Query cache bug, which produces wrong results (#1584)

src/test/java/org/tests/query/cache/Position.java

@@ -0,0 +1,32 @@
+package org.tests.query.cache;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+import javax.persistence.ManyToOne;
+
+@Entity
+public class Position {
+	@Id
+	@GeneratedValue
+	protected Long id;
+
+	@ManyToOne(cascade = {}, optional = false)
+	private Contract contract;
+
+	public Long getId() {
+		return id;
+	}
+
+	public void setId(final Long id) {
+		this.id = id;
+	}
+
+	public Contract getContract() {
+		return contract;
+	}
+
+	public void setContract(final Contract contract) {
+		this.contract = contract;
+	}
+}