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Change-Id: I2124e14900d0f82569c061cc46006447bb054b36 Reviewed-on: http://gerrit.cloudera.org:8080/10339 Reviewed-by: Vuk Ercegovac <vercegovac@cloudera.com> Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>
79 lines
2.7 KiB
XML
79 lines
2.7 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!--
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Licensed to the Apache Software Foundation (ASF) under one
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or more contributor license agreements. See the NOTICE file
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distributed with this work for additional information
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regarding copyright ownership. The ASF licenses this file
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to you under the Apache License, Version 2.0 (the
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"License"); you may not use this file except in compliance
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with the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing,
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software distributed under the License is distributed on an
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"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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KIND, either express or implied. See the License for the
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specific language governing permissions and limitations
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under the License.
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-->
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<!DOCTYPE concept PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
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<concept id="refresh">
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<title>REFRESH FUNCTIONS Statement</title>
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<titlealts audience="PDF">
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<navtitle>REFRESH FUNCTIONS</navtitle>
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</titlealts>
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<prolog>
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<metadata>
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<data name="Category" value="Impala"/>
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<data name="Category" value="SQL"/>
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<data name="Category" value="DDL"/>
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<data name="Category" value="Tables"/>
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<data name="Category" value="Hive"/>
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<data name="Category" value="Metastore"/>
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<data name="Category" value="ETL"/>
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<data name="Category" value="Ingest"/>
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<data name="Category" value="Developers"/>
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<data name="Category" value="Data Analysts"/>
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</metadata>
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</prolog>
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<conbody>
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<p>
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In <keyword keyref="impala29_full"/> and higher, you can run the <codeph>REFRESH
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FUNCTIONS</codeph> statement to refresh the user-defined functions (UDFs) created outside
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of Impala. For example, you can add Java-based UDFs to the metastore database through the
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Hive <codeph>CREATE FUNCTION</codeph> statements and make those UDFs visible to Impala at
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the database level by subsequently running <codeph>REFRESH FUNCTIONS</codeph>.
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</p>
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<p>
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The <codeph>REFRESH FUNCTIONS</codeph> statement is only required if you create or modify
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UDFs from outside of Impala. Updated metadata, as a result of running <codeph>REFRESH
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FUNCTIONS</codeph>, is broadcast to all Impala coordinators.
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</p>
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<p>
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Once issued, the <codeph>REFRESH FUNCTIONS</codeph> statement cannot be cancelled.
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</p>
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<p conref="../shared/impala_common.xml#common/syntax_blurb">
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<ph rev="2.9.0 IMPALA-5259"> <codeph>REFRESH FUNCTIONS <varname>db_name</varname></codeph>
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</ph>
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</p>
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<p>
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<ph rev="2.9.0 IMPALA-5259"><codeph>REFRESH FUNCTIONS</codeph>
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<varname>db_name</varname></ph>
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</p>
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</conbody>
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</concept>
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