### 6.2. `COMMIT` flush

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JPA also defines a COMMIT flush mode, which is described as follows:

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> <div class="paragraph">

If `FlushModeType.COMMIT` is set, the effect of updates made to entities in the persistence context upon queries is unspecified.

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<div class="attribution">
&#8212; Section 3.10.8 of the JPA 2.1 Specification
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<div class="paragraph">

When executing a JPQL query, the persistence context is only flushed when the current running transaction is committed.

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<div id="flushing-commit-flush-jpql-example" class="exampleblock">
<div class="title">Example 268. `COMMIT` flushing on JPQL</div>
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<div class="listingblock">
<div class="content">
<pre class="prettyprint highlight">`Person person = new Person("John Doe");
entityManager.persist(person);

entityManager.createQuery("select p from Advertisement p")
    .setFlushMode( FlushModeType.COMMIT)
    .getResultList();

entityManager.createQuery("select p from Person p")
    .setFlushMode( FlushModeType.COMMIT)
    .getResultList();`</pre>
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<div class="listingblock">
<div class="content">
<pre class="prettyprint highlight">`SELECT a.id AS id1_0_ ,
       a.title AS title2_0_
FROM   Advertisement a

SELECT p.id AS id1_1_ ,
       p.name AS name2_1_
FROM   Person p

INSERT INTO Person (name, id) VALUES ('John Doe', 1)`</pre>
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<div class="paragraph">

Because the JPA doesn&#8217;t impose a strict rule on delaying flushing, when executing a native SQL query, the persistence context is going to be flushed.

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<div id="flushing-commit-flush-sql-example" class="exampleblock">
<div class="title">Example 269. `COMMIT` flushing on SQL</div>
<div class="content">
<div class="listingblock">
<div class="content">
<pre class="prettyprint highlight">`Person person = new Person("John Doe");
entityManager.persist(person);

assertTrue(((Number) entityManager
    .createNativeQuery("select count(*) from Person")
    .getSingleResult()).intValue() == 1);`</pre>
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<div class="listingblock">
<div class="content">
<pre class="prettyprint highlight">`INSERT INTO Person (name, id) VALUES ('John Doe', 1)

SELECT COUNT(*) FROM Person`</pre>
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<div class="sect2">