e7707c8180
* Remove `ALL` key word to make grammar more clear. Co-authored-by: qzsee <shizhiqiang03@meituan.com>
79 lines
2.6 KiB
Markdown
79 lines
2.6 KiB
Markdown
---
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{
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"title": "CREATE TABLE LIKE",
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"language": "zh-CN"
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}
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---
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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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# CREATE TABLE LIKE
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## description
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该语句用于创建一个表结构和另一张表完全相同的空表，同时也能够可选复制一些rollup。
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语法：
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```
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CREATE [EXTERNAL] TABLE [IF NOT EXISTS] [database.]table_name LIKE [database.]table_name [WITH ROLLUP (r1,r2,r3,...)]
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```
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说明:
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1. 复制的表结构包括Column Definition、Partitions、Table Properties等
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2. 用户需要对复制的原表有`SELECT`权限
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3. 支持复制MySQL等外表
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4. 支持复制OLAP Table的rollup
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## Example
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1. 在test1库下创建一张表结构和table1相同的空表，表名为table2
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CREATE TABLE test1.table2 LIKE test1.table1
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2. 在test2库下创建一张表结构和test1.table1相同的空表，表名为table2
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CREATE TABLE test2.table2 LIKE test1.table1
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3. 在test1库下创建一张表结构和table1相同的空表，表名为table2，同时复制table1的r1，r2两个rollup
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CREATE TABLE test1.table2 LIKE test1.table1 WITH ROLLUP (r1,r2)
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4. 在test1库下创建一张表结构和table1相同的空表，表名为table2，同时复制table1的所有rollup
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CREATE TABLE test1.table2 LIKE test1.table1 WITH ROLLUP
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5. 在test2库下创建一张表结构和test1.table1相同的空表，表名为table2，同时复制table1的r1，r2两个rollup
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CREATE TABLE test2.table2 LIKE test1.table1 WITH ROLLUP (r1,r2)
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6. 在test2库下创建一张表结构和test1.table1相同的空表，表名为table2，同时复制table1的所有rollup
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CREATE TABLE test2.table2 LIKE test1.table1 WITH ROLLUP
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7. 在test1库下创建一张表结构和MySQL外表table1相同的空表，表名为table2
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CREATE TABLE test1.table2 LIKE test1.table1
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## keyword
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```
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CREATE,TABLE,LIKE
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```
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