class PGconn

if pg, postgres, or postgres-pr is used.
Attempt to get uniform behavior for the PGconn object no matter

def self.unescape_bytea(obj)

raises an error
If no valid bytea unescaping method can be found, create one that 
def self.unescape_bytea(obj)
  raise Sequel::Error, "bytea unescaping not supported with this postgres driver.  Try using ruby-pg, ruby-postgres, or postgres-pr."
end

def block(timeout=nil) 

def block(timeout=nil)
end

def escape_bytea(obj)

escape_bytea class method, use that instead.
If there is no escape_bytea instance method, but there is an 
def escape_bytea(obj)
  self.class.escape_bytea(obj)
end

def escape_bytea(obj)

that.
If we are using postgres-pr, use the encode_bytea method from 
def escape_bytea(obj)
  self.class.encode_bytea(obj)
end

def escape_bytea(obj)

raises an error
If no valid bytea escaping method can be found, create one that 
def escape_bytea(obj)
  raise Sequel::Error, "bytea escaping not supported with this postgres driver.  Try using ruby-pg, ruby-postgres, or postgres-pr."
end

def escape_string(str)

escape class method, use that instead.
If there is no escape_string instead method, but there is an 
def escape_string(str)
  Sequel::Postgres.force_standard_strings ? str.gsub("'", "''") : self.class.escape(str)
end

def escape_string(obj)

Raise an error if no valid string escaping method can be found. 
def escape_string(obj)
  raise Sequel::Error, "string escaping not supported with this postgres driver.  Try using ruby-pg, ruby-postgres, or postgres-pr."
end

def status 

def status
  CONNECTION_OK
end