add: relay api endpoints

helpers/create_sql_filtered_query.cc

@@ -46,4 +46,13 @@ helpers::create_sql_filtered_query(const char *sql, sql_filter_builder **filters
     }
 
     return stmt;
+}
+
+helpers::sql_filter_builder::sql_filter_builder(const char *col_name, const void *value, intptr_t bind_func,
+                                                const char *logic)
+{
+    this->col_name = col_name;
+    this->value = value;
+    this->bind_func = bind_func;
+    this->logic = logic;
 }