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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0; border-collapse: collapse; padding: 0 0 10px"> <p style="margin: 10px 0 0; margin-top: 0">I'm attempting to upgrade to 5.2 and have run into this issue. We were using FieldHandler to allow lazy loading a few properties, but this is no longer available.<br> So I enabled byte code enhancement. But this issue has effectively changed every <many-to-one lazy="proxy"> to behave like <lazy="false">, (which via nested references triggers a massive number of queries).</p> <p style="margin: 10px 0 0">I feel like I'm missing something, because I don't see how this could be the default behavior.<br> Am I doing something wrong?<br> If there anything similar to the old FieldHandler that I can use?<br> Thanks.</p> <p style="margin: 10px 0 0">Simple Beans:</p>
<div class="code panel" style="border-width: 1px;; border: 1px solid #cccccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #cccccc; -moz-border-radius: 3px; border-radius: 3px; margin: 9px 0">
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<pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
@Entity
@Table( name = <span class="code-quote" style="color: #009100">"account_master"</span> )
<span class="code-keyword" style="color: #000091">public</span> <span class="code-keyword" style="color: #000091">class </span>AccountMaster_db {
@Id
@GeneratedValue( strategy = GenerationType.IDENTITY )
@Column( name = <span class="code-quote" style="color: #009100">"id_account_master"</span> )
<span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">Integer</span> idAccountMaster;
@ManyToOne( fetch = FetchType.LAZY )
@LazyToOne( LazyToOneOption.PROXY )
@JoinColumn( name = <span class="code-quote" style="color: #009100">"id_account_type"</span>, nullable = <span class="code-keyword" style="color: #000091">false</span> )
<span class="code-keyword" style="color: #000091">private</span> AccountType_db accountType;
@ManyToOne( fetch = FetchType.LAZY )
@LazyToOne( LazyToOneOption.PROXY )
@JoinColumn( name = <span class="code-quote" style="color: #009100">"id_tax_code_buy"</span> )
<span class="code-keyword" style="color: #000091">private</span> TaxCode_db buyTaxCode;
@ManyToOne( fetch = FetchType.LAZY )
@LazyToOne( LazyToOneOption.PROXY )
@JoinColumn( name = <span class="code-quote" style="color: #009100">"id_tax_code_sell"</span> )
<span class="code-keyword" style="color: #000091">private</span> TaxCode_db sellTaxCode;
@Column( name = <span class="code-quote" style="color: #009100">"code"</span> )
<span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">String</span> code;
@Column( name = <span class="code-quote" style="color: #009100">"name"</span> )
<span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">String</span> name;
@Entity
@Table( name = <span class="code-quote" style="color: #009100">"account_type"</span> )
<span class="code-keyword" style="color: #000091">public</span> <span class="code-keyword" style="color: #000091">class </span>AccountType_db {
@Id
@GeneratedValue( strategy = GenerationType.IDENTITY )
@Column( name = <span class="code-quote" style="color: #009100">"id_account_type"</span> )
<span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">Integer</span> idAccountType;
@Column( name = <span class="code-quote" style="color: #009100">"name"</span>, nullable = <span class="code-keyword" style="color: #000091">false</span> )
<span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">String</span> name;
@Column( name = <span class="code-quote" style="color: #009100">"account_class"</span>, nullable = <span class="code-keyword" style="color: #000091">false</span> )
<span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">Character</span> accountClass;
</pre>
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</div> <p style="margin: 10px 0 0">Load:</p>
<div class="code panel" style="border-width: 1px;; border: 1px solid #cccccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #cccccc; -moz-border-radius: 3px; border-radius: 3px; margin: 9px 0">
<div class="codeContent panelContent" style="padding: 9px 12px">
<pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
AccountMaster_db test = session.find( AccountMaster_db.class, 457 );
</pre>
</div>
</div> <p style="margin: 10px 0 0">Executed SQL:</p>
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<div class="codeContent panelContent" style="padding: 9px 12px">
<pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
select
accountmas0_.id_account_master as id_accou1_0_0_,
accountmas0_.id_account_type as id_accou7_0_0_,
accountmas0_.allow_purchases as allow_pu2_0_0_,
accountmas0_.allow_sales as allow_sa3_0_0_,
accountmas0_.id_tax_code_buy as id_tax_c8_0_0_,
accountmas0_.code as code4_0_0_,
accountmas0_.name as name6_0_0_,
accountmas0_.id_tax_code_sell as id_tax_c9_0_0_
from
account_master accountmas0_
where
accountmas0_.id_account_master=?
select
accounttyp0_.id_account_type as id_accou1_1_0_,
accounttyp0_.account_class as account_2_1_0_,
accounttyp0_.name as name4_1_0_
from
account_type accounttyp0_
where
accounttyp0_.id_account_type=?
select
taxcode_db0_.id_tax_code as id_tax_c1_2_0_,
taxcode_db0_.eid_tax_code as eid_tax_2_2_0_,
taxcode_db0_.name as name3_2_0_
from
tax_code taxcode_db0_
where
taxcode_db0_.id_tax_code=?
select
taxcode_db0_.id_tax_code as id_tax_c1_2_0_,
taxcode_db0_.eid_tax_code as eid_tax_2_2_0_,
taxcode_db0_.name as name3_2_0_
from
tax_code taxcode_db0_
where
taxcode_db0_.id_tax_code=?
</pre>
</div>
</div> <p style="margin: 10px 0 0">I looked into lazy="no-proxy" but that rabbit hole didn't work out:<br> I see that I can change every many-to-one to use lazy="no-proxy", but when I access any property it does 1 query to load all the foreign keys, and then does a separate query for each property's bean to fully populate it.<br> This would then force me to migrate from mappings to Annotations so I can use a separate @LazyGroup for each property.<br> I would also need to migrate every load()/find() to use a query that will left outer join fetch each property I want (or use an EntityGraph).<br> And after all that, when I try to access the property (that was already fetched) it still does an extra query to load the foreign key</p> </td>
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