Qry := qry || ' union select employee_number from temp_tab' || a Įxecute 'create table result_rec as '|| qry įollowing is the result.
#CREATE VIEW REDSHIFT SOFTWARE#
APIs enable programs and applications to communicate with platforms and services, and can be designed to use REST (REpresentational State Transfer) as a software architecture style. Qry := qry || 'select employee_number from temp_tab' || a API (Application Programming Interface) is a design pattern used to expose a platform or application to another party. WHERE direct.employee_number = indirect.manager_employee_number' WHERE direct.employee_number = indirect.manager_employee_number) a' Įxecute 'create temp table '||quote_ident(tblnm1)||' as select indirect.employee_number Note that if you create views with dependencies on a table where this occurs. create or replace procedure Rec_test2( result_set INOUT REFCURSOR)Ĭreate temp table temp_tab0 as (SELECT employee_number from employee_rec_test where manager_employee_number=801) Įxecute 'select * from( select indirect.employee_numberįROM '||quote_ident(tblnm)||' direct, employee_rec_test indirect These scenarios apply when Stitch creates a new table in Redshift. EMPLOYEE_NUMBERįollowing is the example of Redshift recursive CTE using stored procedure. We need to identify the employee and manager hierarchy. Amazon Redshift allows you to analyze structured and semi-structured data and seamlessly query data lakes and operational databases, using AWS designed hardware and automated machine learning (ML)-based tuning to deliver top-tier price-performance at scale. To implement the Redshift recursive CTE, we have already created emp table. Redshift Recursive Query Alternative using Stored Procedure In the other RDBMS such as Teradata or Snowflake you can specify a recursive query by preceding a query with the WITH RECURSIVE clause or create a CREATE VIEW statement.Īmazon Redshift does not support recursive CTEs, you have to use Redshift union all set operators or inner join approach if you know the depth of the recursive query hierarchy.īut, if you don’t know the depth of the recursive query hierarchy, you have to use Redshift stored procedure to identify the depth dynamically. Select id, name, manager_id from org_cte order by manager_id Redshift Recursive CTE Alternative create view in redshift particular schema. Select e.id, e.name, e.manager_id, level + 1 ( select id, name, manager_id, 1 as level with recursive org_cte(id, name, manager_id, level) as common_table_expression ] SELECT statement įor example, you can use the following recursive query for hierarchical data. Amazon Redshift, a fully-managed cloud data warehouse, now adds support for Recursive Common Table Expression (CTE) to analyze hierarchical data, such as organizational charts where employees reports to other employees (managers), or multi-level product orders where a product consists of many components, which in turn consist of other components.įollowing is the syntax of recursive CTE in Redshift. To drop a Redshift view, use the DROP VIEW command: DROP VIEW viewname You can also add the IF EXISTS option to prevent errors when trying to drop a non-existent view.
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