ble_cache_ok ORDER BY a;
 a
---
 1
 2
 3
(3 rows)
</pre>

<!-- -------------------------------------------------------------------------------- -->

<h2 id="basic_try">试用查询缓存</h2>

<p>执行一个 SELECT 语句。</p>
<pre>test=&gt; SELECT * FROM table_cache_ok WHERE a = 1;
 a
---
 1
(1 row)
</pre>

<p>log_per_node_statement 的输出显示 SELECT 语句被实际执行了。</p>
<pre>LOG:   DB node id: 0 backend pid: 11203 statement: SELECT * FROM table_cache_ok WHERE a = 1;
</pre>

<p>再次执