#308 Export CSV series per row should limit to 1024 columns

[High Performance Coder]

SQL Server has a 1024 column limit, Postgresql 1600, MySQL 8000, Sqlite 2000, spreadsheets about 16,384. SQL server seems to be about the tightest limit.

Suggest that the horizontal dimension be chosen to keep under this limit, rather than choosing the largest dimension as of now. In the event of not finding a dimension less than 1024, then export as a single datum per row.

[High Performance Coder]

Ticket moved from /p/minsky/ravel/684/