0001 ---
0002 layout: global
0003 title: UNCACHE TABLE
0004 displayTitle: UNCACHE TABLE
0005 license: |
0006 Licensed to the Apache Software Foundation (ASF) under one or more
0007 contributor license agreements. See the NOTICE file distributed with
0008 this work for additional information regarding copyright ownership.
0009 The ASF licenses this file to You under the Apache License, Version 2.0
0010 (the "License"); you may not use this file except in compliance with
0011 the License. You may obtain a copy of the License at
0012
0013 http://www.apache.org/licenses/LICENSE-2.0
0014
0015 Unless required by applicable law or agreed to in writing, software
0016 distributed under the License is distributed on an "AS IS" BASIS,
0017 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
0018 See the License for the specific language governing permissions and
0019 limitations under the License.
0020 ---
0021
0022 ### Description
0023
0024 `UNCACHE TABLE` removes the entries and associated data from the in-memory and/or on-disk cache for a given table or view. The
0025 underlying entries should already have been brought to cache by previous `CACHE TABLE` operation. `UNCACHE TABLE` on a non-existent table throws an exception if `IF EXISTS` is not specified.
0026
0027 ### Syntax
0028
0029 ```sql
0030 UNCACHE TABLE [ IF EXISTS ] table_identifier
0031 ```
0032
0033 ### Parameters
0034
0035 * **table_identifier**
0036
0037 Specifies the table or view name to be uncached. The table or view name may be optionally qualified with a database name.
0038
0039 **Syntax:** `[ database_name. ] table_name`
0040
0041 ### Examples
0042
0043 ```sql
0044 UNCACHE TABLE t1;
0045 ```
0046
0047 ### Related Statements
0048
0049 * [CACHE TABLE](sql-ref-syntax-aux-cache-cache-table.html)
0050 * [CLEAR CACHE](sql-ref-syntax-aux-cache-clear-cache.html)
0051 * [REFRESH TABLE](sql-ref-syntax-aux-refresh-table.html)
0052 * [REFRESH](sql-ref-syntax-aux-cache-refresh.html)
