[Feature Request] pinned columns on mat table

[tatsujb]

Bug, feature request, or proposal:

feature request

What is the expected behavior?

to be able to at least at init set certain columns as non scrollable x-wise.
(pinned columns)

What is the current behavior?

You cannot accomplish this in conjunction with other mat table features, not even if you had to rewrite 90% of mat table's functionalities to accommodate this feature.

What are the steps to reproduce?

If you try to gain the "pinned column" functionality by splitting your pinned and unpinned into two :
https://stackblitz.com/edit/angular-1vg9gn-q1back?file=app/table-basic-example.ts

you loose the column sort and column filter functionality on one of the two.

if you instead opt for the sort and filter functionalities, you have to drop column pinning.

I don't want to "pick my poison", I want to have all three!

What is the use-case or motivation for changing an existing behavior?

pinning columns

Which versions of Angular, Material, OS, TypeScript, browsers are affected?

Angular 6
material 6
typescript 2.7.2

[andrewseguin]

Duplicate of #5890

Also, coming soon: #11483

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