![]() ![]() The output shows that the stated function retrieves the product/multiplication of given numbers. Let’s call the “product” function using the positional notation: SELECT product(45, 5) Let’s first create a function named “product” that accepts two numbers and retrieves their multiplication: CREATE FUNCTION product(num_1 INT, num_2 INT) Here is the syntax to call a user-defined function using the positional notation: SELECT func_name(parameter_list) ![]() To call a user-defined function using positional notation, all you need to do is specify the argument in the same order as the parameter’s order while calling a function. How to Call a User-defined Function Using Positional Notation? To call a user-defined function in Postgres, use one of the following methods: Depending on how it is implemented, a user-defined function may retrieve a value or perform some specific actions. How to Call a User-defined Function in Postgres?Ĭalling/invoking a user-defined function requires the function name and its parameters(if any). In this write-up, we will illustrate different methods to invoke a user-defined function in Postgres. To utilize the functionality of a user-defined function in PostgreSQL, we need to invoke/call it. Using Postgres functions, we can create custom logic and reutilize it in our database when needed. In PostgreSQL, user-defined functions allow us to execute a group of statements to get the desired results.
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