Hi Klaus,

this could happen the first time a sequence was used, e.g. SequenceManager doesn't accept 0 as PK value and obtain a new PK value from the DB.

Here is an example:

First time call (DB sequence does not exist, OJB create it on the fly)

1080055631853|150|0|statement||select SEQ_SALAD.nextval from dual
1080055631853|0|0|statement||drop sequence SEQ_SALAD
1080055631853|0|0|statement||create sequence SEQ_SALAD
1080055631953|100|0|statement||select SEQ_SALAD.nextval from dual
1080055632033|0|0|statement|INSERT INTO FISH (foodId,name,calories,typeOfWater) VALUES (?,?,?,?) |INSERT INTO FISH (foodId,name,calories,typeOfWater) VALUES ('1','NEW FISH','0','')
1080055632053|0|0|commit||
1080055632053|0|0|statement||select SEQ_SALAD.nextval from dual
1080055632063|0|0|statement|INSERT INTO FISH (foodId,name,calories,typeOfWater) VALUES (?,?,?,?) |INSERT INTO FISH (foodId,name,calories,typeOfWater) VALUES ('2','MORE NEW FISH!','0','')
1080055632063|0|0|commit||


run the test again (sequence already established in DB)

1080055974686|100|0|statement||select SEQ_SALAD.nextval from dual
1080055974776|10|0|statement|INSERT INTO FISH (foodId,name,calories,typeOfWater) VALUES (?,?,?,?) |INSERT INTO FISH (foodId,name,calories,typeOfWater) VALUES ('3','NEW FISH','0','')
1080055974796|10|0|commit||
1080055974796|0|0|statement||select SEQ_SALAD.nextval from dual
1080055974796|0|0|statement|INSERT INTO FISH (foodId,name,calories,typeOfWater) VALUES (?,?,?,?) |INSERT INTO FISH (foodId,name,calories,typeOfWater) VALUES ('4','MORE NEW FISH!','0','')
1080055974796|0|0|commit||


regards,
Armin

Richarz, Klaus (Computer Service) wrote:
Hi,

I am using OJB 1.0rc5 with Oracle8. When I try to store a simple object, the following SQL queries are executed (p6spy.log):

1080045456718|15|0|statement||select TURBINE_USER_SEQ.nextval from dual
1080045456843|0|0|statement|SELECT LAST_NAME,LOGIN_NAME,FIRST_NAME,USER_ID,PASSWORD_VALUE,EMAIL FROM TURBINE_USER WHERE USER_ID = ? |SELECT LAST_NAME,LOGIN_NAME,FIRST_NAME,USER_ID,PASSWORD_VALUE,EMAIL FROM TURBINE_USER WHERE USER_ID = '40049' 1080045456859|16|0|statement||select TURBINE_USER_SEQ.nextval from dual
1080045457265|406|0|statement|INSERT INTO TURBINE_USER (USER_ID,EMAIL,FIRST_NAME,LAST_NAME,LOGIN_NAME,PASSWORD_VALUE) VALUES (?,?,?,?,?,?) |INSERT INTO TURBINE_USER (USER_ID,EMAIL,FIRST_NAME,LAST_NAME,LOGIN_NAME,PASSWORD_VALUE) VALUES ('40050','','Klaus','Richarz','neu01','BxlwjRzIFIOb2Bj9wn1EZlLw')


Why is "select TURBINE_USER_SEQ.nextval from dual" executed two times ?

repository.xml (snippet)

<class-descriptor
    class="de.[...].PortalUserVO"
    table="TURBINE_USER"

    <field-descriptor
        name="id"
        column="USER_ID"
        jdbc-type="BIGINT"
        primarykey="true"
        autoincrement="true"
        sequence-name="TURBINE_USER_SEQ"
    >
    </field-descriptor>
    <field-descriptor
        name="email"
        column="EMAIL"
        jdbc-type="VARCHAR"
        length="99"
    >
    </field-descriptor>
    <field-descriptor
        name="firstName"
        column="FIRST_NAME"
        jdbc-type="VARCHAR"
        length="99"
    >
    </field-descriptor>
    <field-descriptor
        name="lastName"
        column="LAST_NAME"
        jdbc-type="VARCHAR"
        length="99"
    >
    </field-descriptor>
    <field-descriptor
        name="loginName"
        column="LOGIN_NAME"
        jdbc-type="VARCHAR"
        length="32"
    >
    </field-descriptor>
    <field-descriptor
        name="password"
        column="PASSWORD_VALUE"
        jdbc-type="VARCHAR"
        length="32"
    >
    </field-descriptor>
    <reference-descriptor
        name="ldapProfile"
        class-ref="de.[...].LDAPProfileVO"
    >
        <foreignkey field-ref="id"/>
    </reference-descriptor>
</class-descriptor>


Thanks in advance,


Klaus Richarz
Hamburger Berater Team GmbH
Hamburg, Germany



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