vortexsbkny
New Contributor
since ‎2016.10.06
‎2021.06.14

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Hi,How do you create an empty table with columns defined pragmatically: c1, c2, c3, This function does not work because I can't figure out how to add a column. It's not interpreting column name. tbl:{[x] c:("c" ,/: (string (1+til x))); t:([] c1:"f"$(...
For a compressed file, I noticed hcount and read0 return its uncompressed format. I could understand for read function but how do I get raw size as seen by ls?http://www.timestored.com/kdb-guides/kdb-io-file-read-write-functions`:tmp/t set t1(`:tmp/t...
Hi,It seems max(date) invoked on partitioned by date column table, looks at last (oldest) date folder and if records found there, returns empty handed. Is this how max is implemented? This may be misleading or am I supposed to delete an empty date fo...
Hi,I am having trouble retrieving size of a splayed, partitioned table. -22! reports a tiny number, few hundred bytes. I assume it does so because entire table is not memory. Related question. If I were to execute count very_large_table, does KDB hav...
Hi,The following link for throughput.q and io.q does not work. Does someone know the latest? Any additional info about io.q is also appreciatedsource:contrib/simon/ioThanks