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gyorokpeter-kx

Please check the location of the database in your environment. You can do it using the Terminal in JupyterLab. Once you have confirmed the location, make sure you are using the right path to load the database. You could use the absolute path, or chec...

gyorokpeter-kx

As a first step you could insert printouts of .Q.w[] in between the actual operations in the query, even breaking down expressions into single operator invocations if necessary. Additionally .Q.ts can be used to figure out the time and space used by ...

gyorokpeter-kx

According to the docs at Set Attribute | Reference | kdb+ and q documentation - Kdb+ and q documentation (kx.com) : Setting or unsetting an attribute other than sorted causes a copy of the object to be made. Using a C function as a workaround might w...

gyorokpeter-kx

Can you make sure that the res variable you do the meta on is the same that you are trying to update? E.g. global vs local variable, or other queries changing it in the meantime. Or there being a space in the column name (possible if parsing from CSV...

gyorokpeter-kx

This has to do with the behavior of the ' operator (which is each is a wrapper for). If we have p:.[;();:;] , p is a binary function, as it is a projection with two elided arguments. The ' operator modifies a function to go elementwise on its argumen...

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Re: Why does the amend form of dot operator creates a projecttion like the line in .u.rep: (.[;();:;].)each x? Shouldn't it apply the function to every item in x since we do "each"? Thank y