| Class | Sequel::Postgres::Adapter | 
| In: | lib/sequel/adapters/postgres.rb | 
| Parent: | ::PGconn | 
PGconn subclass for connection specific methods used with the pg, postgres, or postgres-pr driver.
Apply connection settings for this connection. Current sets the date style to ISO in order make Date object creation in ruby faster, if Postgres.use_iso_date_format is true.
     # File lib/sequel/adapters/postgres.rb, line 132
132:       def apply_connection_settings
133:         super
134:         if Postgres.use_iso_date_format
135:           sql = "SET DateStyle = 'ISO'"
136:           @db.log_info(sql)
137:           execute(sql)
138:         end
139:         @prepared_statements = {} if SEQUEL_POSTGRES_USES_PG
140:       end
          Execute the given SQL with this connection. If a block is given, yield the results, otherwise, return the number of changed rows.
     # File lib/sequel/adapters/postgres.rb, line 144
144:       def execute(sql, args=nil)
145:         q = nil
146:         begin
147:           q = args ? async_exec(sql, args) : async_exec(sql)
148:         rescue PGError => e
149:           begin
150:             s = status
151:           rescue PGError
152:             raise Sequel.convert_exception_class(e, Sequel::DatabaseDisconnectError)
153:           end
154:           status_ok = (s == Adapter::CONNECTION_OK)
155:           status_ok ? raise : Sequel.convert_exception_class(e, Sequel::DatabaseDisconnectError)
156:         ensure
157:           block if status_ok
158:         end
159:         begin
160:           block_given? ? yield(q) : q.cmd_tuples
161:         ensure
162:           q.clear
163:         end
164:       end