XT_REGEXP is the Oracle DB package for extended regular expressions and string functions

Function list:

function split_simple(p_str in varchar2,p_delim in varchar2)
	return varchar2_table pipelined;

Simple split string by delimiter as substring without regular expression.

function split(pStr varchar2,pDelimRegexp varchar2,pMaxCount number default 0)
	return varchar2_table;

Function splits string by substrings matched for regular explression.

Example:

select * from table(
	xt_regexp.split('Please, make me happy!','(?<=,)\s')
	);

Another example:

select * from table(
	xt_regexp.split('Please, make me happy!','\s',3)
	);




function matches(pStr varchar2,pPattern varchar2,
	pCANON_EQ number default 0,
	pCASE_INSENSITIVE number default 0,
	pCOMMENTS         number default 0,
	pDOTALL          number default 0,
	pMULTILINE        number default 0,
	pUNICODE_CAS     number default 0,
	pUNIX_LINES      number default 0
)
return boolean;

Function return true, if input string matches regular explression. First parameter-string for testing, second - regular expression, others - modifiers for regular expression:

• CANON_EQ - canonical equal;
• CASE_INSENSITIVE - case insensitive;
• COMMENTS - ignore comments starts with #;
• DOTALL - dot symbol in regexp includes string delimiter(/n,/r/n) (default-not);
• LITERAL - template is not regular expression;
• MULTILINE - multiline mode;
• UNICODE_CASE - case for unicode;
• UNIX_LINES - string deliniter is /n

---

function get_matches(
	pStr varchar2,
	pPattern varchar2,
	pGroup number default 0,
	pMaxCount number default 0,
		pCANON_EQ number default 0,
		pCASE_INSENSITIVE number default 0,
		pCOMMENTS         number default 0,
		pDOTALL          number default 0,
		pMULTILINE        number default 0,
		pUNICODE_CAS     number default 0,
		pUNIX_LINES      number default 0)
	return varchar2_table;

Function returns collection of matched group strings. Params like previous function, excepts pMaxCount - max count strings, if not set or equal 0 returns all.

Example:

select * 
from 
	table(
		xt_regexp.get_matches('Please, make me happy!','\S*m\S*')
	);




function join_matches(pStr varchar2,pPattern varchar2,pGroup number default 0,pDelim varchar2 default ';',
		pCANON_EQ number default 0,
		pCASE_INSENSITIVE number default 0,
		pCOMMENTS         number default 0,
		pDOTALL          number default 0,
		pMULTILINE        number default 0,
		pUNICODE_CAS     number default 0,
		pUNIX_LINES      number default 0)
	return varchar2;

Function like get_matches, but returns joined collection with delimiter.

function replace_all(pStr varchar2,pPattern varchar2,pReplacement varchar2)
	return varchar2

Function replaces matched substring with third param.

Example - add "Scott!!!!" after comma with "Please":

select xt_regexp.replace_all('Please, make me happy!','(?<=Please)(,)','$1 Scott!!!!') from dual;

Result: Please, Scott!!!! make me happy!**

function replace_first(pStr varchar2,pPattern varchar2,pReplacement varchar2)
	return varchar2

Function line previous but replaces just first occurence.