bug: Parser does not handle new version 14 function definition syntax

[davecramer]

The npgsql folks ran into this npgsql/npgsql#4445
Apparently multi-line functions can be defined without using $$ and semicolons are legal
This provides a failing test for same
There is some discussion about providing a connection parameter to pass the provided SQL as is without rewriting it in #1946. This may solve the problem somewhat

[vlsi]

It looks like we need to parse procedure body as well (we could treat begin-end pairs as quote start and quote end)

[roji]

I'll keep an eye on this to see what you guys come up with - we may do the same in Npgsql.

Note that on our side there's also a "no-parse" option, where Npgsql just sends the SQL as-is. I'm hoping that long-term people would be able to shift to that, though realistically the SQL parsing/rewriting is likely here to stay.

[roji]

In case you guys are interested, here's a post I wrote about the no-parse mode.