Implement VALUES

[dain]

No description provided.

[damiencarol]

👍

[dain]

We should be able to prune the columns for queries like:

SELECT count(*) FROM (VALUES (1.1, 2), (sin(3.3), 2+2)) x (a, b);
SELECT a FROM (VALUES (1.1, 2), (sin(3.3), 2+2)) x (a, b)

But I don't know where we would put that code. Also it would require special handling for no-columns.

[damiencarol]

I don't know this syntax and we (at my company) only need simple implementation of VALUES.

SQL-92 say that :

VALUES
It is a Function
Specify a set of s to be constructed into a table.

Does this PR implements the "simple" way ?

[martint]

We should be able to prune the columns for queries like [...]
But I don't know where we would put that code. Also it would require special handling for no-columns.

You need to add a rule in PruneUnreferencedOutputs for ValuesNode. It needs to look at the list of expected outputs that gets passed in and drop anything the node produces that is not in that list.

[martint]

Other than those comments, looks good