topic Re: Map Using in QlikView

Map Using

gerhardl — Fri, 19 Feb 2016 06:56:18 GMT

Hi,

I'm trying to replace all instance of the word "JJ" or "Jay Jays" with the word "Refinery" in my module. But these will not be the full field values, so the store name for instance may be "JJ - Cape Town" which I then want to change to "Refinery - Cape Town".

These are on multiple fields so I do NOT want to use the REPLACE function, I want to use the "MAP USING" function.

For some reason it's not working, and I think maybe because I need wildcard characters since I'm only replacing PART of the field values.

Currently I have the following:

RefineryMap:

Mapping LOAD

INLINE [

MapString, MapValue

JJ, Refinery];

MAP * using RefineryMap;

Data:

LOAD

*normal load script*

Re: Map Using

tresB — Fri, 19 Feb 2016 07:11:18 GMT

MapSubString() - is the function that could help you here.

Re: Map Using

gerhardl — Fri, 19 Feb 2016 07:13:17 GMT

Sorry, but where exactly?

Like this?

RefineryMap:

Mapping LOAD

INLINE [

MapString, MapValue

JJ, Refinery];

MapSubString * using RefineryMap;

Data:

LOAD

*normal load script*

Re: Map Using

sunilkumarqv — Fri, 19 Feb 2016 07:23:19 GMT

Please refer -

Mapping … and not the geographical kind

Re: Map Using

tresB — Fri, 19 Feb 2016 07:26:24 GMT

Well, I see (carefully) your point now. Yes that way it doesn't work. If individual field mapping would be an option, then you could use that function.

Re: Map Using

tamilarasu — Fri, 19 Feb 2016 07:28:46 GMT

From help file.

Re: Map Using

tresB — Fri, 19 Feb 2016 07:33:09 GMT

You could probably run a loop and use the MapSubstring() function as an alternative.

Re: Map Using

tamilarasu — Fri, 19 Feb 2016 07:33:50 GMT

Something Like below

Map1:  
Mapping load * inline [ 
x, y 
1, one
2, Two 
3, Three ] ;

Data:
LOAD [Employee #],  
    MapSubstring ('map1', [Employee #]) as NewEmployeeID
FROM
Book1.xlsx
(ooxml, embedded labels, table is Sheet1);

Re: Map Using

gerhardl — Fri, 19 Feb 2016 07:36:08 GMT

Thanks, but as mentioned, I do not want to do this on every single field that may contain JJ - which is why I want to make use of the MAP...USING statement.

I just need to figure out how to use a wildcard in that function, something like this,

RefineryMap:

Mapping LOAD

INLINE [

MapString, MapValue

JJ, Refinery];

MAP '*Field1*', '*Field2*', '*Field3*' using RefineryMap;

Data:

LOAD

*normal load script*

Re: Map Using

jonathandienst — Fri, 19 Feb 2016 07:37:06 GMT

Your script with mapsubstring would be something like:

RefineryMap:

Mapping LOAD

INLINE [

MapString, MapValue

JJ, Refinery];

Data:

LOAD

MapSubString('RefineryMap', Code) As Refinary,

*normal load script*

Mapsubstring works like Applymap, except that it looks inside the string ("Code" in the example above) and replaces the substring.

Re: Map Using

jonathandienst — Fri, 19 Feb 2016 07:40:20 GMT

Unfortunately, you cant do that. Map Using will always look at the entire string. You will have to do it field by field, either by Replace or MapSubstring. You surely can't have that many fields containing these names?

Re: Map Using

gerhardl — Fri, 19 Feb 2016 07:44:11 GMT

This is from the QV Manual, which surely implies I can do it?

And yes, it is unfortunately in a lot of fields. It is the name of a company that is changing, and it is referenced in store names, company codes, transaction descriptions, free text comments, etc...

Re: Map Using

jonathandienst — Fri, 19 Feb 2016 07:53:12 GMT

That is for Map Using which looks at the entire field. The wildcard selects the fields to be mapped, not the field contents where the mapping happens. For example

Map A* Using ....

will apply the mapping to the fields A1, Abracadabra, but not B1 or CompanyName. But it will look at the entire content of these fields for the mapping lookup - which is not your requirement in your original post.