I found total_found not exact through several tests:
In one of the tests, the total_found was 40379, the limit i set was (0,20), then i set the offset to be 2000 and the result was null. Not Until I set the offset much more lower it returned results.
What's the problem? Can anyone help me out? Thank you!
See the total variable - it is your current limit of max matches.
You can change max matches limit in searchd section of sphinx.conf
max_matches = 100000
Restart searchd.
And then in application
$cl->SetLimits(2000, 20, 100000);
Last variable is the max matches limit.
This is done in this way because of performance, lower value of max matches give you better performance.
Related
What is the maximum number of returned expressions allowed in a PostgreSQL SELECT statement?
(Not to be confused with the maximum number of columns in a table.)
I found it programmatically: 1664 (version 13).
The limit is a bit higher that the column limit of 1600. This is the error that I get when crossing the limit:
ERROR: target lists can have at most 1664 entries
The limit is defined in "src/include/access/htup_details.h" (MaxTupleAttributeNumber 1664) next to the column-amount limit (MaxHeapAttributeNumber 1600). The reason for the difference between the two limits is unclear to me.
I want to find consecutive missed visit by the site. First I created a flag if visit completion = missed then 1 else 0
Next, I created the following calculation to count the consecutive
Now my questions are following,
1) If I am counting consecutive missed visits, then shouldn’t I ignore the first index/occurrence? i.e., in this case, the count should show 8? How to do that?
2) How to aggregate it up to site level?
Looking forward to your help. Thank you in advance.
For part 1 of your question, to set the first occurence as 0, you can tweak your existing calculation: (picking up from the middle of your formula...)
...THEN IF FIRST()=0 THEN 0 ELSE PREVIOUS_VALUE(0)+1 END...
Part 2, to aggregate to site level, is more tricky. You'll need the VisitNo on Detail as it's needed for the calculation. You may need to wrap the entire calculation in:
IF LAST()=0 THEN [FormulaCalcField] END
Hence only keeping the final result of the calc. These things are complicated...
i have input like below
empid salary
10 1000
20 2000
30 3000
40 4000
the output i require in a sequential fie is like below. that is prevsal should have the salary of the previous row
empid salary prevsal
10 1000 null
20 2000 1000
30 3000 2000
40 4000 3000
i tried using a transformer by giving stage variable as prevsal=inputlink.salary and then defining a output column inputlink.salary=prevsal. i know that doesnt work logically and yes it didnt work. can anyone find me a solution for this.
You are on the right way - transformer and stage variables is the way to go.
Remember that within the transformer the data is processed top down. This means the first (top most) stage variable is processed first, then the second and so on and finally the data is put on the output links.
Having you input column: inputlink.salary
Assuming two stagevariables: svPrevSalary (top most)
and a second one svCurrentSalary
Try following assingments in the stage variable section:
1. svCurrentSalary (=) svPrevSalary
2. inputlink.salary (=) svCurrentSalary
Use
svPrevSalary
as derivation of the output link / field.
Please note that the (=) are just the idea you have to specify only svCurrentSalary for the first stage variable.
I was facing the same problem when I started to do.i was not getting the expected result.
For this question, we have to note down 2 things.
1. for which jobs I m doing.like for the server, sequential or parallel.I am working in the parallel environment.
2. pls remember the order of execution of link i.e i/o order.
code- curr_salary -> Prev_Sal,
link.salary -> curr_Salary
link to prev_salary output link to prev_salary
Note
If you working in the Parallel environment then you have to make a sequential mode in execution section in every stage.
Go to Stage-> advanced -> Excution mode-> sequential.
I think it should work. I did this practically.Transformer_Image
thanks
can any one please help me for how I can increase the PostgreSQL - max number of parameters length. I don't want to do any other way i want to use normal query as I am using. but if I am passing 90,000 parameters in IN Query then how I make it possible to execute this query?
If you believe this page https://msdn.microsoft.com/en-us/library/ms143432.aspx the number of parameters for example in a stored proc, statement, function, ... are fix.
I have a BOXI report that uses a multi-valued parameter. My requirement is to limit the selection of values to 20 (maximum input by users can not be more than 20).
Can someone please suggest a way to accomplish this?
Thanks