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The first example demonstrated the LOWER function, which returned a character expression in lowercase. The second example demonstrated the UPPER function, which returned a character expression in uppercase. There isn t a built-in proper case function, so a user-defined function was created in this recipe instead. The first line of the CREATE FUNCTION definition defines the name and parameter expected in this case a varchar(max) data type parameter: CREATE FUNCTION udf_ProperCase(@UnCased varchar(max)) The RETURNS keyword defined what data type would be returned by the function after the logic has been applied: RETURNS varchar(max) AS BEGIN Next, the variable passed to the function was first modified to lowercase using the LOWER function: SET @UnCased = LOWER(@UnCased) A new integer local variable @C was set to the ASCII value of the letter a : DECLARE @C int SET @C = ASCII('a') A WHILE loop was initiated to go through every letter in the alphabet, and for each, search for a space preceding that letter, and then replace each occurrence of a letter preceded by a space with the uppercase version of the character: WHILE @C <= ASCII('z') BEGIN SET @UnCased = REPLACE( @UnCased, ' ' + CHAR(@C), ' ' + CHAR(@C-32)) SET @C = @C + 1 END The conversion to uppercase is performed by subtracting 32 from the ASCII integer value of the lowercase character. For example, the ASCII value for a lowercase a is 97, while the uppercase A is 65. SET @UnCased = CHAR(ASCII(LEFT(@UnCased, 1))-32) + RIGHT(@UnCased, LEN(@UnCased)-1) The final proper case string value of @UnCased is then returned from the function: RETURN @UnCased END GO

If you do not have root privileges on the system where you encounter this problem, you can follow the advice of the second suggestion in the message and add /usr/local/somelib to your LD_LIBRARY_PATH environment variable, as in the following example: $ export LD_LIBRARY_PATH=/usr/local/somelib:$LD_LIBRARY_PATH When building applications for your system, you should always check the build logs or output window for messages of the sort shown previously, and make sure that you ve added any new library locations to /etc/ldsoconf on systems where you have root privileges (this is the last suggestion in the bullet list in the message shown earlier in this section).

foreach $dir (sort(getdirectories($directory))){ # We want only the part of the directory after the path, as # using the rest on the URL would be an information leak $dir =~ s/$directory\///;

The LTRIM function removes leading blanks and the RTRIM function removes trailing blanks. This first example demonstrates removing leading blanks from a string: SELECT LTRIM(' This returns: String with leading blanks. This second example demonstrates removing trailing blanks from a string: SELECT RTRIM('"' + 'String with trailing blanks This returns: "String with trailing blanks" ') + '"' String with leading blanks.')

Both LTRIM and RTRIM take a single argument a character expression that trims the leading or trailing blanks. Note that there isn t a TRIM function (as seen in other programming languages) that can be used to remove both leading and trailing characters. To do this, you must use both LTRIM and RTRIM in the same expression.

You can test whether adding a specific directory to your library path will resolve shared library problems by manually executing a command such as the following, where /full/path/to/new/shared/library/dir is the full path to the directory containing the new shared library, and ProgramName is the name of your application: $ /lib/ldsoversion --library-path /full/path/to/new/shared/library/dir ProgramName You can then run this command multiple times, using the --verify and --list options to ensure that the right directories are being searched and that the right libraries are being found You can, of course, eliminate shared library problems in general by linking your application statically You can do this by adding the --static flag to the CFLAGS used during compilation (if you are building C applications), but this increases the size of your binary and eliminates both the application size and the library update advantages of using shared libraries..

The REPLICATE function repeats a given character expression a designated number of times. The syntax is: REPLICATE ( character_expression ,integer_expression ) The first argument is the character expression to be repeated. The second argument is the integer value of the number of times the character expression is to be repeated. This example demonstrates how to use the REPLICATE function to repeat a character expression a set number of times: SELECT REPLICATE ('Z', 30) This returns: ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ

Seeing a No such file or directory error when trying to execute a binary that you know is present (such as /bin/ls) can be maddening. This is an interesting twist on the foo: command not found error that you get when you try to execute a command that does not actually exist. Luckily, the cause and solution are usually quite simple this error indicates a problem with the shared library loader, usually /lib/ld-linux.so.X or /lib/ld.so.X. The most common cause of this problem is a bad symbolic link to the actual loader, which is usually the file /lib/ld-linux.X.Y.Z.so. This error often occurs due to a failed upgrade to a new version of Glibc or incorrectly configured

In this recipe s example, the letter Z in the character expression was repeated 30 times. Use REPLICATE to repeat values rather than having to code the characters manually. The maximum return value is 8,000 bytes.

symlinks in a root filesystem that you created. If the BusyBox binary (busybox) is present on the system where this error occurs, you can usually use BusyBox to resolve the problem as described in the section of 12 titled Using BusyBox to Resolve Upgrade Problems. If this error occurs in a root filesystem that you constructed on another system, you can correct the problem using that system s native utilities and then rebuild the root filesystem with the correct links.