Returns a new instance of PgSqlArray that represents an empty array of given type.
Remarks
Empty array is PgSqlArray with Rank=0 and zero count of elements. But keep in mind that empty PgSqlArray is not equal to Null. When you post data at the PostgreSQL database, Null is interpreted as db null, while empty PgSqlArray is interpreted as an empty value of the PostgreSQL array data type.