Archive for the 'qStudio' Category

qStudio 1.45 Released

qStudio 1.45 Released, we have:

  • Bugfix: Ctrl+F Search in source fixed. (Thanks Alex)
  • Added Step-Plot Chart display option
  • Added Stacked Bar Chart display option
  • Added Dot graph render display option (Inspired by Noormo)
  • Bugfix: Hidden folders/files regex now works again in file tree and command bar. Target and hidden folders are ignored by default.
  • Bugfix: Mac was displaying startup error with java 9


Some example charts:

qStudio adds Step Plots for displaying price Steps.

Our standard time-series graph interpolates between points. When the data you are displaying is price points, it’s not really valid to always interpolate. If the price was 0.40 at 2pm then 0.46 at 3pm, that does not mean it could be interpreted as 0.43 at 2.30pm. Amazingly till now, sqlDashboards had no sensible way to show taht data. Now we do:

For comparison here is the same data as a time-series graph:

The step-plot is usable for time-series and numerical XY data series. The format is detailed on the usual chart format pages.

qStudio now supports Stacked Bar Charts

qStudio has added support for stacked bar charts:

The chart format for this is: The first string columns are used as category labels. Whatever numeric columns appear next are a separate series in the chart. Each row in the data becomes one stacked bar. The table for the data shown above for example is:

2018-03-30 1047 2120 592 25 3660 303 225 383
2018-03-29 1148 2118 528 10 3656 541 215 303
2018-03-28 1201 2085 555 17 3644 302 290 339
2018-03-27 1206 2182 535 21 3604 235 299 319
2018-03-26 1239 2041 515 16 3549 251 234 363
2018-03-25 0 0 0 0 0 0 0 0
2018-03-24 0 0 0 0 0 0 0 0
2018-03-23 1379 2115 595 29 3430 138 251 348
2018-03-22 1431 2179 517 25 3399 531 222 320
2018-03-21 1530 2032 558 29 3282 438 296 359
2018-03-20 1531 2134 520 23 3256 515 265 322

You may need to “kdb pivot” your original data to get it in the correct shape.

qStudio Dot Graph Rendering of FIX Order Status

“The Financial Information eXchange (FIX) protocol is an electronic communications protocol initiated in 1992 for international real-time exchange of information related to the securities transactions and markets.”. You can see an example of a FIX message being parsed here.

What we care about is that an order goes through a lifecycle. From newly created to filled or removed. Anything that involves state-transitions or a lifecycle can be visualized as a graph. A graph depicts transitions from one state to another. Often SQL tables record every transition of that state. This can then be summarised into a count of the last state, giving something like the following:

From To label cnt
PendingCancel Calculated Rejected 50
PendingReplace Calculated Rejected 10
PendingReplace Calculated Replaced 40
Calculated PendingReplace PendingReplace 50
Calculated Filled Trade 9400
Calculated Calculated Trade 5239
PendingCancel Removed Cancelled 150
Calculated PendingCancel PendingCancel 200
New Calculated Calculated 9660
New Removed Rejected 140
Created Removed Rejected 300
Created New New 9800

qStudio now automatically converts this result table to DOT format and if you have graphviz“>graphviz installed and on the PATH, will generate the following:

Note I did tweak the table a little to add styling like so:

update style:(`Filled`Removed!("color=green";"color=red")) To,label:(label,'" ",/:cnt) from currentFixStatus

The format is detailed again in our qStudio Chart Data Format page.

This is another even simpler example:

qStudio 1.43 Released – mac save bug fixed

qStudio 1.43 Released. This:

  • Adds stack traces to kdb 3.5+
  • Fixes the mac bug where the filename wasn’t shown when trying to save a file.
  • Fixes a number of multi-threading UI problems

Download it now.

kdb 3.5 Released with Stack Trace

kdb+ 3.5 had a significant number of changes:

  • Debugger – At long last we can finally get stack traces when errors occur.
  • Concurrent Memory Allocator – Supposedly better performance when returning large results from peach
  • Port Reuse – Allow multiple processes to listen on same port. Assuming Linux Support
  • Improved Performance – of Sorting and Searching
  • Additional ujf function – Similar to uj from v2.x fills from left hand side

kdb Debugger

The feature that most interests us right now is the Debugging functionality. If you are not familiar with how basic errors, exceptions and stack movement is handled in kdb see our first article on kdb debugging here. In this short post we will only look at the new stack trace functionality.

Now when you run a function that causes an error at the terminal you will get the stack trace. Here’s a simple example where the function f fails:

Whatever depth the error occurs at we get the full depth stack trace, showing every function that was called to get there using[]:


The good news is that this same functionality is availabe in qStudio 1.43. Give it a try: qStudio.

Note: the ability to show stack traces relies on qStudio wrapping every query you send to the server with its own code to perform some analysis and return those values. By default wrapping is on as seen in preferences. If you are accessing a kdb server ran by someone else you may have to turn wrapping off as that server may limit which queries are allowed. Unfortunately stack tracing those queries won’t be easily possible.

That’s just the basics, there are other new exposed functions and variables, such as .Q.trp – for trapping calls and accessing traces that we are going to look at in more detail in future.

qStudio 1.41 Release with Custom Security

qStudio 1.41 is now available to download.

It adds the ability to use custom Security Authentications and custom JDBC drivers.
By automatically loading .jar plugins from libs folder.

After a few users reported issues around “watched expressions” we are removing the ctrl+w shortcut as it was often getting used by mistake. The last change was some internal work to improved startup/shutdown logging for debugging purposes..

qStudio kdb IDE 1.40 Released

qStudio 1.40 is now available to download.

The latest changes include:

  • No need to save changes before shutdown, unsaved changes stored till reopened.
  • Add sqlchart to system path.
  • Fix display of tables with underscore in the name.
  • Database documenter/report enhancements
  • Improved code printing
  • FileTreePanel much more efficient at displaying large number of files.

qStudio adds Nested Server Folder Support

Since our last qStudio kdb+ IDE announcment we have added a lot of new features:

Bulk importing kdb server lists

Bulk importing kdb server lists

There’s a lot of new features to allow supporting a huge number of servers efficiently:

  • Support importing HUGE number of servers:
    • 5000+ server connections are now supported
    • To prevent massive memory use, the object tree for a server is no longer refreshed at startup only on connection.
    • Allow specifying default username/password once for all servers
    • Allow nested connection folders
    • Add critical color option – servers with prod in name get highlighted in red
  • Sort File Tree Alphabetically
  • Numerous bugfixes including:
    • Fix critical Mac bug that prevented launching in some instances
    • Fix query cancelling

qStudio kdb+ GUI adds Dark Theme and Chinese Language

Based on user requests we have released a number of new features with qStudio 1.36:

Download the latest ->qStudio<- now.

Dark Code Editor Themes


Which can be set under settings->preferences


Open Results and Charts in New Window

To expand a panel into a new window click the “pop-out” icon.

This will bring up the result in a new window:


UTF-8 Chinese Language Support