json function
A JSON document; its content can itself be JSON null.
name fixes the physical column name; otherwise snake_case is derived from
the Record field. defaultSql is trusted database SQL. clientDefault runs
only for omitted insert values and may coexist with a database default.
Implementation
ColumnDefinition<SqlJson> json({
String? name,
bool unique = false,
String? defaultSql,
SqlJson Function()? clientDefault,
}) => const ColumnDefinition._();