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Home Forums kdb+ SQL query to Functional query[Parse Tree] Re: SQL query to Functional query[Parse Tree]

  • Laura

    Administrator
    September 24, 2021 at 12:00 am

    Hi David,

    Thanks for your kindly reply. I want to use functional query, because I have in each table a field(time-date) to be converted into timestamp. So, instead of using something like this:

    update "p"$datefield from dictionary[`table1] 
    update "p"$datefield2 from dictionary[`table2] 
    update "p"$datefield3 from dictionary[`table3]

    I wanted to use this:

    coldic:`table1`table2`table2!`datafield`datafield2`datafield3 {![`dictionary[x];();ob;(enlist `coldic[x])!enlist($;"p";`coldic[x])] x} each key coldic

    But it is not updating the tables, this is the output :

    “” “” “” “” “” “” “” “” “” “” “” “” “” “” “” “” “” “” “” “” “” “” ..

    I’m sorry for not being clear in my concern,

    Thanks,

    Richard