2019-08-19 02:17:50 -04:00
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---
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layout: global
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title: SET
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displayTitle: SET
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license: |
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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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, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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---
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2019-09-17 17:36:56 -04:00
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### Description
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The SET command sets a property, returns the value of an existing property or returns all SQLConf properties with value and meaning.
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### Syntax
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{% highlight sql %}
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SET
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SET [ -v ]
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SET property_key[ = property_value ]
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{% endhighlight %}
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### Parameters
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<dl>
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<dt><code><em>-v</em></code></dt>
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<dd>Outputs the key, value and meaning of existing SQLConf properties.</dd>
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</dl>
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<dl>
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<dt><code><em>property_key</em></code></dt>
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<dd>Returns the value of specified property key.</dd>
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</dl>
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<dl>
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<dt><code><em>property_key=property_value</em></code></dt>
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<dd>Sets the value for a given property key. If an old value exists for a given property key, then it gets overridden by the new value.</dd>
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</dl>
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### Examples
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{% highlight sql %}
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-- Set a property.
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SET spark.sql.variable.substitute=false;
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-- List all SQLConf properties with value and meaning.
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SET -v;
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-- List all SQLConf properties with value for current session.
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SET;
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-- List the value of specified property key.
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SET spark.sql.variable.substitute;
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+--------------------------------+--------+
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| key | value |
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+--------------------------------+--------+
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| spark.sql.variable.substitute | false |
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+--------------------------------+--------+
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{% endhighlight %}
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### Related Statements
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- [RESET](sql-ref-syntax-aux-conf-mgmt-reset.html)
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