crossJoin function
Creates a sql cross join that can be used in SimpleSelectStatement.join.
The optional useColumns parameter (defaults to true) can be used to
exclude the other table from the result set. When set to false,
TypedResult.readTable will return null for that table.
See also:
Implementation
Join crossJoin(HasResultSet other, {bool? useColumns}) {
return Join._(_JoinType.cross, other, null, includeInResult: useColumns);
}