68 lines
2.4 KiB
Markdown
68 lines
2.4 KiB
Markdown
---
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{
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"title": "SHOW TABLET",
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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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# SHOW TABLET
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## description
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该语句用于显示 tablet 相关的信息（仅管理员使用）
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语法：
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SHOW TABLET
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[FROM [db_name.]table_name | tablet_id] [partiton(partition_name_1, partition_name_1)]
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[where [version=1] [and backendid=10000] [and state="NORMAL|ROLLUP|CLONE|DECOMMISSION"]]
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[order by order_column]
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[limit [offset,]size]
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现在show tablet命令支持按照按照以下字段进行过滤：partition, index name, version, backendid,
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state，同时支持按照任意字段进行排序，并且提供limit限制返回条数。
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## example
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1. 显示指定 db 的下指定表所有 tablet 信息
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SHOW TABLET FROM example_db.table_name;
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// 获取partition p1和p2的tablet信息
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SHOW TABLET FROM example_db.table_name partition(p1, p2);
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// 获取10个结果
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SHOW TABLET FROM example_db.table_name limit 10;
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// 从偏移5开始获取10个结果
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SHOW TABLET FROM example_db.table_name limit 5,10;
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// 按照backendid/version/state字段进行过滤
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SHOW TABLET FROM example_db.table_name where backendid=10000 and version=1 and state="NORMAL";
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// 按照version字段进行排序
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SHOW TABLET FROM example_db.table_name where backendid=10000 order by version;
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// 获取index名字为t1_rollup的tablet相关信息
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SHOW TABLET FROM example_db.table_name where indexname="t1_rollup";
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2. 显示指定 tablet id 为 10000 的 tablet 的父层级 id 信息
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SHOW TABLET 10000;
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## keyword
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SHOW,TABLET,LIMIT
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