code: @Support({SQLDialect.POSTGRES})
      public static <T> Field<T[]> arrayAggNoNulls(Field<T> field) {
          return DSL.field("array_remove(array_agg({0}), NULL)", field.getDataType().getArrayType(), field);
      }
docs: Like {@link #arrayAgg}, but uses {@code array_remove} to eliminate
  SQL {@code NULL} values from the result.
  
  @param field the field to be aggregated
  @param <T> the type of the field
  @return a {@link Field} representing the array aggregate
  
  @see <a href="http://www.postgresql.org/docs/9.3/static/functions-aggregate.html"/>