Amazon Redshift 使用基于成本的查询计划器和优化器,通过分析数据表的统计信息来对SQL语句的查询计划做出最佳判断。ETL 完成后的常规统计信息收集确保了用户查询的快速运行,并且每天的 ETL 进程都是高效的。Amazon Redshift 实用程序table_info脚本提供了对统计数据更新日期的分析。将统计信息(pct_stats_...
RedShift和AWS s3结合的非常好,可以利用mydumper将MySQL数据导出后,处理成一定规则的数据文件,传输到s3,然后通过Copy命令直接拷贝到RedShift。拷贝的命令如下:copy student_score from 's3://xxxx/student_score/'access_key_id '' secret_access_key '' ACCEPTINVCHARS AS ' ' TRUNCATECOLUMNS IGNOREBLANKLINES ...
Now thedbadmindatabase user accesses the Amazon Redshift database to perform analyze and vacuum of theregiontable in themarketingschema. analyzemarketing.region; vacuum marketing.region; As part of developing the ETL process, thesalesengineeruser needs to trun...
TRUNCATE會刪除目的地資料表中的所有資料,再寫入新資料。 APPEND會將所有記錄新增至 Redshift 資料表結尾。APPEND不需要主索引鍵、分發索引鍵或排序索引鍵,因此可能會附加可能重複的項目。 列舉 物件呼叫欄位描述槽類型 schedule 在排程間隔的執行期間會呼叫此物件。
We transform and load the data into our data warehouse using the Amazon Redshift Data API. Because this is asynchronous, we need to check the status of the runs before moving down the pipeline. After we move the data load from landing to staging, we truncate the lan...
The RedshiftDistribution Styleto be used when creating a table. Can be one ofEVEN,KEYorALL(see Redshift docs). When usingKEY, you must also set a distribution key with the distkey option. distkey No, unless usingDISTSTYLEKEY None
Choose true to truncate data. The default is false. Type: Boolean Required: No Username An Amazon Redshift user name for a registered user. Type: String Required: No WriteBufferSize The size (in KB) of the in-memory file write buffer used when generating .csv files on the local disk...
For optimized performance of the streaming materialized view and to reduce storage usage, occasionally purge data from the materialized view using delete, truncate, or alter table append. If you need to ingest multiple MSK topics in parallel into Amazon...
based upon whether you run in VPC or not. YOu can also use the table of links below. This stack will include everything needed to set up the autoloader with two exceptions. The KMS key must be created and managed separately, and a RedShift cluster will be required when setting up the ...
我在Glue中发现了一种更简单的JDBC连接处理方法。Glue团队推荐的截断表的方法是在向Redshift集群写入数据...