Map, set, and list types (Go)

Use the map type to store a typed set of key-value pairs represented as a JSON object.

When you define a map column, you specify the data type for the keys and values. For an example defining a map column, see Create a table (Go).

When written to a table, maps are internally ordered by their keys, and they are returned in that order.

The following limitations apply:

The Go client accepts maps, datatypes.SortedMap[K, V], or datatypes.LinkedMap[K, V]. It returns map[string][any] by default.

Use the set type to store a typed collection of unique values represented as a JSON array.

When you define a set column, you specify the data type for the values. For an example defining a set column, see Create a table (Go).

When written to a table, sets are ordered by their values.

The following limitations apply:

The Go client accepts slices or datatypes.Set[T]. It returns []any by default.

Use the list type to store a typed collection of ordered, non-unique values represented as a JSON array.

When you define a list column, you specify the data type for the values.

When written to a table, lists elements are ordered by their position in the list.

The following limitations apply:

The Go client accepts slices. It returns []any by default.