entry.xcount not allowed multiple times in same sub-query

[roker]

This is the same issue as https://github.com/dgraph-io/dgraph/issues/921 by using different operation.

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• What version of Dgraph are you using? Latest, updated today, I have no clue as you are not tagging it if build from github (should i submit another bug)?

`root@www:/dgraph # ./dgraph version

Dgraph version : Commit SHA-1 : Commit timestamp : Branch : `

• Have you tried reproducing the issue with latest release? Yes. And the one from 6th of July

• What is the hardware spec (RAM, OS)? FreeBSD (reproducable on linux too), since it is a test machine, i gave dgraph 1Gb of RAM

• Steps to reproduce the issue (command/config used to run Dgraph). x as count( entry.x ) y as count( entry.y ) sub1 : math( x - y ) x1 as count(entry.x @filter(uid( "0x4e3" ))) y1 as count(entry.y @filter( uid( "0x4e3" ))) sum1 : math( x1 + y1 )

• Expected behaviour and actual result. Expected: It should work. Actual: Error, entry.xcount not allowed multiple times in same sub-query

[roker]

Workaround until fixed, it works but it is annoying. x as count( entry.x ) y as count( entry.y ) sub1 : math( x - y ) workaround1 : entry.x @filter(uid( "0x4e3" )) workaround2 : entry.y @filter( uid( "0x4e3" )) x1 as count(workaround1) y1 as count(workaround2) sum1 : math( x1 + y1 )

[manishrjain]

This can be done by using blocks.

{
  var(func: anyofterms(name@en, "Blade Runner")) {
    uid
    x1 as count(name@en)
  }

  var(func: anyofterms(name@en, "Blade Runner")) {
    uid
    x2 as count(name@en @filter(uid(0x27156)))  
  }

  q(func: uid(x1, x2)) {
    sub1: math(x1 - x2)
    sum1: math(x1 + x2)
  }
}