diff --git a/src/postgres/base-pg-store.ts b/src/postgres/base-pg-store.ts
index 5ce3623..b85eafe 100644
--- a/src/postgres/base-pg-store.ts
+++ b/src/postgres/base-pg-store.ts
@@ -29,7 +29,8 @@ export abstract class BasePgStore {
     const sqlContext = sqlTransactionContext.getStore();
     return sqlContext ? sqlContext[dbName] : this._sql;
   }
-  private readonly _sql: PgSqlClient;
+  /** The raw SQL client instance. */
+  readonly _sql: PgSqlClient;
 
   constructor(sql: PgSqlClient) {
     this._sql = sql;