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exosql
0.2.2
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0.2.1
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0.1.0
Universal SQL engine for Elixir. This library implements the SQL logic to perform queries on user provided databases using a simple interface based on Foreign Data Wrappers from PostgreSQL.
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lib/node.ex
defmodule ExoSQL.Node do
@moduledoc """
Example extractor that gather information from the system
Currently only supports the `passwd` table.
"""
def schema(_db), do: {:ok, ["passwd"]}
def schema(_db, "passwd") do
{:ok, %{ columns: [
"user", "x", "uid", "gid", "name", "home", "shell"
]}}
end
def execute(_db, "passwd", _quals, _columns) do
csv_data = File.stream!("/etc/passwd") |> CSV.decode(separator: ?:)
rows = for l <- csv_data do
{:ok, l} = l
l
end
{:ok, %{ columns: [
"user", "x", "uid", "gid", "name", "home", "shell"
], rows: rows}}
end
end