Hey!
I'm trying to extend my database program with a function to execute any hql query. I'm almost done with it but I get an error on the following process.
Code:
select p.reviews, p.title from Product p
This hql query is converted in an sql query as following:
Code:
Hibernate: select . as col_0_0_, product0_.title as col_1_0_, reviews1_.account_number as account_1_2_, reviews1_.product_id as product_2_2_, reviews1_.points as points3_2_, reviews1_.review as review4_2_ from dbprak12.view_product_meta product0_ inner join dbprak12.view_customer_evaluates reviews1_ on product0_.product_id=reviews1_.product_id
As you can obviously see, there will be thrown an error with sql state code 42601. Because " . as col_0_0_..." isn't correct syntax. But I don't understand why hibernate creates this sql query.
I use the following two xml mappings:
Product.hbm.xml
Code:
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="media.definitions.Product" table="dbprak12.view_product_meta">
<id name="asin" column="product_id">
<generator class="native" />
</id>
<property name="title" column="title" />
<property name="avgRating" column="rating" />
<property name="salesRank" column="sales_rank" />
<property name="picUrl" column="picture" />
<set name="reviews" cascade="all" inverse="true" lazy="true">
<key column="product_id" />
<one-to-many class="media.definitions.Review" />
</set>
<set name="categories" table="dbprak12.view_product_in_category" inverse="false" lazy="true" fetch="select" cascade="all">
<key column="product_id" />
<many-to-many column="category_id" class="media.definitions.Category" />
</set>
<joined-subclass name="media.definitions.Book" table="dbprak12.view_book">
<key column="product_id" />
<property name="isbn" column="isbn" />
<property name="publishers" column="publisher" />
<property name="pubDate" column="publication" />
<property name="pages" column="pages" />
</joined-subclass>
<joined-subclass name="media.definitions.DVD" table="dbprak12.view_dvd">
<key column="product_id" />
<property name="format" column="fformat" />
<property name="regionCode" column="region_code" />
<property name="runningTime" column="running_time" />
</joined-subclass>
<joined-subclass name="media.definitions.Music" table="dbprak12.view_cd">
<key column="product_id" />
<property name="labels" column="label" />
<property name="releaseDate" column="release_date" />
</joined-subclass>
</class>
</hibernate-mapping>
Review.hbm.xml
Code:
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="media.definitions.Review" table="dbprak12.view_customer_evaluates">
<composite-id>
<key-property name="accountNumber" column="account_number" />
<key-many-to-one name="product" class="media.definitions.Product" lazy="false">
<column name="product_id"></column>
</key-many-to-one>
</composite-id>
<property name="rating" column="points" />
<property name="content" column="review" />
</class>
</hibernate-mapping>
I hope, that someone can help me. Thanks in advance!
Lukas
Login
FAQ
Search