Difference between revisions of "XQUERY NODE()"
Yvonne.milne (Talk | contribs) |
Yvonne.milne (Talk | contribs) |
||
| Line 11: | Line 11: | ||
The XQUERY_NODE() function is used to search for an XML node in an XML file previously opened with XQUERY_OPEN() and return its value. The character expression <expC1> is the XML node. XQUERY_NODE() is a synonym of the XQUERY_FIND() function. | The XQUERY_NODE() function is used to search for an XML node in an XML file previously opened with XQUERY_OPEN() and return its value. The character expression <expC1> is the XML node. XQUERY_NODE() is a synonym of the XQUERY_FIND() function. | ||
| − | + | XQuery functions: | |
| − | The XQUERY_OPEN() function is used to open an XML file for parsing using XQuery notation. After opening using XQUERY_OPEN(), the XQUERY_NODE() | + | The XQUERY_OPEN() function is used to open an XML file for parsing using XQuery notation. After opening using XQUERY_OPEN(), the XQUERY_FIND() or XQUERY_NODE() functions can be used to find and return a specified XML node value. The XQUERY_ATTRIBUTES() function finds and returns a complete node and its attributes. XQUERY_COUNT() returns a count of a specified XML node. The XQUERY_SELECT() function provides the ability to query nodes by attribute and value. The XQUERY_CLOSE() function is closes the XML file. |
The XQUERY() function is used to parse XML strings using XQuery notation. | The XQUERY() function is used to parse XML strings using XQuery notation. | ||
Revision as of 07:32, 29 February 2016
Contents
Purpose
Used to search for an XML node in an XML file previously opened with XQUERY_OPEN() and return its value
Syntax
XQUERY_NODE(<expC1>)
See Also
MQCLOSE(), MQCREATE(), MQCURMSGS(), MQOPEN(), MQSEND(), MQRECEIVE(), MQUNLINK(), XML_DECODE(), XML_ENCODE(), XML_GATHER(), XML_SCATTER(), XQUERY(), XQUERY_ATTRIBUTES(), XQUERY_CLOSE(), XQUERY_COUNT(), XQUERY_DECODE(), XQUERY_FILE(), XQUERY_FIND(), XQUERY_OPEN(), XQUERY_SELECT()
Description
The XQUERY_NODE() function is used to search for an XML node in an XML file previously opened with XQUERY_OPEN() and return its value. The character expression <expC1> is the XML node. XQUERY_NODE() is a synonym of the XQUERY_FIND() function.
XQuery functions:
The XQUERY_OPEN() function is used to open an XML file for parsing using XQuery notation. After opening using XQUERY_OPEN(), the XQUERY_FIND() or XQUERY_NODE() functions can be used to find and return a specified XML node value. The XQUERY_ATTRIBUTES() function finds and returns a complete node and its attributes. XQUERY_COUNT() returns a count of a specified XML node. The XQUERY_SELECT() function provides the ability to query nodes by attribute and value. The XQUERY_CLOSE() function is closes the XML file.
The XQUERY() function is used to parse XML strings using XQuery notation.
The XQUERY_FILE() function is used to parse XML files using XQuery notation.
The XQUERY_DECODE() function is used to return an object from an XML string.
Example
mybooks.xml
<?xml version="1.0" encoding="UTF-8"?> <bookstore> <book category="COOKING"> <title lang="en">Pulse</title> <author>Jenny Chandler</author> <year>2013</year> <format>Hardback</format> </book> <book category="COOKING"> <title lang="en">Riverford Farm Cook Book</title> <author>Guy Watson</author> <author>Jane Baxter</author> <year>2008</year> <format>Paperback</format> </book> <book category="CHILDREN"> <title lang="en">The House At Pooh Corner</title> <author>A. A. Milne</author> <year>1928</year> <format>Hardback</format> </book> <book category="CRIME"> <title lang="en">Knots and Crosses</title> <author>Ian Rankin</author> <year>2008</year> <format>EPUB</format> </book> <book category="PHILOSOPHY"> <title lang="fr">Le mythe de Sisyphe</title> <author>Albert Camus</author> <year>1943</year> <format>Paperback</format> </book> </bookstore>
// Examples using mybooks.xml xquery_open("mybooks.xml") nCount = xquery_count("/bookstore/book") for i=1 to nCount cTitle = xquery_node("/bookstore/book[&i]/title") ? cTitle endfor xquery_close() Pulse Riverford Farm Cook Book The House At Pooh Corner Knots and Crosses Le mythe de Sisyphe xquery_open("mybooks.xml") nCount = xquery_count("/bookstore/book") for i=1 to nCount nCountAuthor = xquery_count("/bookstore/book[&i]/author") for j = 1 to nCountAuthor cAuthor = xquery_node("/bookstore/book[&i]/author[&j]") ? cAuthor endfor endfor xquery_close() Jenny Chandler Guy Watson Jane Baxter A. A. Milne Ian Rankin Albert Camus
