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由 Ryuta Kamizono 提交于
Slightly refactoring `PostgreSQLColumn`. `array` should be readonly. `default_function` should be initialized by `super`. `sql_type` has been removed `[]`. Since we already choose to remove it we should not change.
3225ebfa
Slightly refactoring `PostgreSQLColumn`. `array` should be readonly. `default_function` should be initialized by `super`. `sql_type` has been removed `[]`. Since we already choose to remove it we should not change.