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From "Pavel Tupitsyn (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-4904) .NET: DML via LINQ
Date Sat, 01 Apr 2017 20:19:41 GMT
Pavel Tupitsyn created IGNITE-4904:
--------------------------------------

             Summary: .NET: DML via LINQ
                 Key: IGNITE-4904
                 URL: https://issues.apache.org/jira/browse/IGNITE-4904
             Project: Ignite
          Issue Type: New Feature
          Components: platforms
    Affects Versions: 1.9
            Reporter: Pavel Tupitsyn
             Fix For: 2.0


Perform bulk update operations via LINQ: {{UPDATE WHERE}}, {{DELETE WHERE}}. Insert can already
be done on object level with {{ICache.PutAll}}.

1) {{DELETE WHERE}}. This is quite simple. We can provide an extension method like this:

{code}
public static int DeleteAll<K, V>(this ICache<K, V> cache, IQueryable<ICacheEntry<K,
V>> items);
{code}

2) {{UPDATE WHERE}}. This is tricky, because LINQ only works with expression trees, and multi-line
methods are not supported. We should come up with a way to provide a list of columns and values,
something like

{code}
public static int UpdateAll<K, V>(this ICache<K, V> cache, IQueryable<ICacheEntry<K,
V>> items, params UpdateAction[] actions);
{code}

where UpdateAction can consist of a MemberExpression and a value for that member.

We should probably do delete as a separate task first.



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