a75dc80a76
### What changes were proposed in this pull request? Remove the unneeded embedded inline HTML markup by using the basic markdown syntax. Please see #28414 ### Why are the changes needed? Make the doc cleaner and easily editable by MD editors. ### Does this PR introduce _any_ user-facing change? No ### How was this patch tested? Manually build and check Closes #28451 from huaxingao/html_cleanup. Authored-by: Huaxin Gao <huaxing@us.ibm.com> Signed-off-by: Sean Owen <srowen@gmail.com>
57 lines
1.7 KiB
Markdown
57 lines
1.7 KiB
Markdown
---
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layout: global
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title: REFRESH
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displayTitle: REFRESH
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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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### Description
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`REFRESH` is used to invalidate and refresh all the cached data (and the associated metadata) for
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all Datasets that contains the given data source path. Path matching is by prefix, i.e. "/" would
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invalidate everything that is cached.
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### Syntax
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```sql
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REFRESH resource_path
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```
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### Parameters
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* **resource_path**
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The path of the resource that is to be refreshed.
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### Examples
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```sql
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-- The Path is resolved using the datasource's File Index.
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CREATE TABLE test(ID INT) using parquet;
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INSERT INTO test SELECT 1000;
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CACHE TABLE test;
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INSERT INTO test SELECT 100;
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REFRESH "hdfs://path/to/table";
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```
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### Related Statements
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* [CACHE TABLE](sql-ref-syntax-aux-cache-cache-table.html)
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* [CLEAR CACHE](sql-ref-syntax-aux-cache-clear-cache.html)
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* [UNCACHE TABLE](sql-ref-syntax-aux-cache-uncache-table.html)
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* [REFRESH TABLE](sql-ref-syntax-aux-refresh-table.html)
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