v8.0.0

A major change the the API was made in v8 to seperate concerns between the different SQL statement types.

Why the change?

1. There were feature requests that could not be cleanly implemented with everything in a single dataset.
2. Too much functionality was encapsulated in a single datastructure.
   • It was unclear what methods could be used for each SQL statement type.
   • Changing a feature for one statement type had the possiblity of breaking another statement type.
   • Test coverage was decent but was almost solely concerned about SELECT statements, breaking them up allowed for focused testing on each statement type.
   • Most the SQL generation methods (ToInsertSQL, ToUpdateSQL etc.) took arguments which lead to an ugly API that was not uniform for each statement type, and proved to be inflexible.

What Changed

There are now five dataset types, SelectDataset, InsertDataset, UpdateDataset, DeleteDataset and TruncateDataset

Each dataset type has its own entry point.

• goqu.From, Database#From, DialectWrapper#From - Create SELECT
• goqu.Insert, Database#Insert, DialectWrapper#Insert - Create INSERT
• goqu.Update, Database#db.Update, DialectWrapper#Update - Create UPDATE
• goqu.Delete, Database#Delete, DialectWrapper#Delete - Create DELETE
• goqu.Truncate, Database#Truncate, DialectWrapper#Truncate - Create TRUNCATE

ToInsertSQL, ToUpdateSQL, ToDeleteSQL, and ToTruncateSQL (and variations of them) methods have been removed from the SelectDataset. Instead use the ToSQL methods on each dataset type.

Each dataset type will have an Executor and ToSQL method so a common interface can be created for each type.