xpathxpath xpath 介绍 xpath(xml, xpath) - 返回匹配XPath表达式的xml节点中的值的字符串数组。 Examples: > SELECT xpath('<a><b>b1</b><b>b2</b><b>b3</b><c>c1</c><c>c2</c></a>','a/b/text()'); ["b1","b2","b3"] Since: 2.0.0window_timexpath_boolean