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Argument is incorrect data type

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  • Argument is incorrect data type

    The offending line in the copy script is

    query.filter = "Dchanged>yesterday".and."isnotblank(\"photofilename\")"

    which works just fine without the .and. and following. Photofilename is C, 25, calculated as ALLTRIM(FILE.FILENAME_PARSE(PHOTO,"ne")) while Photo is an IFR - or is that IRF? Photofilename looks right in a form or browse and appears to be a simple filename with extension.

    I've tried about all the quote/slash/parens combinations, so the error message probably means what it says.

  • #2
    Re: Argument is incorrect data type

    A quoted string ends at the second quote mark. That's why the error. Alpha doesn't know what to do with the rest. Alpha might be trying to and the two strings on either side.

    You probably want

    query.filter = "Dchanged> {"+dtoc(var->yesterday)+"} .and. isnotblank(\"photofilename\")"

    if yesterday is a date variable.
    There can be only one.

    Comment


    • #3
      Re: Argument is incorrect data type

      Try:
      query.filter = "Dchanged>yesterday.and.isnotblank(\"photofilename\")"

      Comment


      • #4
        Re: Argument is incorrect data type

        Aha!

        query.filter = "Dchanged>yesterday.and.isnotblank(\"photofilename\")"

        The confusion was between query.filter="this.and.that" or ="this".and."that"
        The dates are both D fields, so that much worked already.

        Comment


        • #5
          Re: Argument is incorrect data type

          query.filter = "Dchanged>yesterday.and.isnotblank(\"photofilename\")"
          Is not correct, even if it may work. If it works it would only be due to yesterday being dimmed as a global variable and as an unintended consequence of how Alpha handles global variables.


          See Selwyn's post 11 and 13 in this thread.

          http://msgboard.alphasoftware.com/al...ghlight=global


          Better in the long run to understand the correct construction.
          There can be only one.

          Comment


          • #6
            Re: Argument is incorrect data type

            Unless yesterday is not a variable ....and in live yesterday is done, fixed is not a variable anymore!
            Tomorrow, remains a variable.

            Comment


            • #7
              Re: Argument is incorrect data type

              What I got from Selwyn's post was query filters cannot have variables? How do you get a value from the user without putting it in a variable?

              Code:
              DIM SHARED fromdate as D
              DIM SHARED varC_result as C
              ...
              varC_result = ui_dlg_box("Backup",<<%dlg%
              ...
              Backup entries since ...?:| [%DATE;P=popup.calendar(dtoc(fromdate));I=popup.calendar%.40fromdate!fromdate_*];
              ...
              yesterday=fromdate-1
              Dchanged is a D field, and I don't want to think about the dtoc confusion.

              Comment


              • #8
                Re: Argument is incorrect data type

                You can have all the variables you want. You shouldn't hide them inside quotes. In certain cases Alpha will try to figure out what you meant, not always.

                query.filter = "Dchanged> {"+dtoc(var->yesterday)+"} .and. isnotblank(\"photofilename\")"


                My suggestion has three parts connected/(concatenated) by plus signs

                "Dchanged> {"
                dtoc(var->yesterday)
                "} .and. isnotblank(\"photofilename\")"

                The first and last parts are plain and simple text segments that do not involve variables.
                The middle part, not enclosed in quotes, is the variable - wrapped in dtoc() to make the variable's value suitable for concatenating with the other two parts.

                Since the variable is not quoted Alpha knows to use its value rather than its name in the filter.

                firstname = "Sandy"

                query.filter = "my name is firstname and I'm a dandy"

                ? query.filter
                = "my name is firstname and I'm a dandy"

                query.filter = "my name is "+quote(firstname)+" and I'm a dandy"

                ? query.filter
                = my name is "Sandy" and I'm a dandy
                There can be only one.

                Comment


                • #9
                  Re: Argument is incorrect data type

                  Also see this for a better explanation. Cal used a slightly different approach with ctod() but the concept is the same.

                  http://wiki.alphasoftware.com/~alpha...ex+Expressions
                  There can be only one.

                  Comment


                  • #10
                    Re: Argument is incorrect data type

                    Stan,

                    Sandy said
                    Dchanged is a D field, post #7

                    The DTOC() returns a character string .
                    Dchanged (Date value) and the if the Yesterday is Date value, Both are same, Date field type.

                    Do I have to convert the Yesterday variable to Character value?
                    I mean, this
                    query.filter ="dchanged >"+s_quote( var->yesterday)
                    will work or not?

                    Thanks

                    Comment


                    • #11
                      Re: Argument is incorrect data type

                      That will work. S_quote() is different than dtoc(). Since I used dtoc() I included the { } in my literal strings. Dtoc() doesn't supply them in the string it returns.

                      No reason to prefer one over the other that I know, s_quote() is just easier. I learned the procedure before s_quote() was added to Alpha so I often do it the old way.
                      There can be only one.

                      Comment


                      • #12
                        Re: Argument is incorrect data type

                        Thanks, Stan.

                        Comment

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