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High-level database API. The constructors here are defined in terms of those in doobie.free.connection but differ in the following ways:

• Enumerated values represented by Int values in JDBC are mapped to one of the proper types defined in doobie.enum.
• Nullable values are represented in terms of Option.
• Java collection types are translated to immutable Scala equivalents.
• Actions that compute liftime-managed resources do not return the resource directly, but rather take a continuation in the resource's monad.
• Actions that compute values of impure types (CLOB, InputStream, etc.) do not appear in this API. They are available in the low-level API but must be used with considerable caution.
• An exception to the above rule is that actions consuming or returning Scala Array are available here but use scalaz.ImmutableArray or List, depending on usage.
• Lifting actions, low-level type mapping actions, and resource management actions do not appear in this API.