Equivalent of JavaScript escape function in PLSQL

Question

Hi,
Is there any equivalent of JavaScript's "escape()" function in PlSql for web development? cos I found that whenever I have links generated in stored procedure with text that has space, single quote and so on will become invalid url syntax when user clicks on the hyperlink.
So I hope to convert the text to valid syntax while generating the link.
Please advise.
Thank you so much.

Answer 1

Hi,
CREATE OR REPLACE FUNCTION UNESCAPE_F
(P_TEXT IN VARCHAR2 := null) RETURN VARCHAR2 IS
V_HEX2 VARCHAR2(1);
V_CHAR VARCHAR2(1);
V_TEXT VARCHAR2(4000);
V_RETURN VARCHAR2(4000) := NULL;
V_HEX1 VARCHAR2(1);
BEGIN
IF p_text IS NULL THEN
v_return := NULL;
ELSE
v_text := p_text;
WHILE INSTR(v_text, '%') > 0 LOOP
v_return := v_return | | SUBSTR(v_text, 1, INSTR(v_text, '%') - 1);
v_text := SUBSTR(v_text, INSTR(v_text, '%') + 1);
v_hex1 := SUBSTR(v_text, 1, 1);
v_hex2 := SUBSTR(v_text, 2, 1);
v_text := SUBSTR(v_text, 3);
SELECT
CHR(
(DECODE(v_hex1,'0',0,'1',1,'2',2,'3',3,'4',4,'5',5,'6',6,'7',7,'8',8,'9',9,'A',10,'B',11,'C',12,'D',13,'E',14,'F',15,0) * 16) +
DECODE(v_hex2,'0',0,'1',1,'2',2,'3',3,'4',4,'5',5,'6',6,'7',7,'8',8,'9',9,'A',10,'B',11,'C',12,'D',13,'E',14,'F',15,0) )
INTO v_char
FROM dual;
v_return := v_return | | v_char;
END LOOP;
v_return := v_return | | v_text;
END IF;
RETURN(v_return);
END UNESCAPE_F;
Regards Michael