1 files changed, 20 insertions, 0 deletions
diff --git a/internal/mapr/setclause.go b/internal/mapr/setclause.go
new file mode 100644
index 0000000..b4c2f73
--- /dev/null
+++ b/internal/mapr/setclause.go
@@ -0,0 +1,20 @@
+package mapr
+
+// SetClause interprets the set clause of the mapreduce query.
+func (q *Query) SetClause(fields map[string]string) error {
+	for _, sc := range q.Set {
+		value, ok := fields[sc.rString]
+		if !ok {
+			continue
+		}
+
+		switch sc.rType {
+		case FunctionStack:
+			fields[sc.lString] = sc.functionStack.Call(value)
+		default:
+			fields[sc.lString] = value
+		}
+	}
+
+	return nil
+}