Add man page for oracle compatibility functions

By Edmund

src/man/oracle_compat.3

+.\" This is -*-nroff-*-
+.\" XXX standard disclaimer belongs here....
+.\" $Id: oracle_compat.3,v 1.1 1997/03/07 00:47:41 scrappy Exp $
+.TH ORACLE_COMPAT SQL 03/06/97 PostgreSQL PostgreSQL
+.SH DESCRIPTION
+This is a set of single row character functions, defined for the datatype 
+text. They are supposed to behave exactly as their Oracle counterparts. 
+.PP
+The following functions have been implemented: 
+.PP
+.B LOWER(string)
+.IP
+Returns string, with all letters forced to lowercase.
+.PP
+.B UPPER(string)
+.IP
+Returns string, with all letters forced to uppercase.
+.PP
+.B INITCAP(string)
+.IP
+Returns string, with first letter of each word in uppercase,
+all other letters in lowercase. A word is delimited by white
+space.
+.PP
+.B LPAD(string1, len [,string2])
+.IP
+Returns string1, left-padded to length len with the sequence
+of characters in string2. string2 defaults to blanks.
+.PP
+.B RPAD(string1, len [,string2])
+.IP
+Returns string1, right-padded to length len with the sequence
+of characters in string2. string2 defaults to blanks.
+.PP
+.B LTRIM(string [,set])
+.IP
+Returns string with initial characters removed up to the first
+character not in set. set defaults to blanks.
+.PP
+.B RTRIM(string [,set])
+.IP
+Returns string with final characters removed after the last
+character not in set. set defaults to blanks.
+.PP
+.B SUBSTR(string, m [,n])
+.IP
+Returns a portion of string, beginning at character m, n
+characters long. If n is omitted, to the end of the string.
+The first position of string is 1.
+.PP
+.B TRANSLATE(string, from, to)
+.IP
+Returns string after replacing all occurences of from with
+the corresponding character in to. TRANSLATE will not remove
+characters.