Prestige
A middleware layer for the Presto database
Documentation: hexdocs
Installation
Prestige can be installed by adding prestige
to your list of dependencies in mix.exs
:
def deps do
[
{:prestige, "~> 1.0"}
]
end
Running tests
Clone the repo and fetch its dependencies:
$ git clone https://github.com/smartcitiesdata/prestige
$ cd prestige
$ mix deps.get
$ mix test
Example Usage
Adding Data to Presto
Create table:
session = Prestige.new_session(url: "http://localhost:8080", user: "bbalser")
create_statement = "create table memory.default.monkeys ( id bigint, stuff array(row(name varchar, color varchar)))"
Prestige.query(session, create_statement)
Insert data:
session = Prestige.new_session(url: "http://localhost:8080", user: "bbalser")
insert_statement = "insert into memory.default.monkeys(id, stuff) values(1, array[row('George','black'), row('James','red')])"
Prestige.query(session, insert_statement)
or
session = Prestige.new_session(url: "http://localhost:8080", user: "bbalser")
insert_statement = "insert into memory.default.monkeys(id, stuff) values(?, array[row(?,?), row(?,?)])"
Prestige.query(session, insert_statement, [1, "George", "black", "James", "red"])
Select data:
iex> session = Prestige.new_session(url: "http://localhost:8080", user: "bbalser")
iex> Prestige.query!(session, "select * from memory.default.monkeys") |> Prestige.Result.as_maps()
[
%{
"id" => 1,
"stuff" => [
%{"color" => "black", "name" => "George"},
%{"color" => "red", "name" => "James"}
]
}
]
License
Released under Apache 2 license.