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From "Pavel Tupitsyn (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (IGNITE-3325) .NET: LINQ Take method does not work within CompiledQuery
Date Wed, 29 Jun 2016 12:51:37 GMT

    [ https://issues.apache.org/jira/browse/IGNITE-3325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15334040#comment-15334040
] 

Pavel Tupitsyn edited comment on IGNITE-3325 at 6/29/16 12:50 PM:
------------------------------------------------------------------

There are other corner cases, like using same lambda argument twice in the query.
To solve all the limitations once and for all, we should change the API from {code}Compile(Func<T1,
IQueryable<T>> query){code} to {code}Compile(Expression<Func<T1, IQueryable<T>>>
query){code}
This will allow to analyse expression in full detail and substitute arguments in any order,
and allow constants.

Old methods should be kept to preserve backwards compatibility.
Add a new class CompiledQuery2 (numeric suffix is according to Framework Design Guidelines
https://msdn.microsoft.com/en-us/library/ms229045(v=vs.110).aspx).


was (Author: ptupitsyn):
There are other corner cases, like using same lambda argument twice in the query.
To solve all the limitations once and for all, we should change the API from {code}Compile(Func<T1,
IQueryable<T>> query){code} to {code}Compile(Expression<Func<T1, IQueryable<T>>>
query){code}
This will allow to analyse expression in full detail and substitute arguments in any order,
and allow constants.

Old methods should be kept to preserve backwards compatibility.

> .NET: LINQ Take method does not work within CompiledQuery
> ---------------------------------------------------------
>
>                 Key: IGNITE-3325
>                 URL: https://issues.apache.org/jira/browse/IGNITE-3325
>             Project: Ignite
>          Issue Type: Bug
>          Components: community, platforms
>    Affects Versions: 1.6
>            Reporter: Pavel Tupitsyn
>            Assignee: Pavel Tupitsyn
>             Fix For: 1.7
>
>
> User reported that the following code fails with "Error compiling query: all compiled
query arguments should come from enclosing delegate parameters."
> {code}
> Func<int,int,int,IQueryCursor<ICacheEntry<int, OrderEntity>>> qry =

>                 CompiledQuery.Compile((int x, int y,int z) => orderCache.AsCacheQueryable().Where(e
=> e.Value.OrderId % x == z).Take(y));
> {code}



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