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Bug#26518 XPath and variables problem

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Problem: XPath variables didn't work.
Fix: adding variables support,
both user-defined and sp local variables are now supported by XPath.
This commit is contained in:
bar@mysql.com/bar.myoffice.izhnet.ru
2007-05-08 13:32:29 +05:00
parent 68cc7dde31
commit 8bc4ded6aa
3 changed files with 253 additions and 9 deletions
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72
mysql-test/t/xml.test
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@@ -444,3 +444,75 @@ select ExtractValue('<a><parent>test</parent></a>', '/a/parent');
select ExtractValue('<a><preceding>test</preceding></a>', '/a/preceding');
select ExtractValue('<a><preceding-sibling>test</preceding-sibling></a>', '/a/preceding-sibling');
select ExtractValue('<a><self>test</self></a>', '/a/self');
#
# Bug#26518 XPath and variables problem
# Check with user defined variables
#
set @i=1;
select ExtractValue('<a><b>b1</b><b>b2</b></a>','/a/b[$@i]');
set @i=2;
select ExtractValue('<a><b>b1</b><b>b2</b></a>','/a/b[$@i]');
set @i=NULL;
select ExtractValue('<a><b>b1</b><b>b2</b></a>','/a/b[$@i]');
#
# Check variables in a stored procedure - both local and user variables
# Make sure that SP and local variables with the same name work together.
#
DELIMITER |;
CREATE PROCEDURE spxml(xml VARCHAR(128))
BEGIN
DECLARE c INT;
DECLARE i INT DEFAULT 1;
SET c= ExtractValue(xml,'count(/a/b)');
SET @i= c;
WHILE i <= c DO
BEGIN
SELECT i, @i, ExtractValue(xml,'/a/b[$i]'), ExtractValue(xml,'/a/b[$@i]');
SET i= i + 1;
SET @i= @i - 1;
END;
END WHILE;
END|
DELIMITER ;|
call spxml('<a><b>b1</b><b>b2</b><b>b3</b></a>');
drop procedure spxml;
#
# Additional tests for bug#26518
--echo Multiple matches, but no index specification
SELECT ExtractValue('<a><b>b1</b><b>b2</b></a>','/a/b');
--echo No matches
SELECT ExtractValue('<a><b>b1</b><b>b2</b></a>','/a/c');
--echo Index out of range
SELECT ExtractValue('<a><b>b1</b><b>b2</b></a>','/a/b[-1]');
SELECT ExtractValue('<a><b>b1</b><b>b2</b></a>','/a/b[10]');
--echo With string-to-number conversion
SELECT ExtractValue('<a><b>b1</b><b>b2</b></a>','/a/b["1"]');
SELECT ExtractValue('<a><b>b1</b><b>b2</b></a>','/a/b["1 and string"]');
SELECT ExtractValue('<a><b>b1</b><b>b2</b></a>','/a/b["string and 1"]');
SELECT ExtractValue('<a><b>b1</b><b>b2</b></a>','/a/b["string"]');
--echo String-to-number conversion from a user variable
SET @i='1';
SELECT ExtractValue('<a><b>b1</b><b>b2</b></a>','/a/b[$@i]');
SET @i='1 and string';
SELECT ExtractValue('<a><b>b1</b><b>b2</b></a>','/a/b[$@i]');
SET @i='string and 1';
SELECT ExtractValue('<a><b>b1</b><b>b2</b></a>','/a/b[$@i]');
SET @i='string';
SELECT ExtractValue('<a><b>b1</b><b>b2</b></a>','/a/b[$@i]');
--echo String-to-number conversion with a CHAR SP variable
DELIMITER |;
CREATE PROCEDURE spxml(xml VARCHAR(128), i CHAR(16))
BEGIN
SELECT ExtractValue(xml,'/a/b[$i]');
END|
DELIMITER ;|
CALL spxml('<a><b>b1</b><b>b2</b></a>', '1');
CALL spxml('<a><b>b1</b><b>b2</b></a>', '1 and string');
CALL spxml('<a><b>b1</b><b>b2</b></a>', 'string and 1');
CALL spxml('<a><b>b1</b><b>b2</b></a>', 'string');
DROP PROCEDURE spxml;