Question

I am importing stock quotes data using HibernateTemplate + SpringFramework

Format of the data

AAPL,09-Jun-2010 09:00,251.47,251.47,251.39,251.39,640
AAPL,09-Jun-2010 09:01,251.4,251.4,251.05,251.26,6844
INTC,09-Jun-2010 09:00,251.47,251.47,251.39,251.39,640
INTC,09-Jun-2010 09:01,251.4,251.4,251.05,251.26,6844
MSFT,09-Jun-2010 09:00,251.47,251.47,251.39,251.39,640
MSFT,09-Jun-2010 09:01,251.4,251.4,251.05,251.26,6844

I have one Entity class called Stock

@Entity
public class Stock implements Serializable {
public Stock() {}

private Long id;
private BigDecimal open;
    .... close,high, low..etc
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
public Long getId() {
    ....

My problem with this setup is that hibernate will put everything into a table called “Stock”.

I want to separate different stock into a different table, so with the data above I will end up having 3 tables (AAPL, MSFT, INTC)

Is there an easy way to do this without resorting to hand-written sql statement in Hibernate/HibernateTemplate? sort of creating the table dynamically?

Environment:
– Mysql, Hibernate3.5.3, springframework3.0

Answer 1

I want to separate different stock into a different table, so with the data above I will end up having 3 tables (AAPL, MSFT, INTC)

Then either introduce an inheritance hierarchy (with a JOINED or TABLE_PER_CLASS strategy) and persist the appropriate sub type or maybe use horizontal partitioning (this would require some testing though, I’ve never done that with MySQL and Hibernate).