![]() ![]() Netezza supports overloading of functions and procedures therefore, argument types are necessary.Īs opposite to procedures, functions in Netezza only refer to an external implementation. The next statements are used to remove procedures, normal functions and aggregate functions in Netezza:ĭROP PROCEDURE procedure_name(argument_types)ĭROP FUNCTION normal_function_name(argument_types)ĭROP AGGREGATE aggregate_function_name(argument_types) MS SQL doesn’t support overloading of procedures and functions so, while removing them only the name is specified.Īs opposite to procedures and normal functions, aggregate functions in MS SQL only refer to an outside implementation. The next statements are used to remove procedures, normal functions and aggregate functions in MS SQL: SQLite doesn’t support creating procedures and functions, so there is no statement to remove them. Aggregate functions are removed as normal ones by using the DROP FUNCTION statement. Since 10.3.3 version (23rd December 2017) it is possible to create aggregate functions in MariaDB. MySQL and MariaDB don’t support overloading of procedures or functions therefore, only a name is specified. The next statement is used to remove procedures in MySQL and MariaDB: Standalone functions and procedures cannot be overloaded, so there is no need to specify argument types while removing. To remove functions and procedures from the package is possible only via removing or redefining the package. The statement similar to previous is used to remove functions:įunctions and procedures can be standalone or can be created in a collection using a package. The next statement is used to remove procedures in Oracle: DROP AGGREGATE and DROP FUNCTION statements are used to remove functions in earlier versions. ![]() The syntax of these statements is the same as DROP ROUTINE’s.ĭROP ROUTINE and DROP PROCEDURE statements and procedures came up in the version 11. ![]() There are separate statements to remove aggregate functions, normal functions and procedures respectively: If the function or procedure is not overloaded, then it is not necessary to specify argument types while it is removed: To eliminate ambiguity while removing procedures or functions, the arguments need to be specified. Creating a function with the same name is called a function overloading. There might be functions and procedures with the same name but with different arguments. ![]() argument_types – argument types separated by a comma.ĭROP ROUTINE my_function(INTEGER, INTEGER).The query syntax:ĭROP ROUTINE function_or_procedure_name(argument_types) Using a DROP ROUTINE statement, it is possible to remove any function or procedure. Functions, including aggregate functions, are available in early versions. Procedures can be created since version 11 released at the end of 2018. It is possible to create 2 types of functions in PostgreSQL: normal and aggregate. Only relational DBMS are considered in the article. When considering enough amount of DBMS, it turns out that there is no universal method to remove a function or a procedure. You must consider many nuances during developing tools that interact with various DBMS, because the same things could be implemented in different ways and a SQL standard could be supported in different ways, too. ![]()
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