Implement `pow()' WCPS function

[Piero Campalani]

Despite all exponentialExpr are implemented in Petascope (see WCPS standard Sec.7.1.17), only pow(C,p) function is missing, and should be implemented despite easily reproducible by means of sequences of products.

Pow is a unary expression (src/main/java/petascope/wcps/server/core/UnaryOperationCoverageExpr.java).

Examples:

for c in (mean_summer_airtemp)
   return encode(
      coverage averagesOverTime
      over     $T t(1:5)
      values   pow($T,3),
   "csv")

for c in (mean_summer_airtemp)
  return encode(
       pow(c[x:"CRS:1"(100:101),y:"CRS:1"(300)],3),
    "csv")

See how other similar operators are implemented, e.g. log, ln, exp.

Depends on #374

[abeccati]

Assigning that as initial easy task to familiarize with petascope code.

[Dimitar Misev]

There's no pow equivalent function in rasdaman, I guess that's why it wasn't implemented in petascope in the first place.

So the first task is to implement pow in rasdaman, and then in petascope.

[abeccati]

Opened ticket for rasdaman component (#374), this one will only address petascope component for WCPS compliance.

[Dimitar Misev]

Patch for rasql has been submitted, how is implementation in petascope progressing?

[Dimitar Misev]

Marco, what's the status of this, it was supposed to be done quite some time ago?

[swingit]

The code is written, grammar updated. To be tested. Needed to restore Rasdaman installation because of an error in updating repository. Just recovered from it. The patch will be submitted soon.

[Dimitar Misev]

The patch still hasn't been applied?

[Dimitar Misev]

I'm setting this to milestone 8.5.1 - end of August, let's please close it by then.

[Peter Baumann]

the patch has some issues, unfortunately, and needs extra effort from our side to close it. Indeed, should be closed soon.

[Dimitar Misev]

I can't find this patch in the patchmanager, can someone attach here?

[Dimitar Misev]

Ok I submitted patch.

[Peter Baumann]

patch is in.