February 2018
Intermediate to advanced
510 pages
16h 10m
English
Content preview from MySQL 8 Administrator???s Guide
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Features of a user-defined function interface
A user-defined function interface provides independent capabilities to a user purpose function.
The following features and capabilities are provided by the MySQL interface for user-defined functions:
- Functions can accept arguments of integer, string, or real values and can return values for the same types
- Simple functions can be defined to operate on a single row at a time or it can be aggregate functions to operate on groups of rows
- Functions are given information to enable them so that they can check the types, names, and numbers of arguments passed
- Before passing arguments to the given function, you can also ask MySQL to coerce arguments
- Indications can be made if the function results in any ...
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