How do I do a query like this using HibernateDaoSupport?
Hi,
I have a USERLOG table and an ACTIVITY table. the relationship is one-to-many respectively.
USERLOG has a primary key made up of userid and date fields.
ACITITY has a foreign key made up of userid and date fields
and a primary key made up of userid, date and taskno fields
So, any user can have many entries in ACTIVITY table on a given date.
How do I do query like this in HibernateDaoSupport?
I want to query total count of taskno and group by taskno
SELECT taskno, count(taskno) from ACTIVITY group by taskno order by taskno
Mapping files
Code:
<hibernate-mapping>
<class
name="com.test.model.Userlog" >
table="evalogs"
<composite-id name="comp_id" class="com.test.model.UserlogPK" unsaved-value="any">
<meta attribute="field-description" inherit="false">
@hibernate.id
generator-class="assigned"
</meta>
<key-property
name="userid"
column="userid"
type="java.lang.Integer"
length="4"
>
</key-property>
<key-property
name="date"
column="date"
type="java.lang.String"
length="10"
>
</key-property>
</composite-id>
<!-- Associations -->
<!-- derived association(s) for compound key -->
<!-- end of derived association(s) -->
<!-- bi-directional one-to-many association to Activity -->
<set
name="activity"
lazy="true"
inverse="true"
cascade="all"
>
<key>
<column name="userid" />
<column name="date" />
</key>
<one-to-many
class="com.test.model.Activity"
/>
</set>
</class>
</hibernate-mapping>
<hibernate-mapping>
<class
name="com.test.model.Activity"
table="activity"
>
<composite-id name="comp_id" class="com.test.model.ActivityPK" unsaved-value="any">
<meta attribute="field-description" inherit="false">
@hibernate.id
generator-class="assigned"
</meta>
<key-property
name="userid"
column="userid"
type="java.lang.Integer"
length="4"
>
</key-property>
<key-property
name="date"
column="date"
type="java.lang.String"
length="10"
>
</key-property>
<key-property
name="taskNo"
column="taskno"
type="java.lang.Integer"
length="4"
>
</key-property>
</composite-id>
<!-- Associations -->
<!-- derived association(s) for compound key -->
<!-- bi-directional many-to-one association to Userlog -->
<many-to-one
name="Userlog"
class="com.test.model.Userlog"
update="false"
insert="false"
>
<meta attribute="field-description">
@hibernate.many-to-one
update="false"
insert="false"
</meta>
<meta attribute="field-description">
@hibernate.column
name="date"
</meta>
<meta attribute="field-description">
@hibernate.column
name="userid"
</meta>
<column name="userid" />
<column name="date" />
</many-to-one>
<!-- end of derived association(s) -->
</class>
</hibernate-mapping>
Re: How do I do a query like this using HibernateDaoSupport?
Quote:
Originally Posted by theone
Hi,
I have a USERLOG table and an ACTIVITY table. the relationship is one-to-many respectively.
I think this a pretty much HIbernate speciifc problem, so best asked on the hibernate forum. The HibernateDaoSupport is really a Spring convenience wrapper to calling hibernate code, your problem seems to be purely hibernate related.
