Archive for the 'qStudio' Category
October 12th, 2022 by Ryan Hamilton
qStudio is the number one code editor, server browser and development environment for kdb+.
Today we are launching Pulse, a real-time SQL visualization tool for almost any SQL database.
Within Pulse we have recreated almost all the functionality of qStudio in web form.
If you’ve ever wanted to:
- Share queries and results
- Run analysis from any machine with a browser without a need to install qStudio
- Chart results using a modern charting library
You should consider using Pulse as a shared HTML5 based complement to qStudio..
As you can see below, pulse can be made to look almost the exact same as qStudio. It features the familiar configurable layout with a table/console/charting result panel that allows you to see your result in all formats at once.
Additionally you can
- Bookmark,copy and share links
- Use it with kdb+, postgresql, mysql, oracle and H2 databases
- Try many more chart types including 3D.
Try Pulse Now
April 2nd, 2018 by admin
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
Download
Some example charts:
April 2nd, 2018 by admin
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.
April 2nd, 2018 by admin
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:
dt |
LSE |
BTS |
NAS |
ASE |
NYQ |
SES |
TSE |
HKG |
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.
April 1st, 2018 by Ryan Hamilton
“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:
April 13th, 2017 by Ryan Hamilton
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.
April 13th, 2017 by Ryan Hamilton
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 .Q.bt[]:
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.
June 25th, 2016 by Ryan Hamilton
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..
February 15th, 2016 by admin
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.
April 23rd, 2015 by admin
Since our last qStudio kdb+ IDE announcment we have added a lot of new features:
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