![]() SQL stored procedure names follow identifier naming conventions. If the name is qualified and a FOR clause is provided: the qualified class name specified in the FOR clause overrides the schema name specified in the function, method, procedure, or query name. If necessary, the specified package name is converted to a valid package name. If the name is qualified and no FOR clause is provided: the name of the schema is converted to a package name, followed by a dot, followed by the string ‘func’, ‘meth’, ‘proc’, or ‘query’, followed by the SQL name stripped of punctuation characters. This procedure class contains the method StoreName(). For example, the unqualified procedure name Store_Name results in a class name such as the following: User.procStoreName. If the name is unqualified and no FOR clause is provided: the system-wide default schema name is used as the package name, followed by a dot, followed by a generated class name consisting of the string ‘func’, ‘meth’, ‘proc’, or ‘query’, followed by the SQL name stripped of punctuation characters. If the class does not exist, the system creates it. When you use DDL to create a stored procedure, the name you specify is transformed into a class name. You can include Embedded SQL within an ObjectScript code block. The block of executable code specified within these commands can be written either in InterSystems SQL or ObjectScript. A method can return a single value, or one or more result sets.ĬREATE FUNCTION can create a function procedure that can optionally be projected as a stored procedure. A method can return a single value, or one or more result sets.ĬREATE METHOD can create a method that can optionally be projected as a stored procedure. InterSystems SQL supports the following commands to create a method or function:ĬREATE PROCEDURE can create a method that is always projected as a stored procedure. A query can return a single result set.ĬREATE QUERY creates a query that can optionally be projected as a stored procedure. InterSystems SQL supports the following commands to create a query:ĬREATE PROCEDURE can create a query that is always projected as a stored procedure. These are described in the following sections. Defining Stored ProceduresĪs with most aspects of InterSystems SQL, there are two ways of defining stored procedures: using DDL and using classes. This method also returns the procedure type: “function” or “query”. You can determine if a procedure already exists using the $() Opens in a new tab method. You can define a stored procedure as a method that can modify the database data and return either a single value or one or more result sets. You can define a stored procedure as a function procedure that can serve as a user-defined function, returning a single value. You can defined a stored procedure as a query that returns a single result set of data by querying the database. Within a stored procedure, you can use the full range of InterSystems IRIS object-based features. In fact, a stored procedure is nothing more than a class method that is made available to SQL. Unlike relational databases, InterSystems IRIS enables you to define stored procedures as methods of classes. A Stored Procedure (SP) provides a callable routine that is stored in the database and can be invoked within an SQL context (for example, by using the CALL statement or via ODBC or JDBC). Like most relational database systems, InterSystems IRIS allows you to create SQL stored procedures. A function can also be invoked by a CALL statement. ![]() ![]() A stored procedure can be a user-defined function, returning a single value. Stored procedures accept some number of input, input-output, and output arguments. Functions accept some number of input directed arguments and return a single result value. Stored procedures can only be invoked by a CALL statement. Functions are invoked from any SQL statement that supports functionname() syntax. There are two types of SQL routines: functions and stored procedures. OverviewĪn SQL routine is an executable unit of code that can be invoked by the SQL query processor. This chapter describes how to define and use stored procedures in InterSystems SQL on InterSystems IRIS® data platform. ![]()
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