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faldo

Variable limits

7 posts in this topic

#1 ·  Posted (edited)

Heya,

I'm trying to figure out how to work around a problem with the limitations of variables and would like some help.

I've extracted a number from a database with an SQL-UDF as follows:

$iRval = _SQL_GetTable2D(-1, "SELECT table FROM database ORDER BY id", $var, $iRows, $iColumns)

This results is an array of variables and the one i need is a value with 26 numbers.

When i call on this value, the value seems to big for a variable and the result is flawed.

As demonstration, the same problem occurs in the following example:

$var= 11111111111111111111111111
MsgBox(0, "", $var)

The message box doesn't display 11111111111111111111111111 unless i make a string out of it.

Thankfull for any suggerstions.

Cheers

Edited by faldo

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faldo,

Do you want to display the big number or actually do some operations on it? :)

If the former then you already have the solution - if the latter then the BigNum UDF might be the solution. I have no experience of using it myself - please let me know if you find it useful. ;)

M23


Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind._______My UDFs:

Spoiler

ArrayMultiColSort ---- Sort arrays on multiple columns
ChooseFileFolder ---- Single and multiple selections from specified path treeview listing
Date_Time_Convert -- Easily convert date/time formats, including the language used
ExtMsgBox --------- A highly customisable replacement for MsgBox
GUIExtender -------- Extend and retract multiple sections within a GUI
GUIFrame ---------- Subdivide GUIs into many adjustable frames
GUIListViewEx ------- Insert, delete, move, drag, sort, edit and colour ListView items
GUITreeViewEx ------ Check/clear parent and child checkboxes in a TreeView
Marquee ----------- Scrolling tickertape GUIs
NoFocusLines ------- Remove the dotted focus lines from buttons, sliders, radios and checkboxes
Notify ------------- Small notifications on the edge of the display
Scrollbars ----------Automatically sized scrollbars with a single command
StringSize ---------- Automatically size controls to fit text
Toast -------------- Small GUIs which pop out of the notification area

 

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Is the 26 digit number actually a number or is it a string made up of numbers? Because if it's a string made up of numbers, you should be referencing it as a string. If it's an actual number you should use scientific notation to reference it.

Sounds like a 26 digit number is too large to display using even 64 bits.


If I posted any code, assume that code was written using the latest release version unless stated otherwise. Also, if it doesn't work on XP I can't help with that because I don't have access to XP, and I'm not going to.
Give a programmer the correct code and he can do his work for a day. Teach a programmer to debug and he can do his work for a lifetime - by Chirag Gude
How to ask questions the smart way!

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#4 ·  Posted (edited)

Thanx for the quick responses.

The following code displays my use of the variable ($var):

$iRval = _SQL_GetTable2D(-1, "SELECT table1 FROM database ORDER BY id", $var, $iRows, $iColumns)
$hData = _SQL_Execute(-1, "SELECT table2 FROM database where id=" & $var[1][0])
_SQL_FetchData($hData, $aRow)

$var[1][0] contains a 26 digit value and everything seems OK after the first line but when i use this variable as reference to get data from another field i get the same behavior as i get when trying to display a 26 digit value in a messagebox like the example i showed above.

If i could somehow convert the value in $var[1][0] to a string my problem would be solved.

@BrewManNH: the 26 digit number is a value from a field in the database, with value i mean 1234 as compared to the string "1234".

@Melba23: i want to use the variable in another operation but it seems it gets distorted due to the maximum value-limit in a variable.

Edit: Btw, if the data in the DB-field contains a value of 10 digits, i don't get any problems, that's why i narrowed it down to the limitations of the variable itself.

Edited by faldo

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$var[1][0] = String($var[1][0])


If I posted any code, assume that code was written using the latest release version unless stated otherwise. Also, if it doesn't work on XP I can't help with that because I don't have access to XP, and I'm not going to.
Give a programmer the correct code and he can do his work for a day. Teach a programmer to debug and he can do his work for a lifetime - by Chirag Gude
How to ask questions the smart way!

I hereby grant any person the right to use any code I post, that I am the original author of, on the autoitscript.com forums, unless I've specifically stated otherwise in the code or the thread post. If you do use my code all I ask, as a courtesy, is to make note of where you got it from.

Back up and restore Windows user files _Array.au3 - Modified array functions that include support for 2D arrays.  -  ColorChooser - An add-on for SciTE that pops up a color dialog so you can select and paste a color code into a script.  -  Customizable Splashscreen GUI w/Progress Bar - Create a custom "splash screen" GUI with a progress bar and custom label.  -  _FileGetProperty - Retrieve the properties of a file  -  SciTE Toolbar - A toolbar demo for use with the SciTE editor  -  GUIRegisterMsg demo - Demo script to show how to use the Windows messages to interact with controls and your GUI.  -   Latin Square password generator

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#6 ·  Posted (edited)

$var[1][0] = String($var[1][0])

That didn't seem to work...

To see what i mean, compare these two scripts:

$var = 11111111111111111111111111
MsgBox(0, "", $var )

$var = 1111111111111111111
MsgBox(0, "", $var )

It seems a variable can't contain a value higher than 9223372036854775807

Even if i do a $var[1][0] = String($var[1][0]) the result is a value in the variable, i need it to be a string.

Edited by faldo

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#7 ·  Posted (edited)

I solved the issue with a workaround, i instructed the SQL-querry to convert the value to a string:

_SQL_GetTable2D(-1, "SELECT CAST(col1 AS char) FROM table ORDER BY id", $var, $iRows, $iColumns)

Cheers!

Edited by faldo

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