[bug] Syntax keyword collision with input key name

[elwin]

Hi there!

It seems that accessing input data with a key of type collides with the type keyword used for a type declaration:

for $i in ({"id": 1, "type": 1}, {"id": 2, "type": 2})
return $i.type

results in the following error

line 2:10 no viable alternative at input 'type'

which seems to happen at the parsing stage. Replacing return $i.type with return $i.id results in a correct execution.

Unfortunately, I don't have any experience with ANTLR (or parsing data in general), so I'm afraid I can't contribute much to this issue.

[ghislainfourny]

Ongoing fix in #1146