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Filtering SQL connection

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    Filtering SQL connection

    Hey all,

    I'm trying to connect to an Oracle table that has like almost 300,000 records. No problem making the connection. However, when I try and look at the data in a browse, it takes like 5 minutes or so to load all the records. Really, I don't want all 300,000 records to load - I want to filter certain records out immediately. I thought the Index function was what I needed, but I got the message back that said I couldn't use an Index on an SQL connection - does that sound right? If so, what do you think would be a good way to filter most of the records - especially if most are Inactive and aren't needed?

    Thanks for the help,
    Rookie

    #2
    Re: Filtering SQL connection

    Steve

    Make sure that you have the latest build of A5.

    From the menu - help - check for latest version

    I recall some recent fixes to improve efficiency.
    Al Buchholz
    Bookwood Systems, LTD
    Weekly QReportBuilder Webinars Thursday 1 pm CST

    Occam's Razor - KISS
    Normalize till it hurts - De-normalize till it works.
    Advice offered and questions asked in the spirit of learning how to fish is better than someone giving you a fish.
    When we triage a problem it is much easier to read sample systems than to read a mind.
    "Make it as simple as possible, but not simpler."
    Albert Einstein

    http://www.iadn.com/images/media/iadn_member.png

    Comment


      #3
      Re: Filtering SQL connection

      Thanks Al - good advice.

      I'm a little green with the Active link thing - but I just noticed how when using the genie you can use the Where function to filter - I think I'm on the right track now.

      Thanks again,
      Rookie

      Comment


        #4
        Re: Filtering SQL connection

        One way would be to set up an active link table that takes arguments, allowing you to specify a record number etc.

        Comment


          #5
          Re: Filtering SQL connection

          Originally posted by srodopol View Post
          Hey all,

          I'm trying to connect to an Oracle table that has like almost 300,000 records. No problem making the connection. However, when I try and look at the data in a browse, it takes like 5 minutes or so to load all the records. Really, I don't want all 300,000 records to load - I want to filter certain records out immediately. I thought the Index function was what I needed, but I got the message back that said I couldn't use an Index on an SQL connection - does that sound right? If so, what do you think would be a good way to filter most of the records - especially if most are Inactive and aren't needed?

          Thanks for the help,
          Rookie
          Indexes don't apply to active-link tables.

          when you define your active-link you can specify a 'where' clause to limit the number of selected records.

          note that when you create active-links you are given the option of creating a single active-link table, or multiple tables.

          if you use the 'multiple' option, then a5 creates all of the active-link tables using default options - no WHERE clause. so if you chose this option intially, then you have to right click on the active-link table and edit it.

          that will bring up the single table active-link builder that exposes all of the options.

          you will see that you can add a where clause to your SQL Select.

          the where clause can also include arguments. if you include arguments in the WHERE clause, a5 will prompt for the argument value when you open the table.

          e.g.

          you might define this WHERE clause:

          customerid = :whatcustomerid

          :whatcustomerid is an argument (the dialog will contain a button to define arguments)

          it is all very slick. and assuming that your WHERE clause results in a much smaller set of records (and assuming that your ORACLE server can execute the query quickly - because it has all of the necessary indexes in place), the active-link table will open quickly.

          as you correctly point out - it is crazy to bring down 300,000 records from the server to the client - you could not possibly need to look at that many records at once!!

          Comment


            #6
            Re: Filtering SQL connection

            Selwyn, speaking of creating multiple Active Link Tables against Oracle - recent fixes (unless it is just that my old PC couldn't handle it!) have actually sorted this out, this now works very well (it used to crash when I tried to create multiple A-L-Ts) :)

            Comment


              #7
              Re: Filtering SQL connection

              I have a report based on an active-link table connected to a View in a MySQL database. I setup a filter in the report to filter the records but it's not working. Ultimately, I need to run this report from a grid component with an action button and set the filter in the action javascript. The report runs but the data isn't filtered. Any idea what the problem is?

              Thanks,
              BobA
              Robert Adler
              Alpha Anywhere Programmer/Developer
              Eagle Dbase Solutions, LLC
              http://www.eagledbasesolutions.com/

              sigpic

              Comment


                #8
                Re: Filtering SQL connection

                why are you basing your report on an active-link table?

                you should use the <SQL Datasource> option when you create your report and go against the sql directly. There is no reason to use an active-link table in a report.

                Comment


                  #9
                  Re: Filtering SQL connection

                  I encountered the same problem going against the mysql database directly. The issue seems to have been that the field I was filtering on was defined as "bigint" in the table. In the View I used the "Cast" function to change the data type to character. That solved the filtering issue. My question now is: Does A5 not work well with the "bigint" data type? Is there a recommended work-around other than what I used?

                  Thanks,
                  Bob A.
                  Robert Adler
                  Alpha Anywhere Programmer/Developer
                  Eagle Dbase Solutions, LLC
                  http://www.eagledbasesolutions.com/

                  sigpic

                  Comment


                    #10
                    Re: Filtering SQL connection

                    i do not think that there is any problem printing a filtered report on a mysql table that has a bigint field - and the filter is on the bigint field.

                    this video shows how I tested this.


                    http://screencast.com/t/ZxqdCvh9yJIj

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