Real constructor (the one which is used)

Checks whether the column limit is reached and if not it increments the column count.

Checks, if option was already specified, and if it is the case, throws

This method checks Ctas statements has distribution option, which is required. If no distribution option mentioned, this method throws parser error saying "The CTAS statement requires a distribution option"

This method checks External Table Ctas statements has not Rejected Row Location option. If Rejected Row Location option mentioned, this method throws parser error saying "REJECTED_ROW_LOCATION cannot be specified in a CREATE EXTERNAL TABLE AS SELECT statement."

This method checks a create table statement for being a hekaton table with an inline filtered index. This is currently not exposed and not allowed.

This method checks hekaton tables for nonclustered column store indexes, which are not allowed.

Checks the retention period duration and throws an error if it is not positive number.

Checks if generated always columns that are generated always as user id/name start/end are unique within table definition and if period definition exists when trying to create table with those columns

Checks if table definition contains 'generated always' columns that match period definition, if period definition exists.

Checks, if TimeLiteral is valid and if not, throws