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<h2>SqlUpdate</h2>
<p>
<em>SqlUpdate</em> allows us to execute <em>sql insert</em>, <em>sql update</em> or <em>sql delete</em> statements.
</p>
<p> </p>
<h5>Example: simple update</h5>
<div class="syntax java"><div class="highlight"><pre><span></span><span class="n">String</span> <span class="n">sql</span> <span class="o">=</span> <span class="s">"update audit_log set description = description where id = ?"</span><span class="o">;</span>
<span class="kt">int</span> <span class="n">row</span> <span class="o">=</span> <span class="n">DB</span><span class="o">.</span><span class="na">sqlUpdate</span><span class="o">(</span><span class="n">sql</span><span class="o">)</span>
<span class="o">.</span><span class="na">setParameter</span><span class="o">(</span><span class="mi">1</span><span class="o">,</span> <span class="mi">42</span><span class="o">)</span>
<span class="o">.</span><span class="na">execute</span><span class="o">();</span>
</pre></div>
</div>
<p> </p>
<h5>Example: insert with getGeneratedKeys</h5>
<div class="syntax java"><div class="highlight"><pre><span></span><span class="n">String</span> <span class="n">sql</span> <span class="o">=</span> <span class="s">"insert into e_person_online (email, online_status, when_updated) "</span> <span class="o">+</span>
<span class="s">"values (:email, :online, current_time)"</span><span class="o">;</span>
<span class="n">SqlUpdate</span> <span class="n">sqlUpdate</span> <span class="o">=</span> <span class="n">DB</span><span class="o">.</span><span class="na">sqlUpdate</span><span class="o">(</span><span class="n">sql</span><span class="o">)</span>
<span class="o">.</span><span class="na">setGetGeneratedKeys</span><span class="o">(</span><span class="kc">true</span><span class="o">)</span>
<span class="o">.</span><span class="na">setParameter</span><span class="o">(</span><span class="s">"email"</span><span class="o">,</span> <span class="n">email</span><span class="o">)</span>
<span class="o">.</span><span class="na">setParameter</span><span class="o">(</span><span class="s">"online"</span><span class="o">,</span> <span class="kc">false</span><span class="o">);</span>
<span class="n">sqlUpdate</span><span class="o">.</span><span class="na">execute</span><span class="o">();</span>
<span class="n">Object</span> <span class="n">key</span> <span class="o">=</span> <span class="n">sqlUpdate</span><span class="o">.</span><span class="na">getGeneratedKey</span><span class="o">();</span>
</pre></div>
</div>
<p> </p>
<h5>Example: binding list</h5>
<div class="syntax java"><div class="highlight"><pre><span></span><span class="n">String</span> <span class="n">sql</span> <span class="o">=</span> <span class="s">"delete from customer where ref_id in (:ids)"</span><span class="o">;</span>
<span class="kt">int</span> <span class="n">rows</span> <span class="o">=</span> <span class="n">DB</span><span class="o">.</span><span class="na">sqlUpdate</span><span class="o">()</span>
<span class="o">.</span><span class="na">setParameter</span><span class="o">(</span><span class="s">"ids"</span><span class="o">,</span> <span class="n">asList</span><span class="o">(</span><span class="mi">9991</span><span class="o">,</span> <span class="mi">9992</span><span class="o">,</span> <span class="mi">9993</span><span class="o">))</span>
<span class="o">.</span><span class="na">execute</span><span class="o">();</span>
</pre></div>
</div>
<div class="syntax sql"><div class="highlight"><pre><span></span><span class="k">delete</span> <span class="k">from</span> <span class="n">customer</span> <span class="k">where</span> <span class="n">ref_id</span> <span class="k">in</span> <span class="p">(</span><span class="o">?</span><span class="p">,</span><span class="o">?</span><span class="p">,</span><span class="o">?</span><span class="p">)</span>
</pre></div>
</div>
<p> </p>
<h5>Example: binding multiple lists</h5>
<div class="syntax java"><div class="highlight"><pre><span></span><span class="n">String</span> <span class="n">sql</span> <span class="o">=</span> <span class="s">"delete from customer where ref_id in (:ids) and name in (:names)"</span><span class="o">;</span>
<span class="kt">int</span> <span class="n">rows</span> <span class="o">=</span> <span class="n">DB</span><span class="o">.</span><span class="na">sqlUpdate</span><span class="o">(</span><span class="n">sql</span><span class="o">)</span>
<span class="o">.</span><span class="na">setParameter</span><span class="o">(</span><span class="s">"ids"</span><span class="o">,</span> <span class="n">asList</span><span class="o">(</span><span class="mi">9991</span><span class="o">,</span> <span class="mi">9992</span><span class="o">,</span> <span class="mi">9993</span><span class="o">))</span>
<span class="o">.</span><span class="na">setParameter</span><span class="o">(</span><span class="s">"names"</span><span class="o">,</span> <span class="n">asList</span><span class="o">(</span><span class="s">"rob"</span><span class="o">,</span> <span class="s">"jim"</span><span class="o">))</span>
<span class="o">.</span><span class="na">execute</span><span class="o">();</span>
</pre></div>
</div>
<div class="syntax sql"><div class="highlight"><pre><span></span><span class="k">delete</span> <span class="k">from</span> <span class="n">customer</span> <span class="k">where</span> <span class="n">ref_id</span> <span class="k">in</span> <span class="p">(</span><span class="o">?</span><span class="p">,</span><span class="o">?</span><span class="p">,</span><span class="o">?</span><span class="p">)</span> <span class="k">and</span> <span class="n">name</span> <span class="k">in</span> <span class="p">(</span><span class="o">?</span><span class="p">,</span><span class="o">?</span><span class="p">)</span>
</pre></div>
</div>
<h2 id="cte" class="art">CTE - Common table expression</h2>
<p>
When we want to perform a bulk update using a <em>common table expression</em> this is
easiest done using SqlUpdate.
</p>
<h5>CTE Example</h5>
<div class="syntax java"><div class="highlight"><pre><span></span><span class="n">String</span> <span class="n">sql</span> <span class="o">=</span> <span class="s">"""</span>
<span class="s">WITH t AS (</span>
<span class="s"> SELECT s.id AS _id</span>
<span class="s"> FROM store_price s</span>
<span class="s"> JOIN promotion_vw p ...</span>
<span class="s"> WHERE ...</span>
<span class="s">)</span>
<span class="s">UPDATE store_price</span>
<span class="s">SET promotion_price = null, price = active_price, price_reason = ?,</span>
<span class="s"> version = version+1, when_modified = current_timestamp</span>
<span class="s">FROM t</span>
<span class="s">WHERE id = t._id</span>
<span class="s">"""</span>
<span class="kt">int</span> <span class="n">rows</span> <span class="o">=</span> <span class="n">DB</span><span class="o">.</span><span class="na">sqlUpdate</span><span class="o">(</span><span class="n">sql</span><span class="o">)</span>
<span class="o">.</span><span class="na">setParameter</span><span class="o">(</span><span class="mi">1</span><span class="o">,</span> <span class="s">"Expired promotions"</span><span class="o">)</span>
<span class="o">.</span><span class="na">execute</span><span class="o">();</span>
</pre></div>
</div>
<h2 id="addBatch" class="art">AddBatch and ExecuteBatch</h2>
<p>
We use <em>addBatch()</em> and <em>executeBatch()</em> to explicitly use JDBC batching.
</p>
<div class="syntax java"><div class="highlight"><pre><span></span><span class="n">String</span> <span class="n">sql</span> <span class="o">=</span> <span class="s">"insert into audit_log (id, description, modified_description) values (?,?,?)"</span><span class="o">;</span>
<span class="n">SqlUpdate</span> <span class="n">insert</span> <span class="o">=</span> <span class="n">DB</span><span class="o">.</span><span class="na">sqlUpdate</span><span class="o">(</span><span class="n">sql</span><span class="o">);</span>
<span class="k">try</span> <span class="o">(</span><span class="n">Transaction</span> <span class="n">txn</span> <span class="o">=</span> <span class="n">DB</span><span class="o">.</span><span class="na">beginTransaction</span><span class="o">())</span> <span class="o">{</span>
<span class="n">insert</span><span class="o">.</span><span class="na">setNextParameter</span><span class="o">(</span><span class="mi">10000</span><span class="o">);</span>
<span class="n">insert</span><span class="o">.</span><span class="na">setNextParameter</span><span class="o">(</span><span class="s">"hello"</span><span class="o">);</span>
<span class="n">insert</span><span class="o">.</span><span class="na">setNextParameter</span><span class="o">(</span><span class="s">"foo"</span><span class="o">);</span>
<span class="n">insert</span><span class="o">.</span><span class="na">addBatch</span><span class="o">();</span>
<span class="n">insert</span><span class="o">.</span><span class="na">setNextParameter</span><span class="o">(</span><span class="mi">10001</span><span class="o">);</span>
<span class="n">insert</span><span class="o">.</span><span class="na">setNextParameter</span><span class="o">(</span><span class="s">"goodbye"</span><span class="o">);</span>
<span class="n">insert</span><span class="o">.</span><span class="na">setNextParameter</span><span class="o">(</span><span class="s">"bar"</span><span class="o">);</span>
<span class="n">insert</span><span class="o">.</span><span class="na">addBatch</span><span class="o">();</span>
<span class="n">insert</span><span class="o">.</span><span class="na">setNextParameter</span><span class="o">(</span><span class="mi">10002</span><span class="o">);</span>
<span class="n">insert</span><span class="o">.</span><span class="na">setNextParameter</span><span class="o">(</span><span class="s">"chow"</span><span class="o">);</span>
<span class="n">insert</span><span class="o">.</span><span class="na">setNextParameter</span><span class="o">(</span><span class="s">"baz"</span><span class="o">);</span>
<span class="n">insert</span><span class="o">.</span><span class="na">addBatch</span><span class="o">();</span>
<span class="kt">int</span><span class="o">[]</span> <span class="n">rows</span> <span class="o">=</span> <span class="n">insert</span><span class="o">.</span><span class="na">executeBatch</span><span class="o">();</span>
<span class="n">txn</span><span class="o">.</span><span class="na">commit</span><span class="o">();</span>
<span class="o">}</span>
</pre></div>
</div>
<h2 id="upsert" class="art">Upsert</h2>
<p>
We can execute upsert sql which is generally database specific.
</p>
<h4>Upsert - Postgres</h4>
<div class="syntax java"><div class="highlight"><pre><span></span><span class="n">String</span> <span class="n">sql</span> <span class="o">=</span>
<span class="s">"insert into e_person_online (email, online_status, when_updated) values (?, ?, now()) "</span> <span class="o">+</span>
<span class="s">"on conflict (email) do update set when_updated=now(), online_status = ?"</span><span class="o">;</span>
<span class="n">String</span> <span class="n">email</span> <span class="o">=</span> <span class="s">"foo@one.com"</span><span class="o">;</span>
<span class="n">Object</span> <span class="n">key</span> <span class="o">=</span> <span class="n">DB</span><span class="o">.</span><span class="na">sqlUpdate</span><span class="o">(</span><span class="n">sql</span><span class="o">)</span>
<span class="o">.</span><span class="na">setGetGeneratedKeys</span><span class="o">(</span><span class="kc">true</span><span class="o">)</span>
<span class="o">.</span><span class="na">setParameter</span><span class="o">(</span><span class="mi">1</span><span class="o">,</span> <span class="n">email</span><span class="o">)</span>
<span class="o">.</span><span class="na">setParameter</span><span class="o">(</span><span class="mi">2</span><span class="o">,</span> <span class="kc">true</span><span class="o">)</span>
<span class="o">.</span><span class="na">setParameter</span><span class="o">(</span><span class="mi">3</span><span class="o">,</span> <span class="kc">true</span><span class="o">)</span>
<span class="o">.</span><span class="na">executeGetKey</span><span class="o">();</span>
</pre></div>
</div>
<p> </p>
<h4>Upsert - MySql</h4>
<div class="syntax java"><div class="highlight"><pre><span></span><span class="n">String</span> <span class="n">email</span> <span class="o">=</span> <span class="s">"bar@one.com"</span><span class="o">;</span>
<span class="n">String</span> <span class="n">sql</span> <span class="o">=</span>
<span class="s">"insert into e_person_online (email, online_status, when_updated) values (?, ?, current_time) "</span> <span class="o">+</span>
<span class="s">"on duplicate key update when_updated=current_time, online_status = ?"</span><span class="o">;</span>
<span class="n">Object</span> <span class="n">key</span> <span class="o">=</span> <span class="n">DB</span><span class="o">.</span><span class="na">sqlUpdate</span><span class="o">(</span><span class="n">sql</span><span class="o">)</span>
<span class="o">.</span><span class="na">setGetGeneratedKeys</span><span class="o">(</span><span class="kc">true</span><span class="o">)</span>
<span class="o">.</span><span class="na">setParameter</span><span class="o">(</span><span class="mi">1</span><span class="o">,</span> <span class="n">email</span><span class="o">)</span>
<span class="o">.</span><span class="na">setParameter</span><span class="o">(</span><span class="mi">2</span><span class="o">,</span> <span class="kc">true</span><span class="o">)</span>
<span class="o">.</span><span class="na">setParameter</span><span class="o">(</span><span class="mi">3</span><span class="o">,</span> <span class="kc">true</span><span class="o">)</span>
<span class="o">.</span><span class="na">executeGetKey</span><span class="o">();</span>
</pre></div>
</div>
<h2 id="l2cache" class="art">L2 cache</h2>
<p>
If L2 caching is being used Ebean will by default automatically try and determine what
table modifications are performed and use this to invalidate appropriate parts of the L2 cache.
</p>
<p>
Use <code>setAutoTableMod(false)</code> to turn this off.
</p>
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