3 weeks ago
Is there any way to do this? `# looks to always be creating a copy of the original list for `g/`u, whether it's applied on a list reference or value. I wrote a C function to set the list object's u member (x->u) to 0, and from within q called this function and followed it up with re-applying the attribute (`g#) and this combination seems to clear the attribute without making a copy and also removes the references to the previous attribute data, allowing it to be garbage collected by .Q.gc. Is there another way? Thanks in advance.
3 weeks ago
Thanks for your question @alvi_kabir919 !
Looking forward to seeing if the community can suggest a way of achieving this.
2 weeks ago
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 work but it might also break in a future version when kdb+ internals change.
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