Is there A Way To Copy Records To A New table On Users PC and Run Queries From There?

[Ray in Capetown]

Re: Is there A Way To Copy Reacords To A New table On Users PC and Run Queries From There?

No need to.
It has only six methods http://wiki.alphasoftware.com/StringDictionary

[MoGrace]

Re: Is there A Way To Copy Records To A New table On Users PC and Run Queries From There?

Edit: Here is the working function

FUNCTION SD_Var AS C (sdvar AS C, tname AS C, fldname AS C, fldvalue AS C)
'DESCRIPTION: Creates a global StringDictionary var and populates with field data from table
'all parameters are required 
'Ex1 SD_Var("sd_setup","Machs","Machno","Setup") 
'	Result from IW:
'	?sd_setup.get("01")
'	= "Jersey"
'Ex2 using an expression for fldvalue: 
'	txt = "alltrim(t.cut)+chr(46)+remspecial(t.size)" 'removes the inches symbol (30") from the field
'	SD_Var("sd_cutsize","Machs","Machno",txt)	
'	Result from IW:
'	?sd_cutsize.get("01")
'	= "22.30"

	evaluate_template("dim global "+sdvar+" as stringdictionary")
	evaluate_template(sdvar+".clear()")	
	dim t as p	
	dim cmd as c
	dim lst as c	
	dim newvalue as c
	dim txt as c	
	dim fldflag as L = .f.
	
	on error goto ERRMSG
	t = table.open(tname)
	'test if fldvalue is a field name
	lst = t.field_name_get()
	fldflag = word_exists(lst,fldvalue,crlf())
	
	if fldflag then	
		'uses a field name	
		txt = "t."+var->fldvalue
		cmd = convert_expression(sdvar+".Set(t."+fldname+",t."+fldvalue+")","V")
		'Traceln("txt field",txt)
		'Traceln("cmd expression",cmd)					
	else
		'uses an expression
		txt = fldvalue
		'Traceln("txt expression",txt)		
	end if
	
	t.fetch_first()											
	while .not. t.fetch_eof()
		if fldflag then		
			evaluate_template(cmd)
                        newvalue = eval(txt)			
		else
			newvalue = eval(txt)			
			evaluate_template(sdvar+".Set(t."+fldname+","+quote(newvalue)+")")
		end if
                 'Traceln("newvalue",newvalue)
		t.fetch_next()
	end while
	
	CLOSEIT:
	t.close()		
	SD_Var = txt
	end
	ERRMSG: 
	'commit_flag = .f.
	'script_play("ERRMSG")
	on error goto 0
	RESUME CLOSEIT
END FUNCTION

[Ray in Capetown]

Re: Is there A Way To Copy Records To A New table On Users PC and Run Queries From There?

Maybe take out the stringdictionary element and get your strings checked using
debug()
traceline() etc

[MoGrace]

Re: Is there A Way To Copy Records To A New table On Users PC and Run Queries From There?

Where to put the condition to test if fldvalue was a field value or an expression was my trouble - got it fixed, in case anyone is interested.

SD_Var_20160101.txt

Happy New Year!

[Ray in Capetown]

Re: Is there A Way To Copy Records To A New table On Users PC and Run Queries From There?

Robin,
it would asier to understand if you explain the circumstance and objective and what was the hurdle you overcame.?

Is objective that the result of a match may possibly be text or else a piece of code to execute?

[Ray in Capetown]

Re: Is there A Way To Copy Records To A New table On Users PC and Run Queries From There?

Robin,
it would easier to understand if you explain the circumstance and objective and what was the hurdle you overcame.?

Is objective that the result of a match may possibly be text or else a piece of code to execute?

[MoGrace]

Re: Is there A Way To Copy Records To A New table On Users PC and Run Queries From There?

The objective was to have a function I could use in the Autoexec to populate one or more global vars dimmed as StringDictionary. I use natural and primary keys extensively in my apps and both are needed for set links, lookups, etc. I know it seems I have overtaken Nigel's post, but it was his query and your solution that gave me the idea of how to get these matching values quickly without having to open a table.

An example would be that whenever the user must input a customer ID into a record, he can enter the natural key like "Fairway" to get "D0088", the primary key filled in automatically.

The hurdle was to have this function take an expression where two or more values could be used to get the needed value. With this function the list needn't be 'static' in the sense that its list can be updated on the fly - as in Nigel's scenario where the product list is constantly being updated. The function seems very fast though I haven't tested it on a truly large table.

[Allen Klimeck]

Re: Is there A Way To Copy Records To A New table On Users PC and Run Queries From There?

Be careful with StringDictionary the keys are not case sensitive so abc, Abc, aBc, abC, ABC are all the same key!

[nigeldude]

Re: Is there A Way To Copy Records To A New table On Users PC and Run Queries From There?

Hi Guys, I totally appreciate all the responses so far, I'm struggling to understand them all.

One thing that I have done so far (because Ray pointed out its a time hog), I removed the containsi(upc_multi,Var->Product_Lookup) from the long query list where I had it, I placed it in a secondary query that runs only when the 1st query doesn't find any match.

As for Robin's suggestion to edit the filter in my set structure to omit some records, I do have a set for the Product_Lookup table, but products.dbf is the only table in it. So I don't have an option to include a filter, Should I redesign the set and make Products a child table so I can include a filter?

Correct Ray, I do have a catchall for all circumstances for the cashier, the secondary query where I moved the Multi_UPC to, was always there, but it use to check only the name of the product, so if the cashier was to type "Corned Beef", they would get a list of all brands and sizes of corned beef to choose the desired one from. If I made it so that the cashier have to start specify where to search, I would solve one problem while creating another, I need it as effortlessly as possibly for them, one search box that does it all.

Pardon me for asking what seems to be common knowledge, but, what is "string dictionaries", I couldn't find that in the documentation.

[MoGrace]

Re: Is there A Way To Copy Records To A New table On Users PC and Run Queries From There?

Try a search for "StringDictionary" as one word.

Nigel, can you post a screenshot of the lookup form you are using?

[Ray in Capetown]

Re: Is there A Way To Copy Records To A New table On Users PC and Run Queries From There?

Nigel
Your scan should be the primary test.
Use the code in post 14 at the bottom starting

---- all upc numbers will be allocated to an item -----------

It was written for you. It is tested and working. Uses fields UPC, UPC_MULTI and ITEM_NUM. You no longer search the field UPC_Multi , a complete list of all barcodes exist in a global variable called sdupc. You can't view it but is contains a list of every UPC number in your table with the ITEM_NUM, viewed with sdupc.get().
Replace my table name "product" to yours. Save it as a script. run it.
Once run and anytime thereafter in the session you have instant access to any UPC scan - Using these two lines to to see if it is a scan. check it will instantly return if successful and the ITEM_NUM
Test a scan in the IW to see the ITEM_NUM.

dim local cscan as c
cScan = "900096676"  'your_scan_number, 
? sdupc.exists(cScan )
? sdupc.get(cScan)

[Ray in Capetown]

Re: Is there A Way To Copy Records To A New table On Users PC and Run Queries From There?

Be careful with StringDictionary the keys are not case sensitive so abc, Abc, aBc, abC, ABC are all the same key!

One would expect so, as with unique field values in a table.

[nigeldude]

Re: Is there A Way To Copy Records To A New table On Users PC and Run Queries From There?

OK Robin, Here is a screen shot of my Product lookup form after searching for the word "Meat"
Product_Lookup Form.jpg

OK Ray, I think I understand now what a String Dictionary is, and it does seem very promising indeed.

As instructed, I Created a script and save it. I named it "POS_ProductLookup"
I corrected the table name. So, it now looks like this:

delete sdupc
dim global sdupc as StringDictionary
pro=table.open("products") 'substitute your table name
pro.fetch_first()
while .not. pro.fetch_eof()
if pro.UPC>""
sdgl.set(pro.UPC, pro.ITEM_NUM) 'the default upc
end if
if pro.UPC_MULTI>"" ' MULTU UPC
upm=stritran(pro.UPC_MULTI,",",crlf()) 'assuming the barcodes are comma separated
for each foo in upm
sdgl.set(foo.value, pro.ITEM_NUM) 'to allocate each to the same item
next
end if
pro.fetch_next()
end while



I don't understand this part from post 14:

if sdupc.Exists(cScanstr)
idtofind using the index= sdupc.Get(cScanstr)


And in general I don't quite get how to implement it into my software.

[Ray in Capetown]

Re: Is there A Way To Copy Records To A New table On Users PC and Run Queries From There?

Did you run it, had no error?
Then in the IW type
(as if user user enters "0244")

?sdupc.Exists("0244")
=.t.
? sdupc.Get("0244")
="00000244"

and see how long it took to return the ITEM NUMBER from a UPC number
To find the record using fetch_find;
suppose tbp is your pointer to the table , "enterstr" is the user entry string

indx = tbp.index_primary_put("ITEM_NUM")
if sdupc.Exists("enterstr")
      recf=tbp.fetch_find(sdupc.Get("enterstr"))
else
      recf=tbp.fetch_find("enterstr")
end if
if recf>1 ' tbp is pointing to the record you want to use to populate the checkout item record .
    'success,  populate the sales item record
else
    'you will immediately know to do your general search
end if