fix(c/driver/postgresql): suppress console spam

Fixes apache#1023.

c/driver/postgresql/connection.cc

@@ -744,6 +744,10 @@ class PqGetObjectsHelper {
  struct ArrowArray* fk_column_name_col_;
 };
 
+// A notice processor that does nothing with notices. In the future we can log
+// these, but this suppresses the default of printing to stderr.
+void SilentNoticeProcessor(void* /*arg*/, const char* /*message*/) {}
+
 } // namespace
 
 AdbcStatusCode PostgresConnection::Cancel(struct AdbcError* error) {
@@ -1398,12 +1402,17 @@ AdbcStatusCode PostgresConnection::Init(struct AdbcDatabase* database,
  database_ =
  *reinterpret_cast<std::shared_ptr<PostgresDatabase>*>(database->private_data);
  type_resolver_ = database_->type_resolver();
+
  RAISE_ADBC(database_->Connect(&conn_, error));
+
  cancel_ = PQgetCancel(conn_);
  if (!cancel_) {
  SetError(error, "[libpq] Could not initialize PGcancel");
  return ADBC_STATUS_UNKNOWN;
  }
+
+ std::ignore = PQsetNoticeProcessor(conn_, SilentNoticeProcessor, nullptr);
+
  return ADBC_STATUS_OK;
 }