76 lines
3.1 KiB
Markdown
76 lines
3.1 KiB
Markdown
---
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{
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"title": "SHOW LOAD",
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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 LOAD
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## description
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该语句用于展示指定的导入任务的执行情况
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语法：
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SHOW LOAD
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[FROM db_name]
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[
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WHERE
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[LABEL [ = "your_label" | LIKE "label_matcher"]]
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[STATE = ["PENDING"|"ETL"|"LOADING"|"FINISHED"|"CANCELLED"|]]
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]
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[ORDER BY ...]
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[LIMIT limit][OFFSET offset];
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说明：
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1) 如果不指定 db_name，使用当前默认db
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2) 如果使用 LABEL LIKE，则会匹配导入任务的 label 包含 label_matcher 的导入任务
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3) 如果使用 LABEL = ，则精确匹配指定的 label
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4) 如果指定了 STATE，则匹配 LOAD 状态
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5) 可以使用 ORDER BY 对任意列组合进行排序
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6) 如果指定了 LIMIT，则显示 limit 条匹配记录。否则全部显示
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7) 如果指定了 OFFSET，则从偏移量offset开始显示查询结果。默认情况下偏移量为0。
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8) 如果是使用 broker/mini load，则 URL 列中的连接可以使用以下命令查看：
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SHOW LOAD WARNINGS ON 'url'
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## example
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1. 展示默认 db 的所有导入任务
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SHOW LOAD;
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2. 展示指定 db 的导入任务，label 中包含字符串 "2014_01_02"，展示最老的10个
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SHOW LOAD FROM example_db WHERE LABEL LIKE "2014_01_02" LIMIT 10;
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3. 展示指定 db 的导入任务，指定 label 为 "load_example_db_20140102" 并按 LoadStartTime 降序排序
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SHOW LOAD FROM example_db WHERE LABEL = "load_example_db_20140102" ORDER BY LoadStartTime DESC;
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4. 展示指定 db 的导入任务，指定 label 为 "load_example_db_20140102" ，state 为 "loading", 并按 LoadStartTime 降序排序
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SHOW LOAD FROM example_db WHERE LABEL = "load_example_db_20140102" AND STATE = "loading" ORDER BY LoadStartTime DESC;
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5. 展示指定 db 的导入任务 并按 LoadStartTime 降序排序,并从偏移量5开始显示10条查询结果
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SHOW LOAD FROM example_db ORDER BY LoadStartTime DESC limit 5,10;
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SHOW LOAD FROM example_db ORDER BY LoadStartTime DESC limit 10 offset 5;
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6. 小批量导入是查看导入状态的命令
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curl --location-trusted -u {user}:{passwd} http://{hostname}:{port}/api/{database}/_load_info?label={labelname}
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## keyword
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SHOW,LOAD
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