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diff --git a/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/chr/plan/IterateRelationOp.java b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/chr/plan/IterateRelationOp.java
new file mode 100644
index 000000000..51dcb3762
--- /dev/null
+++ b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/chr/plan/IterateRelationOp.java
@@ -0,0 +1,42 @@
+package org.simantics.scl.compiler.elaboration.chr.plan;
+
+import org.simantics.scl.compiler.compilation.CompilationContext;
+import org.simantics.scl.compiler.elaboration.expressions.Expression;
+import org.simantics.scl.compiler.elaboration.expressions.Variable;
+import org.simantics.scl.compiler.elaboration.relations.SCLRelation;
+import org.simantics.scl.compiler.internal.codegen.writer.CodeWriter;
+
+public class IterateRelationOp extends PlanOp {
+    
+    public SCLRelation relation;
+    public Variable[] variables;
+    public Expression[] expressions;
+    public int boundMask;
+    
+    public IterateRelationOp(long location, SCLRelation relation, Variable[] variables, Expression[] expressions,
+            int boundMask) {
+        super(location);
+        this.relation = relation;
+        this.variables = variables;
+        this.expressions = expressions;
+        this.boundMask = boundMask;
+        
+    }
+
+    @Override
+    public void toString(StringBuilder b) {
+        b.append("ITERATE ").append(relation);
+        for(int i=0;i<expressions.length;++i)
+            if((boundMask & (1 << i)) != 0) {
+                b.append(" (").append(expressions[i]).append(")");
+            }
+            else {
+                b.append(" ").append(variables[i]);
+            }
+    }
+
+    @Override
+    public void generateCode(CompilationContext context, PlanContext planContext, CodeWriter w) {
+        relation.generateIterate(planContext, w, location, boundMask, variables, expressions);
+    }   
+}