MySQL Shell 8.0
To create a new MySQL Shell global object to act as an entry
point for your extension objects, first create a new top-level
extension object using the built-in
shell.createExtensionObject() function in
JavaScript or shell.create_extension_object()
in Python:
shell.createExtensionObject()
Then register this top-level extension object as a MySQL Shell
global object by calling the
shell.registerGlobal() method in JavaScript or
shell.register_global() in Python. The syntax
for the method is as follows:
shell.registerGlobal(name, object[, definition])
Where:
name is a string giving the name (and
class) of the global object. The name must be a valid
scripting identifier, so the first character must be a letter
or underscore character, followed by any number of letters,
numbers, or underscore characters. The name must be unique in
your MySQL Shell installation, so it must not be the name of
a built-in MySQL Shell global object (for example,
db, dba,
cluster, session,
shell, util) and it must
not be a name you have already used for a user-defined
MySQL Shell global object. The examples below show how to
check whether the name already exists before registering the
global object.
The name that you use to register the global object is used
as-is when you access the object in both JavaScript and
Python modes. It is therefore good practice to use a simple
one-word name for the global object (for example,
ext). If you register the global object
with a complex name in camel case or snake case (for
example, myCustomObject), when you use
the global object, you must specify the name as it was
registered. Only the names used for members are handled in a
language-appropriate way.
object is the extension object that you are
registering as a MySQL Shell global object. You can only
register an extension object once.
definition is an optional dictionary with
help information for the global object that is provided in the
MySQL Shell help system. The dictionary contains the
following keys:
brief (string, optional): A short
description of the global object to be provided as help
information.
details (list of strings, optional): A
detailed description of the global object to be provided
as help information.