I can’t understand why people are frightened of new ideas. I’m frightened of the old ones.
— John Cage
The Kx Systems technology consists of:
- kdb+ – the database
- q – an analytic and query language for kdb+
- k – the programming language underlying both kdb+ and q
This reference documents q – the main language for working with kdb+.
The kdb+ database and q language were introduced in 2003 as part of a 64-bit rewrite of the earlier kdb database. The underlying k language and databases have been developed since 1993.
Reporting bugs in Kx products¶
Licensed customers of Kx should report bugs in Kx products to the email group firstname.lastname@example.org.
Other application errors or programming assistance requests should be referred to your company’s internal support groups or via the community support channels.
When reporting a bug please don’t just email one person directly. They may be unavailable and your report would go unseen; in any case that person would automatically forward it to email@example.com.
When sending the bug report please ensure that you include the following information:
- the exact version of kdb+ being used. Including the start-up banner is the simplest way to do this:
If you aren’t using the latest version of kdb+, please confirm that the problem still occurs in the latest version (from kxdownloads.com) – the problem may already have been reported and fixed.
KDB+ 3.5t 2017.02.28 Copyright (C) 1993-2017 Kx Systems m32/ 4()core 8192MB sjt mint.local 192.168.0.39 NONEXPIRE
- information about the OS being used, machine configuration and file system (if relevant).
- details of any external code (DLLs, user-written primitives) loaded into the problem session.
If external code is being loaded into the session verify that the problem still occurs when it is not loaded.
- every Kx customer has a designated technical contact – please copy them on the email.
- if appropriate, include contact details, and information about when it’s convenient to contact you.
- detailed list of steps to be taken to reproduce the error. Try to isolate the problem to a few lines of q and a tiny sample of data.
Don’t send complete applications, or commercially sensitive code or data!
Don’t send core-dumps unless requested, they’re typically meaningful only on the machine where they were generated. If you know how to generate a backtrace from a core-dump, please do send us the backtrace.