diff --git a/mithril-aggregator/src/database/query/pending_certificate/delete_pending_certificate.rs b/mithril-aggregator/src/database/query/pending_certificate/delete_pending_certificate.rs
index a5515509b79..177ad543de3 100644
--- a/mithril-aggregator/src/database/query/pending_certificate/delete_pending_certificate.rs
+++ b/mithril-aggregator/src/database/query/pending_certificate/delete_pending_certificate.rs
@@ -25,14 +25,7 @@ impl Query for DeletePendingCertificateRecordQuery {
     fn get_definition(&self, condition: &str) -> String {
         // it is important to alias the fields with the same name as the table
         // since the table cannot be aliased in a RETURNING statement in SQLite.
-
-        // let projection = Self::Entity::get_projection().expand(SourceAlias::new(&[(
-        //     "{:pending_certificate:}",
-        //     "pending_certificate",
-        // )]));
-        let projection = Self::Entity::get_projection_with_table("pending_certificate")
-            .expand(SourceAlias::new(&[]));
-
+        let projection = Self::Entity::expand_projection("pending_certificate");
         format!("delete from pending_certificate where {condition} returning {projection}")
     }
 }
diff --git a/mithril-aggregator/src/database/query/pending_certificate/get_pending_certificate.rs b/mithril-aggregator/src/database/query/pending_certificate/get_pending_certificate.rs
index aa4144dd8d5..a223f5ed246 100644
--- a/mithril-aggregator/src/database/query/pending_certificate/get_pending_certificate.rs
+++ b/mithril-aggregator/src/database/query/pending_certificate/get_pending_certificate.rs
@@ -23,10 +23,7 @@ impl Query for GetPendingCertificateRecordQuery {
     }
 
     fn get_definition(&self, condition: &str) -> String {
-        // let aliases = SourceAlias::new(&[("{:pending_certificate:}", "new_pending_certificate")]);
-        // let projection = Self::Entity::get_projection().expand(aliases);
-        let projection = Self::Entity::get_projection_with_table("pending_certificate")
-            .expand(SourceAlias::new(&[]));
+        let projection = Self::Entity::expand_projection("pending_certificate");
         format!(
             // TODO check the order to keep
             "select {projection} from pending_certificate where {condition} order by ROWID desc"
diff --git a/mithril-aggregator/src/database/query/pending_certificate/save_pending_certificate.rs b/mithril-aggregator/src/database/query/pending_certificate/save_pending_certificate.rs
index 1e0bef5c77e..019d298fa47 100644
--- a/mithril-aggregator/src/database/query/pending_certificate/save_pending_certificate.rs
+++ b/mithril-aggregator/src/database/query/pending_certificate/save_pending_certificate.rs
@@ -36,13 +36,7 @@ impl Query for SavePendingCertificateRecordQuery {
         // it is important to alias the fields with the same name as the table
         // since the table cannot be aliased in a RETURNING statement in SQLite.
 
-        // let projection = Self::Entity::get_projection().expand(SourceAlias::new(&[(
-        //     "{:pending_certificate:}",
-        //     "pending_certificate",
-        // )]));
-        let projection = Self::Entity::get_projection_with_table("pending_certificate")
-            .expand(SourceAlias::new(&[]));
-
+        let projection = Self::Entity::expand_projection("pending_certificate");
         format!("insert or replace into pending_certificate {condition} returning {projection}")
     }
 }
diff --git a/mithril-aggregator/src/database/record/certificate_pending.rs b/mithril-aggregator/src/database/record/certificate_pending.rs
index 226564d1080..f2e87d4a98f 100644
--- a/mithril-aggregator/src/database/record/certificate_pending.rs
+++ b/mithril-aggregator/src/database/record/certificate_pending.rs
@@ -15,15 +15,10 @@ pub struct CertificatePendingRecord {
 }
 
 impl CertificatePendingRecord {
-    /// Construct a [Projection] that will allow to hydrate this `CertificatePendingRecord`.
-    pub fn get_projection_with_table(table: &str) -> Projection {
-        let mut projection = Projection::default();
-
-        projection.add_field("epoch", &format!("{table}.epoch"), "integer");
-        projection.add_field("certificate", &format!("{table}.certificate"), "text");
-        projection.add_field("created_at", &format!("{table}.created_at"), "text");
-
-        projection
+    /// Construct a [Projection] that will allow to hydrate this `CertificatePendingRecord` and expend table alias.
+    pub fn expand_projection(table: &str) -> Projection {
+        let aliases = SourceAlias::new(&[("{:pending_certificate:}", table)]);
+        Self::get_projection().expand(aliases);
     }
 }
 
@@ -56,7 +51,13 @@ impl SqLiteEntity for CertificatePendingRecord {
     }
 
     fn get_projection() -> Projection {
-        Self::get_projection_with_table("{:pending_certificate:}")
+        let mut projection = Projection::default();
+
+        projection.add_field("epoch", "{:pending_certificate:}.epoch", "integer");
+        projection.add_field("certificate", "{:pending_certificate:}.certificate", "text");
+        projection.add_field("created_at", "{:pending_certificate:}.created_at", "text");
+
+        projection
     }
 }