kdb+ and q
Q+A on all things kdb+ database and the q language
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real time data streaming from tickerplant

Hi, I have built a real time subscriber (RTS) to tickerplant , from which I would like to stream such data to the downstream. I want: - data can be streamed to the downstream as long as it is updated, without any query. - flow like this: data publish...

renbright by New Contributor II
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right to left evaluation

hi i m new to q and array programming language. i m having trouble understanding wat it means to be right to left evaluation. i was expecting the 2nd output should be 11 154 but this is not the case. im confused when the left operand of * operator ca...

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Fastest Fibonacci sequence generator

Hello, I've been playing around with generating Fibonacci sequences with the goal of learning how to write performant q code. First, the solution given in the docs, while elegant, is hardly performant: fib:{x,sum -2#x} \ts 1000 fib/0 1 / 0 16768 \ts ...

albin by New Contributor II
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Reducing RAM usage when re-enumerating symbol columns

Hi, Is there a method to re-enumerate symbol columns in a splayed table without loading in the entire column file? This is part of a data copy between two HDBs, and we want to avoid pulling the entire column into memory if possible. Looked at using 1...

eohara_kdb by New Contributor III
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