HI all, it can apply some function to a column, but if it possible to
apply some function to selected records of a column? Do something like
"update price*2 from trade where sym=xxx", is that possible?
HI allI have 2 functions, say
below:func1[param1;param2]func2[param3;param4]And now both need some
kind of caching to speed it up. thus I having updating the naming of
above to func1Impl[param1;param2]func2Impl[param3;param4]And for func1,
it change ...
HI allIf I try to create a IPC connection when the server is busy for a
long query, will hopen fail with timeout and it will wait until the long
query finished? Say I haven't turn on the multi-thread support and KDB
server running in single thread mo...
HI, I have a CSV file like to load to KDB[user@server path]$ wc
/data/file.csv 2785438 11014912 239200400 /data/file.csvHowever, if I
run this line to load the CSV:count tt:tabColName xcol ("sssssissfdd";
enlist csv) 0:(`:/data/file.csv);It is only l...
Thanks a lot JosephYes "q)count read0`:/data/file.csv" does return the
identical line count as wc return. However, I sure there is no empty
line and for "q)group count each read0`:/data/file.csv" there is no 0
key entry, what else I can do to investi...
There is a way you can create your own heartbeat from KDB process, when
the Java client start and create the KDB connection, you can call a
function and passing the handle ( .z.w ) to KDB process, say, in a
dictionary.Then the KDB process can setup a...