# `Tempo.SQL.PostgresTypes`
[🔗](https://github.com/elixir-tempo/tempo_sql/blob/v0.4.0/deps/postgrex/lib/postgrex/type_module.ex#L1045)

The Postgrex types for a repository that stores the composite
`tempo_range` and `tempo_multirange` columns.

A composite keeps its expression in a `jsonb` field, and Postgrex
encodes `jsonb` with the JSON library its types name, Jason unless
told otherwise. These types name `Tempo.SQL.JSON`, which uses
Erlang's built-in `:json`, so no JSON dependency is needed. Name them
in the repository's configuration:

    config :my_app, MyApp.Repo, types: Tempo.SQL.PostgresTypes

An application that needs other Postgrex extensions defines its own
types with the same JSON library:

    Postgrex.Types.define(MyApp.PostgresTypes, [MyApp.SomeExtension], json: Tempo.SQL.JSON)

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*Consult [api-reference.md](api-reference.md) for complete listing*