LDAP_SEARCH_FILTER Function

The LDAP_SEARCH_FILTER function escapes reserved characters in an LDAP search filter, according to RFC 4515. The RFC describes *()\/ as reserved characters (see p_reserved_chars). These, non-printable characters (ASCII 0 - 31) and ones with a code > 127 (see p_escape_non_ascii) are escaped as \xx, where xx is the hexadecimal character code.

Syntax

APEX_ESCAPE.LDAP_SEARCH_FILTER (
    p_string              IN VARCHAR2,
    p_reserved_chars      IN VARCHAR2 DEFAULT c_ldap_search_reserved_chars,
    p_escape_non_ascii    IN BOOLEAN  DEFAULT TRUE )
RETURN VARCHAR2;

Parameters

Table 21-10 LDAP_SEARCH_FILTER Parameters

Parameter	Description
`p_string`	The text string that is escaped.
`p_reserved_chars`	A list of characters that when found in `p_string` is escaped with `\xx` where `xx` is the character's ASCII hexadecimal code.
`p_escape_non_ascii`	If TRUE, characters above ascii 127 in `p_string` are escaped with `\xx` where `xx` is the character's ASCII hexadecimal code. This is supported by RFCs 4514, but may cause errors with older LDAP servers and Microsoft AD.

Example

This example escapes the text in l_name and places the result in l_escaped.

DECLARE
l_name varchar2(4000) := 'Joe*User';
l_escaped varchar2(4000);
BEGIN
    l_escaped := apex_escape.ldap_search_filter(l_name);
    htp.p(l_name||' becomes '||l_escaped);
END;

Note:

LDAP_DN Function