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| <meta name="DC.Title" content="IDLE_SESSION_TIMEOUT Query Option (Impala 2.12 or higher only)" /> |
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| <title>IDLE_SESSION_TIMEOUT Query Option (Impala 2.12 or higher only)</title> |
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| <h1 class="title topictitle1" id="ariaid-title1">IDLE_SESSION_TIMEOUT Query Option (<span class="keyword">Impala 2.12</span> or higher only)</h1> |
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| <div class="body conbody"> |
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| <p class="p"> |
| The <code class="ph codeph">IDLE_SESSION_TIMEOUT</code> query option sets the time in seconds after |
| which an idle session is cancelled. A session is idle when no activity is occurring for |
| any of the queries in that session, and the session has not started any new queries. Once |
| a session is expired, you cannot issue any new query requests to it. The session remains |
| open, but the only operation you can perform is to close it. |
| </p> |
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| <p class="p"> |
| The <code class="ph codeph">IDLE_SESSION_TIMEOUT</code> query option overrides the |
| <code class="ph codeph">‑‑idle_session_timeout</code> startup option. See |
| <a class="xref" href="impala_timeouts.html#timeouts">Setting Timeout Periods for Daemons, Queries, and Sessions</a> for the |
| <code class="ph codeph">‑‑idle_session_timeout</code> startup option. |
| </p> |
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| <p class="p"> |
| The <code class="ph codeph">IDLE_SESSION_TIMEOUT</code> query option allows JDBC/ODBC connections to set |
| the session timeout as a query option with the <code class="ph codeph">SET</code> statement. |
| </p> |
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| <p class="p"> |
| <strong class="ph b">Syntax:</strong> |
| </p> |
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| <pre class="pre codeblock"><code>SET IDLE_SESSION_TIMEOUT=<var class="keyword varname">seconds</var>;</code></pre> |
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| <p class="p"> |
| <strong class="ph b">Type:</strong> numeric |
| </p> |
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| <div class="p"> |
| <strong class="ph b">Default:</strong> 0 |
| <ul class="ul"> |
| <li class="li"> |
| If <code class="ph codeph">‑‑idle_session_timeout</code> is not set, the session never |
| expires. |
| </li> |
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| <li class="li"> |
| If <code class="ph codeph">‑‑idle_session_timeout</code> is set, use that timeout value. |
| </li> |
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| </ul> |
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| </div> |
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| <p class="p"> |
| <strong class="ph b">Added in:</strong> <span class="keyword">Impala 2.12</span> |
| </p> |
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| <p class="p"> |
| <strong class="ph b">Related information:</strong> |
| </p> |
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| <p class="p"> |
| <a class="xref" href="impala_timeouts.html#timeouts">Setting Timeout Periods for Daemons, Queries, and Sessions</a> |
| </p> |
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| </div> |
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| <div class="related-links"> |
| <div class="familylinks"> |
| <div class="parentlink"><strong>Parent topic:</strong> <a class="link" href="../topics/impala_set.html">SET Statement</a></div> |
| </div> |
| </div></body> |
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