equery with array input doesn't work with select ... where ... in ($1)

[dantswain]

The following query works:

pgsql:equery(C, "select name from servers where id = any ($1)", [[1, 2, 4]]).

whereas this one does not:

pgsql:equery(C, "select name from servers where id in ($1)", [[1, 2, 4]]).

The only difference is the use of id in ($1) vs. id = any ($1). The second version results in an error:

=ERROR REPORT==== 6-Aug-2013::10:04:58 ===
** State machine <0.1053.0> terminating
** Last message in was {'$gen_sync_event',
                           {<0.1051.0>,#Ref<0.0.0.199>},
                           {equery,
                               {statement,[],
                                   [{column,<<"name">>,varchar,-1,54,1}],
                                   [int4]},
                               [{int4,[1,2,4]}]}}
** When State == ready
**      Data  == {state,undefined,<0.1054.0>,5000,
                        [{<<"application_name">>,<<>>},
                         {<<"client_encoding">>,<<"UTF8">>},
                         {<<"DateStyle">>,<<"ISO, MDY">>},
                         {<<"integer_datetimes">>,<<"on">>},
                         {<<"IntervalStyle">>,<<"postgres">>},
                         {<<"is_superuser">>,<<"on">>},
                         {<<"server_encoding">>,<<"UTF8">>},
                         {<<"server_version">>,<<"9.2.3">>},
                         {<<"session_authorization">>,<<"postgres">>},
                         {<<"standard_conforming_strings">>,<<"on">>},
                         {<<"TimeZone">>,<<"US/Central">>}],
                        undefined,
                        {<0.1051.0>,#Ref<0.0.0.198>},
                        undefined,
                        {11102,347906346},
                        {statement,[],undefined,[int4]},
                        73}
** Reason for termination =
** {badarg,[{pgsql_binary,encode,2,[{file,"src/pgsql_binary.erl"},{line,14}]},
            {pgsql_connection,encode_parameter,1,
                              [{file,"src/pgsql_connection.erl"},{line,626}]},
            {pgsql_connection,encode_parameters,4,
                              [{file,"src/pgsql_connection.erl"},{line,618}]},
            {pgsql_connection,ready,3,
                              [{file,"src/pgsql_connection.erl"},{line,228}]},
            {gen_fsm,handle_msg,7,[{file,"gen_fsm.erl"},{line,494}]},
            {proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,239}]}]}
** exception exit: badarg
     in function  pgsql_binary:encode/2 (src/pgsql_binary.erl, line 14)
     in call from pgsql_connection:encode_parameter/1 (src/pgsql_connection.erl, line 626)
     in call from pgsql_connection:encode_parameters/4 (src/pgsql_connection.erl, line 618)
     in call from pgsql_connection:ready/3 (src/pgsql_connection.erl, line 228)
     in call from gen_fsm:handle_msg/7 (gen_fsm.erl, line 494)
     in call from proc_lib:init_p_do_apply/3 (proc_lib.erl, line 239)

Both queries work just fine if run manually from the command line, i.e.,

select name from servers where id in (1, 2, 3);

and

select name from servers where id = any (1, 2, 3);

both work fine.