utils_sql.go: add sqlScanner interface

api/utils_sql.go

@@ -0,0 +1,11 @@
+package main
+
+import ()
+
+// scanner is a database/sql abstraction interface that can be used with both
+// *sql.Row and *sql.Rows.
+type sqlScanner interface {
+	// Scan copies columns from the underlying query row(s) to the values
+	// pointed to by dest.
+	Scan(dest ...interface{}) error
+}