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POHow to delete child table records during the update of parent table using Hibernate
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  1. POHow to delete child table records during the update of parent table using Hibernate
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    copied!<p>I have a Parent Table A and child tables B,C with many to one relations.</p> <p>Lets say I have data like, for primary key 1 in parent table A I have 3 rows in child table B and 4 rows in child table C.</p> <p>Now if I want to delete the rows of the child table during an update of the parent table(that means Now, I want to update the table only with one row in each child tables and delete the other rows in them) then how to handle this scenario in hibernate?</p> <p><strong>Update</strong></p> <p>Firstly, sorry that my question was unclear. Here are more details of it.</p> <p>I have a parent table Policy</p> <pre><code>CREATE TABLE "DEV2"."POLICY" ( "POLICY_OID" NUMBER(38,0) NOT NULL ENABLE, "CREATED_DATE" TIMESTAMP (0) NOT NULL ENABLE, "EFFECTIVE_DATE" TIMESTAMP (0), "UPDATED_DATE" TIMESTAMP (0), "STATUS" VARCHAR2(32 BYTE), CONSTRAINT "PK128" PRIMARY KEY ("POLICY_OID") , CONSTRAINT "REFPOLICY_CLASS290" FOREIGN KEY ("POLICY_CLASS") REFERENCES "DEV2"."POLICY_CLASS" ("POLICY_CLASS_REF") ENABLE ) </code></pre> <p>and @OneToMany relation to child table POLICY_RELATIONSHIP</p> <pre><code>CREATE TABLE "DEV2"."POLICY_RELATIONSHIP" ( "POLICY_RELATIONSHIP_OID" NUMBER(38,0) NOT NULL ENABLE, "POLICY_ACTOR" NUMBER(38,0) NOT NULL ENABLE, "POLICY_ACTOR_TYPE" VARCHAR2(32 BYTE) NOT NULL ENABLE, "POLICY_OID" NUMBER(38,0) NOT NULL ENABLE, CONSTRAINT "PK156" PRIMARY KEY ("POLICY_RELATIONSHIP_OID") , CONSTRAINT "REFPOLICY338" FOREIGN KEY ("POLICY_OID") REFERENCES "DEV2"."POLICY" ("POLICY_OID") ENABLE) </code></pre> <p>For Example, I have the sample data something like this.</p> <pre><code>POLICY_OID CREATED_DATE EFFECTIVE_DATE STATUS UPDATED_DATE 1234 06/14/2020 06/14/2010 active 06/14/2010 POLICY_RELATIONSHIP_OID POLICY_ACTOR POLICY_ACTOR_TYPE POLICY_OID 98765 John Primary User 1234 98766 Bill Secondary User 1234 98767 Mary Intermediate User 1234 </code></pre> <p>If I try to persist the Policy Object 1234 and UPDATED_DATE changed to 06/15/2010 and the PolicyRelationship has data like below</p> <pre><code>POLICY_RELATIONSHIP_OID POLICY_ACTOR POLICY_ACTOR_TYPE POLICY_OID null George Primary User 1234 </code></pre> <p>Is there any possible way with hibernate, to delete the three rows which already exist in the PolicyRelation table and insert an new row with new Data.</p> <p>Please let me know if my problem is still unclear.</p> <p>My Environment:</p> <p>Java 1.6, Hibernate 3.5, JBoss.</p>
 

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