Skip to Main Content
IBM Data and AI Ideas Portal for Customers

Shape the future of IBM!

We invite you to shape the future of IBM, including product roadmaps, by submitting ideas that matter to you the most. Here's how it works:

Post your ideas

Post ideas and requests to enhance a product or service. Take a look at ideas others have posted and upvote them if they matter to you,

  1. Post an idea

  2. Upvote ideas that matter most to you

  3. Get feedback from the IBM team to refine your idea

Help IBM prioritize your ideas and requests

The IBM team may need your help to refine the ideas so they may ask for more information or feedback. The product management team will then decide if they can begin working on your idea. If they can start during the next development cycle, they will put the idea on the priority list. Each team at IBM works on a different schedule, where some ideas can be implemented right away, others may be placed on a different schedule.

Receive notification on the decision

Some ideas can be implemented at IBM, while others may not fit within the development plans for the product. In either case, the team will let you know as soon as possible. In some cases, we may be able to find alternatives for ideas which cannot be implemented in a reasonable time.

Additional Information

To view our roadmaps:

Reminder: This is not the place to submit defects or support needs, please use normal support channel for these cases

IBM Employees:

The correct URL for entering your ideas is:

Status Future consideration
Workspace Informix
Components Informix Server
Created by Guest
Created on Jan 24, 2022

Need a function or pseudo-field to return the number of elements in a BSON array

Put in simplest terms, if I have a JSON/BSON record with an embedded array, I need to know how many elements are in the array. I need a function similar to bson_size() (which returns the string length of the total array) which instead returns the number of elements in the array. Let's call it bson_array_count() that would look something like this (simulation):

create table bson_array( one serial, data bson );insert into bson_array values (1, '{id:1234,vals:[{fname:"fred",lname:"flintstone"},{fname:"barney",lname:"rubble"},{fname:"wilma",lname:"flintstone"}]}'::bson );

select bson_array_count( data, "vals" ) from bson_array where one = 1;



MongoDB has a count() function for this and other JSON interfaces offer a length() function or pseudo-element. The latter might look like:

select data.vals.count from bson_array where one = 1;

How can we claim compatibility with the MongoDB API if we don't supply an equivalent to the count() function? And if it's available at the API layer through the wire protocol listener (I haven't seen it documented to be there) then why not implement it in the SQL layer?

Needed By Yesterday (Let's go already!)
  • Guest
    Feb 7, 2022

    It turns out that there is such a function which is undocumented:

    let nelem = bson_array_size( brec, 'array_fld' );

    Where "brec" is the name of the BSON column and "array_fld" is the name of the array type field within that BSON column value as a quoted string (or the content of a host variable). Sample (using a literal JSON string cast to BSON):

    > execute function bson_array_size( '{"totmiles":320,"state_miles":[{"state":"IL","miles":15},{"state":"IN","miles":152}]}'::json::bson, 'state_miles' );



    1 row(s) retrieved.