export query/4 to support manually passing connection (#95)

* export query/4 to support manually passing connection

* add changelog entry for export/4

Author: tsloughter

CHANGELOG.md

@@ -6,6 +6,8 @@
 
 - Support unix domain socket host names
   [#90](https://github.com/erleans/pgo/pull/90)
+- Export `pgo:query/4` to support passing a connection directly to `query`
+  [#95](https://github.com/erleans/pgo/pull/95)
 
 ### Fixed
 

src/pgo.erl

@@ -13,6 +13,7 @@
          query/1,
          query/2,
          query/3,
+         query/4,
          transaction/1,
          transaction/2,
          transaction/3,

test/pgo_basic_SUITE.erl

@@ -22,7 +22,8 @@ cases() ->
      rows_as_maps, json_jsonb, types,
      int4_range, ts_range, tstz_range, numerics,
      hstore, records, circle, path, polygon, line,
-     line_segment, tid, bit_string, arrays, tsvector].
+     line_segment, tid, bit_string, arrays, tsvector,
+     query_arity_4].
 
 init_per_suite(Config) ->
     application:load(pg_types),
@@ -437,3 +438,12 @@ tsvector(_Config) ->
                  pgo:query("SELECT $1::tsvector", [[{<<"a">>,[{1,'A'}]},
                                                     {<<"cat">>,[{5,null}]},
                                                     {<<"fat">>,[{2,'B'},{4,'C'}]}]])).
+
+query_arity_4(_Config) ->
+    {ok, Ref, Conn} = pgo:checkout(default),
+
+    ?assertMatch(#{rows := [{1}]}, pgo:query("select 1", [], #{}, Conn)),
+
+    pgo:checkin(Ref, Conn),
+
+    ok.