How to access dataset in current scope generated by a call to a stored procedure in TSQL?

Question

Problem Background

Generating and accessing data of a fixed column layout is easy. You can create local temp tables up-front, and populate them by calling stored proc

Answer 1

Create the temp table before the sp_executesql: it will still be in scope for "inner" scopes like the sp_executesql

Change the SQL to do an INSERT rather than SELECT..INTO...

Edit:

Make the table wide enough to cover all options.

Frankly, SQL is designed to work with fixed table definitions: variable output signatures (tables) leads to the problem you have...