refactor: unify rds kvbackend impl

Author: CookiePieWw

src/cli/src/bench.rs

@@ -24,7 +24,7 @@ use common_meta::key::{TableMetadataManager, TableMetadataManagerRef};
 use common_meta::kv_backend::etcd::EtcdStore;
 use common_meta::kv_backend::memory::MemoryKvBackend;
 #[cfg(feature = "pg_kvbackend")]
-use common_meta::kv_backend::postgres::PgStore;
+use common_meta::kv_backend::rds::PgStore;
 use common_meta::peer::Peer;
 use common_meta::rpc::router::{Region, RegionRoute};
 use common_telemetry::info;

src/common/meta/src/error.rs

@@ -686,8 +686,8 @@ pub enum Error {
     },
 
     #[cfg(feature = "pg_kvbackend")]
-    #[snafu(display("Postgres transaction retry failed"))]
-    PostgresTransactionRetryFailed {
+    #[snafu(display("Rds transaction retry failed"))]
+    RdsTransactionRetryFailed {
         #[snafu(implicit)]
         location: Location,
     },
@@ -814,7 +814,7 @@ impl ErrorExt for Error {
             | CreatePostgresPool { .. }
             | GetPostgresConnection { .. }
             | PostgresTransaction { .. }
-            | PostgresTransactionRetryFailed { .. } => StatusCode::Internal,
+            | RdsTransactionRetryFailed { .. } => StatusCode::Internal,
             Error::DatanodeTableInfoNotFound { .. } => StatusCode::Internal,
         }
     }

src/common/meta/src/kv_backend.rs

@@ -32,7 +32,7 @@ pub mod chroot;
 pub mod etcd;
 pub mod memory;
 #[cfg(feature = "pg_kvbackend")]
-pub mod postgres;
+pub mod rds;
 pub mod test;
 pub mod txn;