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| <title>REFRESH FUNCTIONS Statement</title> |
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| <h1 class="title topictitle1" id="ariaid-title1">REFRESH FUNCTIONS Statement</h1> |
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| <p class="p"> |
| In <span class="keyword">Impala 2.9</span> and higher, you can run the <code class="ph codeph">REFRESH |
| FUNCTIONS</code> statement to refresh the user-defined functions (UDFs) created outside |
| of Impala. For example, you can add Java-based UDFs to the metastore database through the |
| Hive <code class="ph codeph">CREATE FUNCTION</code> statements and make those UDFs visible to Impala at |
| the database level by subsequently running <code class="ph codeph">REFRESH FUNCTIONS</code>. |
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| The <code class="ph codeph">REFRESH FUNCTIONS</code> statement is only required if you create or modify |
| UDFs from outside of Impala. Updated metadata, as a result of running <code class="ph codeph">REFRESH |
| FUNCTIONS</code>, is broadcast to all Impala coordinators. |
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| Once issued, the <code class="ph codeph">REFRESH FUNCTIONS</code> statement cannot be cancelled. |
| </p> |
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| <p class="p"> |
| <strong class="ph b">Syntax:</strong> |
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| <span class="ph"><code class="ph codeph">REFRESH FUNCTIONS</code> |
| <var class="keyword varname">db_name</var></span> |
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| <div class="parentlink"><strong>Parent topic:</strong> <a class="link" href="../topics/impala_langref_sql.html">Impala SQL Statements</a></div> |
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