https://www.tutorialspoint.com/typescript/typescript_default_parameters.htm
TypeScript - Default Parameters
In TypeScript, we can assign the function parameters some values by default. Such parameters can be explicitly passed values. These parameters are known as...
default parameterstypescript
https://jira.mariadb.org/browse/MDEV-37054
[MDEV-37054] implement INFORMATION_SCHEMA.PARAMETERS.PARAMETER_DEFAULT column - Jira
information schemaimplementparametersdefaultcolumn