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<div> <a href="fn_xml_uri_get.html">xml_uri_get</a> </div> <div> <a href="fn_xml_validate_dtd.html">xml_validate_dtd</a> </div> <div> <a href="fn_xml_validate_schema.html">xml_validate_schema</a> </div> <div> <a href="fn_xml_view_dtd.html">xml_view_dtd</a> </div> <div> <a href="fn_xml_view_schema.html">xml_view_schema</a> </div> <div> <a href="fn_xmlsql_update.html">xmlsql_update</a> </div> <div> <a href="fn_xpath_eval.html">xpath_eval</a> </div> <div> <a href="fn_xper_cut.html">xper_cut</a> </div> <div> <a href="fn_xper_doc.html">xper_doc</a> </div> <div> <a href="fn_xper_locate_words.html">xper_locate_words</a> </div> <div> <a href="fn_xpf_extension.html">xpf_extension</a> </div> <div> <a href="fn_xpf_extension_remove.html">xpf_extension_remove</a> </div> <div> <a href="fn_xquery_eval.html">xquery_eval</a> </div> <div> <a href="fn_xslt.html">xslt</a> </div> <div> <a href="fn_xslt_format_number.html">xslt_format_number</a> </div> <div> <a href="fn_xslt_sheet.html">xslt_sheet</a> </div> <div> <a href="fn_xslt_stale.html">xslt_stale</a> </div> <div> <a href="fn_xte_head.html">xte_head</a> </div> <div> <a href="fn_xte_node.html">xte_node</a> </div> <div> <a href="fn_xte_node_from_nodebld.html">xte_node_from_nodebl...</a> </div> <div> <a href="fn_xte_nodebld_acc.html">xte_nodebld_acc</a> </div> <div> <a href="fn_xte_nodebld_final.html">xte_nodebld_final</a> </div> <div> <a href="fn_xte_nodebld_init.html">xte_nodebld_init</a> </div> <div> <a href="fn_xtree_doc.html">xtree_doc</a> </div> </div> <div> <a href="functions.html#XPATH">XPATH & XQUERY</a> </div> <br /> <div> <a href="functionidx.html">Functions Index</a> </div> <br /> </div> <div id="text"> <h2>XMLType.existsNode</h2> <div class="refpurpose">Tests node existence having evaluated given XPATH expression.</div> <div class="funcsynopsis"> <span class="funcdef"> <span class="function">XMLType.existsNode</span> </span> (<span class="paramdef">in <span class="parameter">xpath_expn</span> varchar</span>, <span class="paramdefoptional">[in <span class="optional">namespace_map</span> varchar]</span>); </div> <div class="refsect1"> <div class="refsect1title">Description</div> <p>The member function calculates the given XPATH expression <span class="computeroutput">xpath_expn</span> using the XML entity of the instance as a context node. If a <span class="computeroutput">namespace_map</span> parameter is given then the function adds namespace declarations from this parameter into the beginning of <span class="computeroutput">xpath_expn</span> before the evaluation. The function returns 1 if the first result of XPATH evaluation is a node or 0 if there are no results or if the first result is not a node. </p> </div> <div class="refsect1"> <div class="refsect1title">Parameters</div> <div class="refsect2"> <span class="refsect2title">xpath_expn – </span> A text of XPATH expression to evaluate. </div> <div class="refsect2"> <span class="refsect2title">namespace_map – </span> A string that is a list of namespace prefix declarations delimited by whitespace characters. If the <span class="computeroutput">xpath_expn</span> expression also contains a list of declarations then these two lists are concatenated. </div> </div> <div class="refsect1"> <div class="refsect1title">Return Types</div> <p>The function returns integer 1 or 0</p> </div> <div class="refsect1"> <div class="refsect1title">Examples</div> <a name="ex_XMLType.existsNode" /> <div class="example"> <div class="exampletitle">A table with an XMLType column</div> <p>This populates a table with XML data and then reports which rows contain 'empno' element inside 'emp'.</p> <div> <pre class="screen"> create table TEST_XMLS (I integer primary key, XMLVAL XMLType); insert into TEST_XMLS values (1, XMLType('<emp><empno>221</empno><ename>John</ename></emp>')); insert into TEST_XMLS values (2, XMLType('<po><pono>331</pono><poname>PO_1</poname></po>')); insert into TEST_XMLS values (3, XMLType('<oil-rig id="14a" water="0.413"/><oil-rig id="14b" water="0.402"/>')); select e.I, e.XMLVAL.existsNode('/emp/empno') from TEST_XMLS as e I callret INTEGER NOT NULL INTEGER _______________________________________________________________________________ 1 1 2 0 3 0 3 Rows. -- 00000 msec. </pre> </div> </div> </div> <div class="refsect1"> <div class="refsect1title">See Also</div> <p> <a href="fn_XMLType.extract.html">XMLType.extract()</a> </p> </div> </div> <div id="footer"> <div>Copyright© 1999 - 2009 OpenLink Software All rights reserved.</div> <div id="validation"> <a href="http://validator.w3.org/check/referer"> <img src="http://www.w3.org/Icons/valid-xhtml10" alt="Valid XHTML 1.0!" height="31" width="88" /> </a> <a href="http://jigsaw.w3.org/css-validator/"> <img src="http://jigsaw.w3.org/css-validator/images/vcss" alt="Valid CSS!" height="31" width="88" /> </a> </div> </div> </body> </html>