Nesting of Commands

[Sandeep Mukhopadhyay]

Hi All

1) Do Redis supports nesting of commands like scard sinter "ASet" "BSet" ?

2) Could we have this kind of linked data structure? below

Set1 = { "value1", "value2" , "value3", {"Set2"} }

Set2 = { "value10", "value12" , "value14", {"Set5"} }

...

Set5 = { "value20", "value21" , "value22" }

if I want to evaluate scard of Set1, then it should evaluate accordingly.

Thanks,
Sandy

[Josiah Carlson]

On Fri, Mar 25, 2011 at 9:05 AM, Sandeep Mukhopadhyay
<sandee...@gmail.com> wrote:
> Hi All
> 1) Do Redis supports nesting of commands like scard sinter "ASet" "BSet" ?

No. But the intersection of sets does return the cardinality of the
resulting set already.

> 2) Could we have this kind of linked data structure? below
> Set1 = { "value1", "value2" , "value3", {"Set2"} }
> Set2 = { "value10", "value12" , "value14", {"Set5"} }
> ...
> Set5 = { "value20", "value21" , "value22" }
> if I want to evaluate scard of Set1, then it should evaluate accordingly.

This has been discussed before, and the resulting discussion basically
lead to: multi-layered data structures are not necessary or desired at
this time. Search the archives for more information.

Regards.
- Josiah

[Dvir Volk]

On Fri, Mar 25, 2011 at 6:05 PM, Sandeep Mukhopadhyay <sandee...@gmail.com> wrote:

Hi All

1) Do Redis supports nesting of commands like scard sinter "ASet" "BSet" ?

yes and no...

not as you wrote it but you can do it in one roundtrip with a MULTI, storing the intersection in a destination set

MULTI

SINTERSTORE dest set1 set2

SCARD dest

EXEC

 

2) Could we have this kind of linked data structure? below

Set1 = { "value1", "value2" , "value3", {"Set2"} }

Set2 = { "value10", "value12" , "value14", {"Set5"} }

...

Set5 = { "value20", "value21" , "value22" }

 

if I want to evaluate scard of Set1, then it should evaluate accordingly.

No, you'd have to use references by key and multiple roundtrips to join them.

 

Thanks,
Sandy

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Dvir Volk

System Architect, Do@, http://doat.com