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https://wiki.postgresql.org/wiki/XML_Support
Aug 25, 2010 · These would serve as PostgreSQL input/output functions, with some syntax wrappers around it to support the standard syntax. An xml datum can contain one of two sorts of values: a document or a fragment. A document contains a header, a root element, and all the other things that make a well-formed XML document.
https://www.progress.com/xquery/resources
DataDirect XQuery® provides support for accessing the data contained in many popular relational databases, directly as XML using the SAP Sybase and PostgreSQL. A list of supported versions of various RDBMS is posted here, but check back often as we're adding more database support.
https://www.postgresql.org/message-id/4B7B269F.6090708%40dunslane.net
> Sounds like a great project. Please, let us know (zorba-users(at)lists(dot)sourceforge(dot)net) if you need any help or have questions with regard to plugging Zorba to PostGreSQL. We would love to see this happen and help. > > > Well, maybe you can answer the questions I had last time I looked at it, namely: > XQuery is a whole other question.
https://wiki.postgresql.org/wiki/PostgreSQL_vs_SQL/XML_Standards
SQL/XML support in PostgreSQL PostgreSQL’s SQL/XML support follows the first, 2003 edition of the standard, with a few extensions resembling, but not conformant with, the current versions.
https://www.w3resource.com/PostgreSQL/postgresql-xml-functions.php
Since PostgreSQL currently supports XPath(which is a subset of xQuery) only, despite SQL standards say that it must use XQuery, XPath is used. xml_is_well_formed() function
https://www.postgresql.org/docs/11/datatype-xml.html
The text-search functionality in PostgreSQL can also be used to speed up full-document searches of XML data. The necessary preprocessing support is, however, not yet available in the PostgreSQL …
https://www.postgresql.org/docs/8.2/datatype-xml.html
PostgreSQL has no internal support for such mapping, and relies on external tools to do such conversions. Missing Features Missing features include XQuery, SQL/XML syntax (ISO/IEC 9075-14), and an XML data type optimized for XML storage.
https://www.postgresql.org/message-id/4B7B8B69.9090801%40comcast.net
>>>> conclusin was it's impossible if we would like to use existing XQuery >>>> external modules (some are by license reasons and some are by >>>> techinical reasons). >>>> >>>> So it seems the only way to support XQuery is, developing our own >>>> XQuery functionality from scratch. I'm …
https://www.postgresql.org/docs/9.1/functions-xml.html
The BY REF clauses have no effect in PostgreSQL, but are allowed for SQL ... Also note that the SQL standard specifies the xmlexists construct to take an XQuery expression as ... This function is equivalent to the standard XMLEXISTS predicate, except that it also offers support for a namespace mapping ...
https://stackoverflow.com/questions/17799790/using-xpath-to-extract-data-from-an-xml-column-in-postgres
Using xpath to extract data from an XML column in postgres. Ask Question Asked 6 years, 2 months ago. Active 12 days ago. Viewed 26k times 5. 2. I've made the following table: ... Postgresql: Using xpath to extract data from an XML column. 1. Extract xpath in postgres. 1. Extracting XML document. 1.
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