概述 在PostgreSQL中,除了标准 SQL 语句之外还支持使用各种过程语言(例如 PL/pgSQL、C、PL/Tcl、PL/Python、PL/Perl、PL/Java 等 )创建复杂的过程和函数,称为存储过程(Stored Procedure)和自定义函数(User-Defined Function)。存储过程支持许多过程元素,例如控制结构、
维基百科是这样定义的:A stored procedure (also termed proc, storp, sproc, StoPro, StoredProc, StoreProc, sp, or SP) is a subroutine available to applications that access a relational database management system (RDMS). Such procedures are stored in the database data dictionary。 PostgreSQL对存储...
我们还设计了以下模块关系的类图,展示了存储过程如何与其他模块交互: BusinessService+callStoredProcedure()DataAccess+executeStoredProcedure() 性能攻坚 为了确保系统的响应速度,我们在存储过程的设计上进行了多次调优。使用 JMeter 进行了性能测试,并根据结果反复修改存储过程的实现逻辑以达到最佳效果。我们主要针对查询的...
/** * Call a stored procedure that returns a result set * @return array */ function getAccounts() { $stmt = $this->pdo->query('SELECT * FROM get_accounts()'); $accounts = []; while ($row = $stmt->fetch()) { $accounts[] = [ 'id' => $row['id'], 'first_name' => ...
<Select CommandName="AddGuanZhuDu"Method=""CommandType="StoredProcedure"Description="增加关注度"ResultClass="ValueType"><![CDATA[UpdateFundAttention #jjdm:String#]]></Select>修改成下面的方式:<Select CommandName="AddGuanZhuDu"Method=""CommandType="Text"Description="增加关注度"ResultClass="ValueType">...
PostgreSQLJavaAppPostgreSQLJavaAppCall ProcedureReturn ResultCommit Transaction 我们可以通过以下Python代码块来构造存储过程的请求。 importpsycopg2defcall_stored_procedure(proc_name,*args):conn=psycopg2.connect("dbname=test user=postgres password=secret")cur=conn.cursor()query=f"CALL{proc_name}({','.join...
PostgreSQL Grant FritcheyinPostgreSQL Functions and Procedures: Learning PostgreSQL with Grant One of the most useful constructs in SQL Server is the stored procedure. It gives you a way to do... 15 February 20249 min read PostgreSQL Boris NovikovinPostgreSQL ...
You first need to call thecreateStoredProcedureQuerymethod of theEntityManagerwith the name of the database function and its return type, to instantiate aStoredProcedureQuery. In the next step, you need to register all function parameters. You can do that by calling theregisterStoredProcedureParamet...
SQL Server supports stored procedures written in various languages alongside standard SQL syntax. SQL Server SQL Server supports stored procedures for languages supported by Microsoft .NET framework (common runtime languages or CLR, like VB, C#, or Python). PostgreSQL vs. MSSQL – Query ...
CREATE OR REPLACE PROCEDURE add_user(pv_name varchar, pd_created_at timestamp) AS $$ BEGIN insert into users(name, created_at) values (pv_name, pd_created_at); END; $$ LANGUAGE plpgsql; add_user 用于增加一个用户。然后我们通过 PHP 调用该存储过程,创建一个新的文件 stored_procedure.php:...