本主题描述如何在 Amazon Redshift 中创建和使用存储过程。存储过程是多个程序可以使用的 SQL 语句的集合。 您可以定义 Amazon Redshift 存储过程,使用 PostgreSQL 程序性语言 PL/pgSQL 来执行一组 SQL 查询和逻辑运算。过程存储在数据库中,可供任何具有足够数据库权限的用户运行。
近日，亚马逊云科技推出Amazon Redshift流式注入（Streaming Ingestion）功能预览，让客户能够直接从Amazon K...
SVL_STORED_PROC_MESSAGES – messages in stored procedures emitted by the RAISE query are logged with the corresponding logging level. For more information, see SVL_STORED_PROC_MESSAGES. SVL_QLOG – the query ID of the procedure call is logged for each query called from a stored procedure. Fo...
Amazon Redshift support stored procedures since May 2019 which enbled data warehouse SQL developers to build batches of SQL codes and call repeatitively using PL/pgSQL (Procedural Language/PostgreSQL). Although Amazon Redshift enables creation of stored procedures using PL/pgSQL if you create your...
Amazon Redshift 现在支持 SQL 存储过程,以便更轻松地迁移到 Amazon Redshift。存储过程用于针对数据转换、数据验证和特定于业务的逻辑来封装逻辑。通过将多个 SQL 步骤组合到一个存储过程中,可以减少应用程序与数据库之间的往返次数。 到目前为止,在传统数据仓库中使用存储过程的客户必须考虑通过 Amazon EMR 等服务重新...
而不适用于普通的 OLTP 系统，最SQL 语句支持方面不如 PostgreSQL 丰富，如它不支持 Stored Procedures,...
Stored procedures provide new control structures such asFORandWHILEloops. These are useful for iterating over a small number of items, such as a list of tables. However, you should avoid using the loop structures to replace a set-based SQL operation. For example, iterating over millions of ...
First, I had used Redshift previously on a considerable scale and felt confident about ETL procedures and some of the common tuning best practices. Second, it is part of AWS, and that alone makes Redshift’s case strong for being a common component in a customer’s stack. Problem #1: Co...
Amazon lists many PostgreSQL features and functions that are not supported in Redshift. In addition to the aforementioned lack of support for constraints and indexes, the list of unsupported features includes stored procedures, triggers, value expressions, and inheritance...
Logging stored procedures Limitations PL/pgSQL language reference PL/pgSQL reference conventions Structure of PL/pgSQL Supported PL/pgSQL statements Materialized views Materialized view queries Automatic query rewriting to use materialized views Materialized views on external data lake tables Refreshing a ma...