Class Sequel::Adapter
In: lib/sequel/adapters/postgres.rb
Parent: ::PGconn

PGconn subclass for connection specific methods used with the pg, postgres, or postgres-pr driver.

Methods

apply_connection_settings   check_disconnect_errors   execute  

Included Modules

Sequel::Postgres::AdapterMethods

Attributes

prepared_statements  [R]  Hash of prepared statements for this connection. Keys are string names of the server side prepared statement, and values are SQL strings.

Public Instance methods

apply_connection_settings()

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.

[Source]

     # File lib/sequel/adapters/postgres.rb, line 150
150:       def apply_connection_settings
151:         super
152:         if Postgres.use_iso_date_format
153:           sql = "SET DateStyle = 'ISO'"
154:           execute(sql)
155:         end
156:         @prepared_statements = {} if SEQUEL_POSTGRES_USES_PG
157:       end
check_disconnect_errors() {|| ...}

Raise a Sequel::DatabaseDisconnectError if a PGError is raised and the connection status cannot be determined or it is not OK.

[Source]

     # File lib/sequel/adapters/postgres.rb, line 161
161:       def check_disconnect_errors
162:         begin
163:           yield
164:         rescue PGError =>e
165:           begin
166:             s = status
167:           rescue PGError
168:             raise Sequel.convert_exception_class(e, Sequel::DatabaseDisconnectError)
169:           end
170:           status_ok = (s == Adapter::CONNECTION_OK)
171:           status_ok ? raise : raise(Sequel.convert_exception_class(e, Sequel::DatabaseDisconnectError))
172:         ensure
173:           block if status_ok
174:         end
175:       end
execute(sql, args=nil) {|q| ...}

Execute the given SQL with this connection. If a block is given, yield the results, otherwise, return the number of changed rows.

[Source]

     # File lib/sequel/adapters/postgres.rb, line 179
179:       def execute(sql, args=nil)
180:         q = check_disconnect_errors{@db.log_yield(sql, args){args ? async_exec(sql, args) : async_exec(sql)}}
181:         begin
182:           block_given? ? yield(q) : q.cmd_tuples
183:         ensure
184:           q.clear
185:         end
186:       end

[Validate]