Extracted AST structure query.

It uses a basic syntax like

[action] [quantifier?] [schema] where [predicates]

The action is any alphanumeric value. It can be used to specify what do you aim to use the query for. It could ̀ecto for instance that you query Ecto with, or even ets that lookup an ets table with match spec.

The quantifier is used to limit the queries result but can be ommited defaulting to 1. It supports the following:

• Positive integer; 1, 2, 10 etc...
• Range: 10..20, it limits the query to 10 records offsetting to the 10th record
• all: Returns all the record matching

The schema needs to be an idenfifier (non-quoted alphanumeric) that matches the definition's schemas/1 function.

The predicates are combination of boolean operators and operand for validation. See the module's type for every support operators but it can basically be a syntax like

# could match `get` and run query on Ecto.
get 5 User where (name = "John Doe") or (age > 18)

# count match `protobuf` to query Ecto and generate Protobufs.
protobuf all BoardGame where name like "Catan"