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Module Pfs_db


module Pfs_db: sig .. end
Utility functions for database accesses

class type db_config = object .. end
val extract_db_config : Netplex_types.config_file -> db_config
Extracts the db_config from this Netplex config file:

         netplex {
           ...
           database {
             dbname = "<name of database>";  (* required *)
             host = "<hostname>";
             hostaddr = "<ipaddr>";
             port = <port>;
             user = "<user name>";
             password = "<password>";
             ro_connections_max = <c>;
           };
           ...
         }
      

See the documentation of PostgreSQL for dbname, host, hostaddr, port, user, and password (but it should be obvious).

ro_connections_max is the number of db connections dedicated for read-only database accesses. Defaults to 20.

class type ['a] async_connection = object .. end
type read_write = [ `R | `W ] 
the mode that is conventionally used for read-write connections
type read_only = [ `R ] 
the mode that is conventionally used for read-only connections
type rw_async_connection = read_write async_connection 
abbrev
type ro_async_connection = read_only async_connection 
abbrev
class ['a] connect : db_config -> ['a] async_connection
Right now, we only have a sync connect
class async_exec : 'a async_connection -> Unixqueue.event_system -> ?expect:Postgresql.result_status list -> ?params:string array -> ?binary_params:bool array -> ?copy_in_lines:string list -> string -> [Postgresql.result] Uq_engines.engine
Execution as an engine.
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