Untyped array boundaries (AbstractConnection::$connectionParameters, ColumnInterface::getOptions()) cause mixed-* fallout downstream

[tyrsson]

Context

Downstream findings tracked at php-db/phpdb-mysql#65 (part of phpdb-mysql#60, mago analyze fixes).

Data

Two untyped array boundaries cause mixed-typed values to propagate wherever they're consumed downstream:

• AbstractConnection::$connectionParameters (src/Adapter/Driver/AbstractConnection.php:13) — declared protected array $connectionParameters = []; with no shape.
• ColumnInterface::getOptions(): array (src/Sql/Ddl/Column/ColumnInterface.php:22) and matching CreateTable::getOptions() / AlterTable::getOptions() — declared array with no shape.

@simon-mundy has the most context on this part of the SQL/metadata handling.