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Questions about Querying Data from an RDBMS

harshav

with Reference to this below URL,
forum.appian.com/.../Querying_Data_From_an_RDBMS.html
There are some doubts out of my interest.
Lets consider a scenario, like we have a view which is having 100k of data and it is trying to fetch the data with pagination with 25 records per page. we are using Query rules and we are in version 7.4
Knowing that pagination is given it will load only 25 records per page but our doubt is since pagination is used in the expression rule of displaying the data in grid,
1.Is Query Rule fetching all the records and showing 25 per page or is it hitting the db for the next 25 records,
2.Is this the same way how Query Entity works or is it different.
3.Knowing that the maximum limit of data for Query rule is 1 MB, is it the same for Query Entity or does this differ.
4.How does the performance of Query rule and Query Entity differ if the working of both are same.
Please Sugges...

OriginalPostID-196692

OriginalPostID-196692

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    philb: i am not implying that query rule ignores the paging given to it, but what i state here is that if we are fetching all records suppose 100 from our database and we want to show it as 10 per page , in this case query rule will fetch all 100 and but on our grid we are showing 10 per page. Secondly, when i say that performance wise query entity is better i say it because in query entity you can limit the selection and also you can have OR operator in query entity which we do not get there in query rule. I hope i am making sense here.
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    philb: i am not implying that query rule ignores the paging given to it, but what i state here is that if we are fetching all records suppose 100 from our database and we want to show it as 10 per page , in this case query rule will fetch all 100 and but on our grid we are showing 10 per page. Secondly, when i say that performance wise query entity is better i say it because in query entity you can limit the selection and also you can have OR operator in query entity which we do not get there in query rule. I hope i am making sense here.
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