Allow the result of count(uid) to be assigned to a var.

[martinmr]

Allow expressions of the form "f as count(uid)".

When resolving the value of such a variable inside a math block it gets
treated as a constant.

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This change is 

[manishrjain]

Looks good. Just remove the glog.Infof.

Reviewed 4 of 4 files at r1.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @martinmr)

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query/query.go, line 1505 at r1 (raw file):

		}

		glog.Infof("value %v", int64(len(sg.DestUIDs.Uids)))

Don't add logs in query execution paths. They can get very expensive.

[srfrog]

Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @manishrjain)

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query/query.go, line 1505 at r1 (raw file):

Previously, manishrjain (Manish R Jain) wrote…

Don't add logs in query execution paths. They can get very expensive.

oops actually that was a debug check. thanks for noticing

[srfrog]

Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @manishrjain)

[martinmr]

Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @manishrjain)

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query/query.go, line 1505 at r1 (raw file):

Previously, srfrog (Gus) wrote…

oops actually that was a debug check. thanks for noticing

Done. Thanks for catching this, this was just a debug check.