Tempo.SQL (Tempo SQL v0.3.0)

Top-level namespace for ex_tempo_sql — Ecto types, query macros and migration helpers that store Tempo expressions as PostgreSQL ranges and multiranges.

See the README for the installation walkthrough and the storage contract that spells out which Tempo values round-trip cleanly.

The entry-point modules are:

• Tempo.Ecto.Interval — stores an expression of one span (a value, or an interval) as tstzrange.

• Tempo.Ecto.IntervalSet — stores an expression with a last span (a set, a bounded recurrence, a value that names several) as tstzmultirange, one range a span.

• Tempo.Ecto.Tempo — Tempo.Ecto.Interval under the name it had for a bare value, kept so that schemas naming it go on working.

• Tempo.Ecto.TempoRange and Tempo.Ecto.TempoMultirange — store any expression losslessly, as the span it covers (or the spans) beside its ISO 8601 text.

• Tempo.SQL.Migration — add_interval/2, add_interval_set/2, the composite columns and their types, for Ecto migrations.

• Tempo.SQL.PostgresTypes — the Postgrex types a repository with composite columns names, encoding jsonb with Erlang's :json.

• Tempo.Ecto.QueryAPI and Tempo.Ecto.QueryAPI.Composite — Allen-named query fragments (contains/2, overlaps/2, meets/2, strictly_before/2, strictly_after/2) backed by Postgres range operators.