Creates a view in a database. The view isn't physically materialized; the query that defines the view is run every time the view is referenced in a query.
To create a Redshift view, use theCREATE VIEWcommand: CREATEORREPLACEVIEWview_nameAS; While optional, theOR REPLACEpart is frequently used so the the view is updated if already exists. Some examples: -- A view to show only beta usersCREATEVIEWbeta_users_vwASSELECT*FROMusersWHEREbeta=1;-- ...
redshift create materialized view 字段注释 在Amazon Redshift中，创建物化视图（Materialized View）时并不直接支持字段级别的注释。但是，你可以在创建物化视图后，通过COMMENT ON COLUMN 命令为物化视图中的列添加注释。以下是一个示例：sql CREATE MATERIALIZED VIEW my_materialized_view AS SELECT column1, column2...
Creates a materialized view.
The BACKUP clause is available in Redshift to control if the view is to be included in snapshots. zaza changed the title CREATE MATERIALIZED VIEW with BACKUP NO is not supported [BUG] JSQLParser 4.6 : Redshift : CREATE MATERIALIZED VIEW with BACKUP NO is not supported Feb 24, 2023 ...
This tutorial guides you through the process of creating a logical data model (LDM) in your workspace using tables and views in your data warehouse (for example, Snowflake or Redshift). A newly created workspace does not have an LDM therefore you are going...
物化视图最重要的作用就是对查询语句进行查询改写,如果期望查询语句能利用物化视图进行查询改写,则需要在查询语句前添加set odps.sql.materialized.view.enable.auto.rewriting=true;配置。当物化视图处于失效状态时无法用于查询改写,查询语句会直接查询源表而无法获得加速作用。 说明 默认每个MaxCompute项目只能利用自身的物化...
NVIDIA RTX in Desktop Workstations NVIDIA RTX in Professional Laptops NVIDIA RTX-Powered AI Workstations Cloud and Data Center Overview Grace CPU DGX Platform EGX Platform IGX Platform HGX Platform NVIDIA MGX NVIDIA OVX Networking Overview DPUs and SuperNICs Ethernet InfiniBand GPUs...
To perform query rewrite operations on a query statement based on a materialized view, you must add set odps.sql.materialized.view.enable.auto.rewriting=true; before the query statement. If a materialized view is invalid, the materialized view cannot be used for query rewrite operations. In ...
MaxCompute默认不支持使用非确定性函数(例如UDF、UDAF等)创建物化视图。当您的业务场景必须要使用非确定性函数时,请在Session级别设置属性set odps.sql.materialized.view.support.nondeterministic.function=true;。 命令格式 set odps.sql.materialized.view.initial.partition={"分区列": "分区值"}; --可选项,指定初...