| String::from_utf8(v.to_vec()))
-            .transpose()
-            .box_err()
-            .context(ErrWithCause {
-                code: StatusCode::BAD_REQUEST,
-                msg: "fail to parse catalog name",
-            })?
-            .unwrap_or_else(|| default_catalog.to_string());
-
-        let schema = header
-            .get(consts::SCHEMA_HEADER)
-            .map(|v| String::from_utf8(v.to_vec()))
-            .transpose()
-            .box_err()
-            .context(ErrWithCause {
-                code: StatusCode::BAD_REQUEST,
-                msg: "fail to parse schema name",
-            })?
-            .unwrap_or_else(|| default_schema.to_string());
+    ) -> Self {
+        // catalog is not exposed to protocol layer
+        let catalog = instance.catalog_manager.default_catalog_name().to_string();
 
-        let schema_config = schema_config_provider
-            .schema_config(&schema)
-            .box_err()
-            .with_context(|| ErrWithCause {
-                code: StatusCode::INTERNAL_SERVER_ERROR,
-                msg: format!("fail to fetch schema config, schema_name:{}", schema),
-            })?;
-
-        Ok(Self {
+        Self {
             header,
             router,
             instance,
             catalog,
-            schema,
-            schema_config,
+            schema_config_provider,
             forwarder,
             timeout,
             resp_compress_min_length,
-        })
+        }
     }
 
     #[inline]
     fn catalog(&self) -> &str {
         &self.catalog
     }
-
-    #[inline]
-    fn schema(&self) -> &str {
-        &self.schema
-    }
 }
 
 #[derive(Clone)]
@@ -212,14 +175,17 @@ macro_rules! handle_request {
                 let schema_config_provider = self.schema_config_provider.clone();
                 // we need to pass the result via channel
                 let join_handle = runtime.spawn(async move {
+                    let req = request.into_inner();
+                    if req.context.is_none() {
+                        ErrNoCause {
+                            code: StatusCode::BAD_REQUEST,
+                            msg: "database is not set",
+                        }
+                        .fail()?
+                    }
                     let handler_ctx =
-                        HandlerContext::new(header, router, instance, &schema_config_provider, forwarder, timeout, resp_compress_min_length)
-                            .box_err()
-                            .context(ErrWithCause {
-                                code: StatusCode::BAD_REQUEST,
-                                msg: "invalid header",
-                            })?;
-                    $mod_name::$handle_fn(&handler_ctx, request.into_inner())
+                        HandlerContext::new(header, router, instance, &schema_config_provider, forwarder, timeout, resp_compress_min_length);
+                    $mod_name::$handle_fn(&handler_ctx, req)
                         .await
                         .map_err(|e| {
                             error!(
@@ -260,6 +226,9 @@ macro_rules! handle_request {
 }
 
 impl<Q: QueryExecutor + 'static> StorageServiceImpl<Q> {
+    // `RequestContext` is ensured in `handle_request` macro, so handler
+    // can just use it with unwrap()
+
     handle_request!(route, handle_route, RouteRequest, RouteResponse);
 
     handle_request!(write, handle_write, WriteRequest, WriteResponse);
@@ -282,7 +251,6 @@ impl<Q: QueryExecutor + 'static> StorageServiceImpl<Q> {
         let header = RequestHeader::from(request.metadata());
         let instance = self.instance.clone();
         let schema_config_provider = self.schema_config_provider.clone();
-
         let handler_ctx = HandlerContext::new(
             header,
             router,
@@ -291,12 +259,7 @@ impl<Q: QueryExecutor + 'static> StorageServiceImpl<Q> {
             self.forwarder.clone(),
             self.timeout,
             self.resp_compress_min_length,
-        )
-        .box_err()
-        .context(ErrWithCause {
-            code: StatusCode::BAD_REQUEST,
-            msg: "invalid header",
-        })?;
+        );
 
         let mut total_success = 0;
         let mut resp = WriteResponse::default();
@@ -355,26 +318,28 @@ impl<Q: QueryExecutor + 'static> StorageServiceImpl<Q> {
 
         let (tx, rx) = mpsc::channel(STREAM_QUERY_CHANNEL_LEN);
         let _: JoinHandle<Result<()>> = self.runtimes.read_runtime.spawn(async move {
-            let handler_ctx = HandlerContext::new(header, router, instance, &schema_config_provider, forwarder, timeout, resp_compress_min_length)
-                .box_err()
-                .context(ErrWithCause {
-                    code: StatusCode::BAD_REQUEST,
-                    msg: "invalid header",
-                })?;
-
+            let handler_ctx = HandlerContext::new(
+                header,
+                router,
+                instance,
+                &schema_config_provider,
+                forwarder,
+                timeout,
+                resp_compress_min_length,
+            );
             let query_req = request.into_inner();
             let output = sql_query::fetch_query_output(&handler_ctx, &query_req)
-                    .await
-                    .map_err(|e| {
-                        error!("Failed to handle request, mod:stream_query, handler:handle_stream_query, err:{}", e);
-                        e
-                    })?;
+                .await
+                .map_err(|e| {
+                    error!("Failed to handle request, mod:stream_query, handler:handle_stream_query, err:{}", e);
+                    e
+                })?;
             match output {
                 Output::AffectedRows(rows) => {
-                        let resp = QueryResponseBuilder::with_ok_header().build_with_affected_rows(rows);
-                        if tx.send(Ok(resp)).await.is_err() {
-                            error!("Failed to send affected rows resp in stream query");
-                        }
+                    let resp = QueryResponseBuilder::with_ok_header().build_with_affected_rows(rows);
+                    if tx.send(Ok(resp)).await.is_err() {
+                        error!("Failed to send affected rows resp in stream query");
+                    }
                 }
                 Output::Records(batches) => {
                     for batch in &batches {
diff --git a/server/src/grpc/storage_service/prom_query.rs b/server/src/grpc/storage_service/prom_query.rs
index 05789c59b4..96f64b67af 100644
--- a/server/src/grpc/storage_service/prom_query.rs
+++ b/server/src/grpc/storage_service/prom_query.rs
@@ -8,7 +8,8 @@ use std::{
 
 use ceresdbproto::{
     common::ResponseHeader,
-    prometheus::{Label, PrometheusQueryRequest, PrometheusQueryResponse, Sample, TimeSeries},
+    prometheus::{Label, Sample, TimeSeries},
+    storage::{PrometheusQueryRequest, PrometheusQueryResponse},
 };
 use common_types::{
     datum::DatumKind,
@@ -49,13 +50,14 @@ where
     let request_id = RequestId::next_id();
     let begin_instant = Instant::now();
     let deadline = ctx.timeout.map(|t| begin_instant + t);
+    let req_ctx = req.context.unwrap();
+    let schema = req_ctx.database;
 
     debug!(
-        "Grpc handle query begin, catalog:{}, schema:{}, request_id:{}, request:{:?}",
+        "Grpc handle query begin, catalog:{}, schema:{}, request_id:{}",
         ctx.catalog(),
-        ctx.schema(),
+        &schema,
         request_id,
-        req,
     );
 
     let instance = &ctx.instance;
@@ -64,14 +66,14 @@ where
     let provider = CatalogMetaProvider {
         manager: instance.catalog_manager.clone(),
         default_catalog: ctx.catalog(),
-        default_schema: ctx.schema(),
+        default_schema: &schema,
         function_registry: &*instance.function_registry,
     };
     let frontend = Frontend::new(provider);
 
     let mut sql_ctx = SqlContext::new(request_id, deadline);
     let expr = frontend
-        .parse_promql(&mut sql_ctx, req)
+        .parse_promql(&mut sql_ctx, req.expr)
         .box_err()
         .context(ErrWithCause {
             code: StatusCode::BAD_REQUEST,
@@ -105,7 +107,7 @@ where
     // Execute in interpreter
     let interpreter_ctx = InterpreterContext::builder(request_id, deadline)
         // Use current ctx's catalog and schema as default catalog and schema
-        .default_catalog_and_schema(ctx.catalog().to_string(), ctx.schema().to_string())
+        .default_catalog_and_schema(ctx.catalog().to_string(), schema.to_string())
         .build();
     let interpreter_factory = Factory::new(
         instance.query_executor.clone(),
diff --git a/server/src/grpc/storage_service/route.rs b/server/src/grpc/storage_service/route.rs
index a5b57869dd..be34143295 100644
--- a/server/src/grpc/storage_service/route.rs
+++ b/server/src/grpc/storage_service/route.rs
@@ -13,7 +13,7 @@ pub async fn handle_route<Q>(
     ctx: &HandlerContext<'_, Q>,
     req: RouteRequest,
 ) -> Result<RouteResponse> {
-    let routes = ctx.router.route(ctx.schema(), req).await?;
+    let routes = ctx.router.route(req).await?;
 
     let resp = RouteResponse {
         header: Some(error::build_ok_header()),
diff --git a/server/src/grpc/storage_service/sql_query.rs b/server/src/grpc/storage_service/sql_query.rs
index c3f60214df..143d5346d6 100644
--- a/server/src/grpc/storage_service/sql_query.rs
+++ b/server/src/grpc/storage_service/sql_query.rs
@@ -92,8 +92,9 @@ async fn maybe_forward_query<Q: QueryExecutor + 'static>(
         return None;
     }
 
+    let req_ctx = req.context.as_ref().unwrap();
     let forward_req = ForwardRequest {
-        schema: ctx.schema.clone(),
+        schema: req_ctx.database.clone(),
         table: req.tables[0].clone(),
         req: req.clone().into_request(),
     };
@@ -155,20 +156,21 @@ pub async fn fetch_query_output<Q: QueryExecutor + 'static>(
     let deadline = ctx.timeout.map(|t| begin_instant + t);
 
     info!(
-        "Grpc handle query begin, catalog:{}, schema:{}, request_id:{}, request:{:?}",
+        "Grpc handle query begin, catalog:{}, request_id:{}, request:{:?}",
         ctx.catalog(),
-        ctx.schema(),
         request_id,
         req,
     );
 
+    let req_ctx = req.context.as_ref().unwrap();
+    let schema = &req_ctx.database;
     let instance = &ctx.instance;
     // TODO(yingwen): Privilege check, cannot access data of other tenant
     // TODO(yingwen): Maybe move MetaProvider to instance
     let provider = CatalogMetaProvider {
         manager: instance.catalog_manager.clone(),
         default_catalog: ctx.catalog(),
-        default_schema: ctx.schema(),
+        default_schema: schema,
         function_registry: &*instance.function_registry,
     };
     let frontend = Frontend::new(provider);
@@ -240,7 +242,7 @@ pub async fn fetch_query_output<Q: QueryExecutor + 'static>(
     // Execute in interpreter
     let interpreter_ctx = InterpreterContext::builder(request_id, deadline)
         // Use current ctx's catalog and schema as default catalog and schema
-        .default_catalog_and_schema(ctx.catalog().to_string(), ctx.schema().to_string())
+        .default_catalog_and_schema(ctx.catalog().to_string(), schema.to_string())
         .build();
     let interpreter_factory = Factory::new(
         instance.query_executor.clone(),
@@ -279,7 +281,7 @@ pub async fn fetch_query_output<Q: QueryExecutor + 'static>(
     info!(
         "Grpc handle query success, catalog:{}, schema:{}, request_id:{}, cost:{}ms, request:{:?}",
         ctx.catalog(),
-        ctx.schema(),
+        schema,
         request_id,
         begin_instant.saturating_elapsed().as_millis(),
         req,
diff --git a/server/src/grpc/storage_service/write.rs b/server/src/grpc/storage_service/write.rs
index 34c35e0d85..e4850c2574 100644
--- a/server/src/grpc/storage_service/write.rs
+++ b/server/src/grpc/storage_service/write.rs
@@ -45,7 +45,17 @@ pub(crate) async fn handle_write<Q: QueryExecutor + 'static>(
     let begin_instant = Instant::now();
     let deadline = ctx.timeout.map(|t| begin_instant + t);
     let catalog = ctx.catalog();
-    let schema = ctx.schema();
+    let req_ctx = req.context.unwrap();
+    let schema = req_ctx.database;
+    let schema_config = ctx
+        .schema_config_provider
+        .schema_config(&schema)
+        .box_err()
+        .with_context(|| ErrWithCause {
+            code: StatusCode::INTERNAL_SERVER_ERROR,
+            msg: format!("fail to fetch schema config, schema_name:{}", schema),
+        })?;
+
     debug!(
         "Grpc handle write begin, catalog:{}, schema:{}, request_id:{}, first_table:{:?}, num_tables:{}",
         catalog,
@@ -60,10 +70,10 @@ pub(crate) async fn handle_write<Q: QueryExecutor + 'static>(
     let plan_vec = write_request_to_insert_plan(
         request_id,
         catalog,
-        schema,
+        &schema,
         ctx.instance.clone(),
-        req,
-        ctx.schema_config,
+        req.table_requests,
+        schema_config,
         deadline,
     )
     .await?;
@@ -73,7 +83,7 @@ pub(crate) async fn handle_write<Q: QueryExecutor + 'static>(
         success += execute_plan(
             request_id,
             catalog,
-            schema,
+            &schema,
             ctx.instance.clone(),
             insert_plan,
             deadline,
@@ -160,13 +170,13 @@ pub async fn write_request_to_insert_plan<Q: QueryExecutor + 'static>(
     catalog: &str,
     schema: &str,
     instance: InstanceRef<Q>,
-    write_request: WriteRequest,
+    table_requests: Vec<WriteTableRequest>,
     schema_config: Option<&SchemaConfig>,
     deadline: Option<Instant>,
 ) -> Result<Vec<InsertPlan>> {
-    let mut plan_vec = Vec::with_capacity(write_request.table_requests.len());
+    let mut plan_vec = Vec::with_capacity(table_requests.len());
 
-    for write_table_req in write_request.table_requests {
+    for write_table_req in table_requests {
         let table_name = &write_table_req.table;
         let mut table = try_get_table(catalog, schema, instance.clone(), table_name)?;
 
diff --git a/server/src/handlers/prom.rs b/server/src/handlers/prom.rs
index 5ce7fddfee..b6e859abff 100644
--- a/server/src/handlers/prom.rs
+++ b/server/src/handlers/prom.rs
@@ -8,8 +8,7 @@ use std::{collections::HashMap, time::Instant};
 
 use async_trait::async_trait;
 use ceresdbproto::storage::{
-    value, Field, FieldGroup, Tag, Value, WriteRequest as WriteRequestPb, WriteSeriesEntry,
-    WriteTableRequest,
+    value, Field, FieldGroup, Tag, Value, WriteSeriesEntry, WriteTableRequest,
 };
 use common_types::{
     datum::DatumKind,
@@ -162,7 +161,7 @@ impl<Q> CeresDBStorage<Q> {
         Ok((metric, filters))
     }
 
-    fn convert_write_request(req: WriteRequest) -> Result<WriteRequestPb> {
+    fn convert_write_request(req: WriteRequest) -> Result<Vec<WriteTableRequest>> {
         let mut req_by_metric = HashMap::new();
         for timeseries in req.timeseries {
             let (metric, labels) = Self::normalize_labels(timeseries.labels)?;
@@ -207,9 +206,7 @@ impl<Q> CeresDBStorage<Q> {
                 });
         }
 
-        Ok(WriteRequestPb {
-            table_requests: req_by_metric.into_values().collect(),
-        })
+        Ok(req_by_metric.into_values().collect())
     }
 
     fn convert_query_result(metric: String, resp: Output) -> Result<QueryResult> {
diff --git a/sql/src/frontend.rs b/sql/src/frontend.rs
index 1c0a4d9a00..e46fc92da2 100644
--- a/sql/src/frontend.rs
+++ b/sql/src/frontend.rs
@@ -4,7 +4,7 @@
 
 use std::{sync::Arc, time::Instant};
 
-use ceresdbproto::prometheus::PrometheusQueryRequest;
+use ceresdbproto::prometheus::Expr as PromExpr;
 use common_types::request_id::RequestId;
 use snafu::{Backtrace, OptionExt, ResultExt, Snafu};
 use table_engine::table;
@@ -85,8 +85,8 @@ impl<P> Frontend<P> {
     }
 
     /// Parse the request and returns the Expr
-    pub fn parse_promql(&self, _ctx: &mut Context, req: PrometheusQueryRequest) -> Result<Expr> {
-        let expr = req.expr.context(ExprNotFoundInPromRequest)?;
+    pub fn parse_promql(&self, _ctx: &mut Context, expr: Option<PromExpr>) -> Result<Expr> {
+        let expr = expr.context(ExprNotFoundInPromRequest)?;
         Expr::try_from(expr).context(InvalidPromRequest)
     }
 }