# `Electric.Replication.Eval.Env.BasicTypes`
[🔗](https://github.com/electric-sql/electric/tree/%40core/sync-service%401.6.2/packages/sync-service/lib/electric/replication/eval/env/basic_types.ex#L1)

This module describes basic types, their categories, and if they are preferred within said category.
Information here is gathered from a system catalog `pg_type`, as described in
[PG docs](https://www.postgresql.org/docs/current/catalog-pg-type.html).

## Known types

| type                    | category | preferred? |
| ----------------------- | -------- | ---------- |
| bool                    | boolean  | t          |
| int2                    | numeric  |            |
| int4                    | numeric  |            |
| int8                    | numeric  |            |
| float4                  | numeric  |            |
| float8                  | numeric  | t          |
| numeric                 | numeric  |            |
| name                    | string   |            |
| text                    | string   | t          |
| varchar                 | string   |            |
| date                    | datetime |            |
| time                    | datetime |            |
| timestamp               | datetime |            |
| timestamptz             | datetime | t          |
| interval                | timespan | t          |
| unknown                 | unknown  |            |
| bytea                   | user     |            |
| uuid                    | user     |            |
| anyarray                | pseudo   |            |
| anycompatible           | pseudo   |            |
| anycompatiblearray      | pseudo   |            |
| anycompatiblemultirange | pseudo   |            |
| anycompatiblenonarray   | pseudo   |            |
| anycompatiblerange      | pseudo   |            |
| anyelement              | pseudo   |            |
| anyenum                 | pseudo   |            |
| anymultirange           | pseudo   |            |
| anynonarray             | pseudo   |            |
| anyrange                | pseudo   |            |

# `known`

List all known basic types

## Examples

    iex> noop(known()[:timestamptz])
    %{category: :datetime, preferred?: true}

# `noop`

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