Derive Macro Row

#[derive(Row)]
{
    // Attributes available to this derive:
    #[clickhouse_arrow]
}

Derive macro for the Row trait.

This is similar in usage and implementation to the serde::Serialize and serde::Deserialize derive macros.

serde attributes

The following serde attributes are supported, using #[clickhouse_arrow(...)] instead of #[serde(...)]:

• with
• from and into
• try_from
• skip
• default
• deny_unknown_fields
• rename
• rename_all
• serialize_with, deserialize_with
• skip_deserializing, skip_serializing
• flatten
  • Index-based matching is disabled (the column names must match exactly).
  • Due to the current interface of the Row trait, performance might not be optimal, as a value map must be reconstitued for each flattened subfield.

ClickHouse-specific attributes

• The nested attribute allows handling ClickHouse nested data structures. See an example in the tests folder.

Known issues

• For serialization, the ordering of fields in the struct declaration must match the order in the INSERT statement, respectively in the table declaration. See issue #34.