Attached ER diagram. The table chart_has_event is an n:m mapping. Notice that most every table here has a foreign key to
chart_has_event. "entity class from databse" generates a different PK for each of these classes. That is decidedly not
useful. All the classes should use the same class to represent the primary key; then things like "equals" work and the
same PK class works to query multiple tables.

/db/ $ ls *PK*
AspectIdPK.java  ChartHasEventPK.java  PlanetIdPK.java  ProfilesPK.java
AspectsPK.java   EventOrderPK.java     ProfilePK.java
/db/ $ diff ChartHasEventPK.java EventOrderPK.java
30c30
< public class ChartHasEventPK implements Serializable {
---
> public class EventOrderPK implements Serializable {
38c38
<     public ChartHasEventPK() {
---
>     public EventOrderPK() {
41c41
<     public ChartHasEventPK(int chartId, int eventId) {
---
>     public EventOrderPK(int chartId, int eventId) {
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<         if (!(object instanceof ChartHasEventPK)) {
---
>         if (!(object instanceof EventOrderPK)) {
75c75
<         ChartHasEventPK other = (ChartHasEventPK)object;
---
>         EventOrderPK other = (EventOrderPK)object;
87c87
<         return "org.metawb.astro.db.ChartHasEventPK[chartId=" + chartId +
---
>         return "org.metawb.astro.db.EventOrderPK[chartId=" + chartId +