Functions for mapping table data and table schemas to XML (a.k.a. XML export)
This commit is contained in:
Peter Eisentraut
parent
bb0a8a3ad4
commit
355e05ab41
@ -1,4 +1,4 @@
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<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.360 2007/02/16 03:50:29 momjian Exp $ -->
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<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.361 2007/02/16 07:46:54 petere Exp $ -->
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<chapter id="functions">
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<title>Functions and Operators</title>
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@ -11156,6 +11156,193 @@ SELECT xmlroot(xmlparse(document '<?xml version="1.1"?><content>abc</content>'),
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</sect3>
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</sect2>
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<sect2>
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<title>Mapping Tables to XML</title>
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<para>
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The following functions map the contents of relational tables to
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XML values. They can be thought of as XML export functionality.
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<synopsis>
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table_to_xml(tbl regclass, nulls boolean, tableforest boolean, targetns text)
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query_to_xml(query text, nulls boolean, tableforest boolean, targetns text)
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cursor_to_xml(cursor refcursor, count int, nulls boolean, tableforest boolean, targetns text)
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</synopsis>
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The return type of each function is <type>xml</type>.
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</para>
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<para>
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<function>table_to_xml</function> maps the content of the named
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table, passed as parameter <parameter>tbl</parameter>. The
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<type>regclass</type> accepts strings identifying tables using the
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usual notation, including optional schema qualifications and
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double quotes. <function>query_to_xml</function> executes the
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query whose text is passed as parameter
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<parameter>query</parameter> and maps the result set.
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<function>cursor_to_xml</function> fetches the indicated number of
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rows from the cursor specificed by the parameter
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<parameter>cursor</parameter>. This variant is recommendable if
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large tables have to be mapped, because the result value is built
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up in memory by each function.
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</para>
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<para>
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If <parameter>tableforest</parameter> is false, then the resulting
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XML document looks like this:
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<screen><![CDATA[
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<tablename>
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<row>
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<columnname1>data</columnname1>
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<columnname2>data</columnname2>
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</row>
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<row>
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...
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</row>
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...
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</tablename>
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]]></screen>
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If <parameter>tableforest</parameter> is true, the result is an
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XML content fragment that looks like this:
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<screen><![CDATA[
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<tablename>
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<columnname1>data</columnname1>
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<columnname2>data</columnname2>
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</tablename>
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<tablename>
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...
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</tablename>
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...
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]]></screen>
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If no table name is avaible, that is, when mapping a query or a
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cursor, the string <literal>table</literal> is used in the first
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format, <literal>row</literal> in the second format.
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</para>
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<para>
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The choice between these formats is up to the user. The first
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format is a proper XML document, which will be important in many
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applications. The second format tends to be more useful in the
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<function>cursor_to_xml</function> function if the result values are to be
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reassembled into one document later on. The functions for
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producing XML content discussed above, in particular
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<function>xmlelement</function>, can be used to alter the results
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to taste.
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</para>
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<para>
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The data values are mapping in the same way as described for the
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function <function>xmlelement</function> above.
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</para>
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<para>
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The parameter <parameter>nulls</parameter> determines whether null
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values should be included in the output. If true, null values in
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columns are represented as
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<screen><![CDATA[
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<columname xsi:nil="true"/>
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]]></screen>
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where <literal>xsi</literal> is the XML namespace prefix for XML
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Schema Instance. An appropriate namespace declaration will be
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added to the result value. If false, columns containing null
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values are simply omitted from the output.
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</para>
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<para>
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The parameter <parameter>targetns</parameter> specifies the
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desired XML namespace of the result. If no particular namespace
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is wanted, an empty string should be passed.
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</para>
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<para>
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The following functions return XML Schema documents describing the
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mappings made by the data mappings produced by the corresponding
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functions above.
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<synopsis>
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table_to_xmlschema(tbl regclass, nulls boolean, tableforest boolean, targetns text)
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query_to_xmlschema(query text, nulls boolean, tableforest boolean, targetns text)
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cursor_to_xmlschema(cursor refcursor, nulls boolean, tableforest boolean, targetns text)
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</synopsis>
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It is essential that the same parameters are passed in order to
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obtain matching XML data mappings and XML Schema documents.
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</para>
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<para>
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The following functions produce XML data mappings and the
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corresponding XML Schema in one document (or forest), linked
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together. They can be useful where self-contained and
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self-describing results are wanted.
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<synopsis>
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table_to_xml_and_xmlschema(tbl regclass, nulls boolean, tableforest boolean, targetns text)
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query_to_xml_and_xmlschema(query text, nulls boolean, tableforest boolean, targetns text)
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</synopsis>
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</para>
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<para>
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As an example for using the output produced by these functions,
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<xref linkend="xslt-xml-html"> shows an XSLT stylesheet that
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converts the output of
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<function>table_to_xml_and_xmlschema</function> to an HTML
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document containing a tabular rendition of the table data. In a
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similar manner, the result data of these functions can be
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converted into other XML-based formats.
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</para>
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<figure id="xslt-xml-html">
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<title>XSLT stylesheet for converting SQL/XML output to HTML</title>
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<programlisting><![CDATA[
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<?xml version="1.0"?>
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<xsl:stylesheet version="1.0"
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xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
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xmlns:xsd="http://www.w3.org/2001/XMLSchema"
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xmlns="http://www.w3.org/1999/xhtml"
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>
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<xsl:output method="xml"
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doctype-system="http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"
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doctype-public="-//W3C/DTD XHTML 1.0 Strict//EN"
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indent="yes"/>
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<xsl:template match="/*">
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<xsl:variable name="schema" select="//xsd:schema"/>
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<xsl:variable name="tabletypename"
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select="$schema/xsd:element[@name=name(current())]/@type"/>
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<xsl:variable name="rowtypename"
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select="$schema/xsd:complexType[@name=$tabletypename]/xsd:sequence/xsd:element[@name='row']/@type"/>
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<html>
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<head>
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<title><xsl:value-of select="name(current())"/></title>
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</head>
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<body>
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<table>
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<tr>
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<xsl:for-each select="$schema/xsd:complexType[@name=$rowtypename]/xsd:sequence/xsd:element/@name">
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<th><xsl:value-of select="."/></th>
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</xsl:for-each>
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</tr>
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<xsl:for-each select="row">
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<tr>
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<xsl:for-each select="*">
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<td><xsl:value-of select="."/></td>
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</xsl:for-each>
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</tr>
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</xsl:for-each>
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</table>
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</body>
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</html>
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</xsl:template>
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</xsl:stylesheet>
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]]></programlisting>
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</figure>
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</sect2>
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<sect2>
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<title>Processing XML</title>
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@ -11171,21 +11358,6 @@ SELECT xmlroot(xmlparse(document '<?xml version="1.1"?><content>abc</content>'),
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</para>
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<variablelist>
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<varlistentry>
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<term>Import/Export</term>
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<listitem>
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<para>
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There is no facility for mapping <acronym>XML</> to relational
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tables. An external tool must be used for this. One simple way
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to export <acronym>XML</> is to use <application>psql</> in
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<acronym>HTML</> mode (<literal>\pset format html</>), and
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convert the <acronym>XHTML</> output to XML using an external
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tool.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>Indexing</term>
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<listitem>
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@ -7,7 +7,7 @@
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* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $PostgreSQL: pgsql/src/backend/utils/adt/xml.c,v 1.28 2007/02/13 15:56:12 mha Exp $
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* $PostgreSQL: pgsql/src/backend/utils/adt/xml.c,v 1.29 2007/02/16 07:46:54 petere Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -49,11 +49,16 @@
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#include <libxml/xmlwriter.h>
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#endif /* USE_LIBXML */
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#include "catalog/namespace.h"
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#include "catalog/pg_type.h"
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#include "commands/dbcommands.h"
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#include "executor/executor.h"
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#include "executor/spi.h"
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#include "fmgr.h"
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#include "lib/stringinfo.h"
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#include "libpq/pqformat.h"
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#include "mb/pg_wchar.h"
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#include "miscadmin.h"
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#include "nodes/execnodes.h"
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#include "parser/parse_expr.h"
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#include "utils/array.h"
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@ -84,6 +89,14 @@ static xmlDocPtr xml_parse(text *data, XmlOptionType xmloption_arg, bool preserv
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#endif /* USE_LIBXML */
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static StringInfo query_to_xml_internal(const char *query, char *tablename, const char *xmlschema, bool nulls, bool tableforest, const char *targetns);
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static const char * map_sql_table_to_xmlschema(TupleDesc tupdesc, Oid relid, bool nulls, bool tableforest, const char *targetns);
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static const char * map_sql_type_to_xml_name(Oid typeoid, int typmod);
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static const char * map_sql_typecoll_to_xmlschema_types(TupleDesc tupdesc);
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static const char * map_sql_type_to_xmlschema_type(Oid typeoid, int typmod);
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static void SPI_sql_row_to_xmlelement(int rownum, StringInfo result, char *tablename, bool nulls, bool tableforest, const char *targetns);
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XmlBinaryType xmlbinary;
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XmlOptionType xmloption;
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@ -94,6 +107,16 @@ XmlOptionType xmloption;
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errmsg("no XML support in this installation")))
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#define _textin(str) DirectFunctionCall1(textin, CStringGetDatum(str))
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#define _textout(x) DatumGetCString(DirectFunctionCall1(textout, PointerGetDatum(x)))
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/* from SQL/XML:2003 section 4.7 */
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#define NAMESPACE_XSD "http://www.w3.org/2001/XMLSchema"
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#define NAMESPACE_XSI "http://www.w3.org/2001/XMLSchema-instance"
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#define NAMESPACE_SQLXML "http://standards.iso.org/iso/9075/2003/sqlxml"
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Datum
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xml_in(PG_FUNCTION_ARGS)
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{
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@ -259,6 +282,7 @@ appendStringInfoText(StringInfo str, const text *t)
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{
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appendBinaryStringInfo(str, VARDATA(t), VARSIZE(t) - VARHDRSZ);
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}
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#endif
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static xmltype *
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@ -276,7 +300,6 @@ stringinfo_to_xmltype(StringInfo buf)
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}
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#ifdef NOT_USED
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static xmltype *
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cstring_to_xmltype(const char *string)
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{
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@ -290,9 +313,9 @@ cstring_to_xmltype(const char *string)
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return result;
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}
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#endif
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#ifdef USE_LIBXML
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static xmltype *
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xmlBuffer_to_xmltype(xmlBufferPtr buf)
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{
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@ -1551,3 +1574,762 @@ map_sql_value_to_xml_value(Datum value, Oid type)
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return buf.data;
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}
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static char *
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_SPI_strdup(const char *s)
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{
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char *ret = SPI_palloc(strlen(s) + 1);
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strcpy(ret, s);
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return ret;
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}
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/*
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* Map SQL table to XML and/or XML Schema document; see SQL/XML:2003
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* section 9.3.
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*/
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Datum
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table_to_xml(PG_FUNCTION_ARGS)
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{
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Oid relid = PG_GETARG_OID(0);
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bool nulls = PG_GETARG_BOOL(1);
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bool tableforest = PG_GETARG_BOOL(2);
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const char *targetns = _textout(PG_GETARG_TEXT_P(3));
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StringInfoData query;
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initStringInfo(&query);
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appendStringInfo(&query, "SELECT * FROM %s", DatumGetCString(DirectFunctionCall1(regclassout, ObjectIdGetDatum(relid))));
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PG_RETURN_XML_P(stringinfo_to_xmltype(query_to_xml_internal(query.data, get_rel_name(relid), NULL, nulls, tableforest, targetns)));
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}
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Datum
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query_to_xml(PG_FUNCTION_ARGS)
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{
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char *query = _textout(PG_GETARG_TEXT_P(0));
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bool nulls = PG_GETARG_BOOL(1);
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bool tableforest = PG_GETARG_BOOL(2);
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const char *targetns = _textout(PG_GETARG_TEXT_P(3));
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PG_RETURN_XML_P(stringinfo_to_xmltype(query_to_xml_internal(query, NULL, NULL, nulls, tableforest, targetns)));
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}
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Datum
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cursor_to_xml(PG_FUNCTION_ARGS)
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{
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char *name = _textout(PG_GETARG_TEXT_P(0));
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int32 count = PG_GETARG_INT32(1);
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bool nulls = PG_GETARG_BOOL(2);
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bool tableforest = PG_GETARG_BOOL(3);
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const char *targetns = _textout(PG_GETARG_TEXT_P(4));
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StringInfoData result;
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Portal portal;
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int i;
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initStringInfo(&result);
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SPI_connect();
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portal = SPI_cursor_find(name);
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if (portal == NULL)
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ereport(ERROR,
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(errcode(ERRCODE_UNDEFINED_CURSOR),
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errmsg("cursor \"%s\" does not exist", name)));
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SPI_cursor_fetch(portal, true, count);
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for (i = 0; i < SPI_processed; i++)
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SPI_sql_row_to_xmlelement(i, &result, NULL, nulls, tableforest, targetns);
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SPI_finish();
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PG_RETURN_XML_P(stringinfo_to_xmltype(&result));
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}
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static StringInfo
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query_to_xml_internal(const char *query, char *tablename, const char *xmlschema, bool nulls, bool tableforest, const char *targetns)
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{
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StringInfo result;
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char *xmltn;
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int i;
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if (tablename)
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xmltn = map_sql_identifier_to_xml_name(tablename, true, false);
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else
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xmltn = "table";
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result = makeStringInfo();
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SPI_connect();
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if (SPI_execute(query, true, 0) != SPI_OK_SELECT)
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ereport(ERROR,
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(errcode(ERRCODE_DATA_EXCEPTION),
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errmsg("invalid query")));
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if (!tableforest)
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{
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appendStringInfo(result, "<%s xmlns:xsi=\"" NAMESPACE_XSI "\"", xmltn);
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if (strlen(targetns) > 0)
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appendStringInfo(result, " xmlns=\"%s\"", targetns);
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if (strlen(targetns) > 0)
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appendStringInfo(result, " xmlns:xsd=\"%s\"", targetns);
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if (xmlschema)
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{
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if (strlen(targetns) > 0)
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appendStringInfo(result, " xsi:schemaLocation=\"%s #\"", targetns);
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else
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appendStringInfo(result, " xsi:noNamespaceSchemaLocation=\"#\"");
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}
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appendStringInfo(result, ">\n\n");
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}
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if (xmlschema)
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appendStringInfo(result, "%s\n\n", xmlschema);
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for(i = 0; i < SPI_processed; i++)
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SPI_sql_row_to_xmlelement(i, result, tablename, nulls, tableforest, targetns);
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if (!tableforest)
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appendStringInfo(result, "</%s>\n", xmltn);
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SPI_finish();
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return result;
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}
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Datum
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table_to_xmlschema(PG_FUNCTION_ARGS)
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{
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Oid relid = PG_GETARG_OID(0);
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bool nulls = PG_GETARG_BOOL(1);
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bool tableforest = PG_GETARG_BOOL(2);
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const char *targetns = _textout(PG_GETARG_TEXT_P(3));
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const char *result;
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Relation rel;
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rel = heap_open(relid, AccessShareLock);
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result = map_sql_table_to_xmlschema(rel->rd_att, relid, nulls, tableforest, targetns);
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heap_close(rel, NoLock);
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PG_RETURN_XML_P(cstring_to_xmltype(result));
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}
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Datum
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query_to_xmlschema(PG_FUNCTION_ARGS)
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{
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char *query = _textout(PG_GETARG_TEXT_P(0));
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bool nulls = PG_GETARG_BOOL(1);
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bool tableforest = PG_GETARG_BOOL(2);
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const char *targetns = _textout(PG_GETARG_TEXT_P(3));
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const char *result;
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void *plan;
|
||||
Portal portal;
|
||||
|
||||
SPI_connect();
|
||||
plan = SPI_prepare(query, 0, NULL);
|
||||
portal = SPI_cursor_open(NULL, plan, NULL, NULL, true);
|
||||
result = _SPI_strdup(map_sql_table_to_xmlschema(portal->tupDesc, InvalidOid, nulls, tableforest, targetns));
|
||||
SPI_cursor_close(portal);
|
||||
SPI_finish();
|
||||
|
||||
PG_RETURN_XML_P(cstring_to_xmltype(result));
|
||||
}
|
||||
|
||||
|
||||
Datum
|
||||
cursor_to_xmlschema(PG_FUNCTION_ARGS)
|
||||
{
|
||||
char *name = _textout(PG_GETARG_TEXT_P(0));
|
||||
bool nulls = PG_GETARG_BOOL(1);
|
||||
bool tableforest = PG_GETARG_BOOL(2);
|
||||
const char *targetns = _textout(PG_GETARG_TEXT_P(3));
|
||||
|
||||
const char *xmlschema;
|
||||
Portal portal;
|
||||
|
||||
SPI_connect();
|
||||
portal = SPI_cursor_find(name);
|
||||
if (portal == NULL)
|
||||
ereport(ERROR,
|
||||
(errcode(ERRCODE_UNDEFINED_CURSOR),
|
||||
errmsg("cursor \"%s\" does not exist", name)));
|
||||
|
||||
xmlschema = _SPI_strdup(map_sql_table_to_xmlschema(portal->tupDesc, InvalidOid, nulls, tableforest, targetns));
|
||||
SPI_finish();
|
||||
|
||||
PG_RETURN_XML_P(cstring_to_xmltype(xmlschema));
|
||||
}
|
||||
|
||||
|
||||
Datum
|
||||
table_to_xml_and_xmlschema(PG_FUNCTION_ARGS)
|
||||
{
|
||||
Oid relid = PG_GETARG_OID(0);
|
||||
bool nulls = PG_GETARG_BOOL(1);
|
||||
bool tableforest = PG_GETARG_BOOL(2);
|
||||
const char *targetns = _textout(PG_GETARG_TEXT_P(3));
|
||||
|
||||
StringInfoData query;
|
||||
Relation rel;
|
||||
const char *xmlschema;
|
||||
|
||||
rel = heap_open(relid, AccessShareLock);
|
||||
xmlschema = map_sql_table_to_xmlschema(rel->rd_att, relid, nulls, tableforest, targetns);
|
||||
heap_close(rel, NoLock);
|
||||
|
||||
initStringInfo(&query);
|
||||
appendStringInfo(&query, "SELECT * FROM %s", DatumGetCString(DirectFunctionCall1(regclassout, ObjectIdGetDatum(relid))));
|
||||
|
||||
PG_RETURN_XML_P(stringinfo_to_xmltype(query_to_xml_internal(query.data, get_rel_name(relid), xmlschema, nulls, tableforest, targetns)));
|
||||
}
|
||||
|
||||
|
||||
Datum
|
||||
query_to_xml_and_xmlschema(PG_FUNCTION_ARGS)
|
||||
{
|
||||
char *query = _textout(PG_GETARG_TEXT_P(0));
|
||||
bool nulls = PG_GETARG_BOOL(1);
|
||||
bool tableforest = PG_GETARG_BOOL(2);
|
||||
const char *targetns = _textout(PG_GETARG_TEXT_P(3));
|
||||
|
||||
const char *xmlschema;
|
||||
void *plan;
|
||||
Portal portal;
|
||||
|
||||
SPI_connect();
|
||||
plan = SPI_prepare(query, 0, NULL);
|
||||
portal = SPI_cursor_open(NULL, plan, NULL, NULL, true);
|
||||
xmlschema = _SPI_strdup(map_sql_table_to_xmlschema(portal->tupDesc, InvalidOid, nulls, tableforest, targetns));
|
||||
SPI_cursor_close(portal);
|
||||
SPI_finish();
|
||||
|
||||
PG_RETURN_XML_P(stringinfo_to_xmltype(query_to_xml_internal(query, NULL, xmlschema, nulls, tableforest, targetns)));
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Map a multi-part SQL name to an XML name; see SQL/XML:2003 section
|
||||
* 9.2.
|
||||
*/
|
||||
static char *
|
||||
map_multipart_sql_identifier_to_xml_name(char *a, char *b, char *c, char *d)
|
||||
{
|
||||
StringInfoData result;
|
||||
|
||||
initStringInfo(&result);
|
||||
|
||||
if (a)
|
||||
appendStringInfo(&result, "%s", map_sql_identifier_to_xml_name(a, true, true));
|
||||
if (b)
|
||||
appendStringInfo(&result, ".%s", map_sql_identifier_to_xml_name(b, true, true));
|
||||
if (c)
|
||||
appendStringInfo(&result, ".%s", map_sql_identifier_to_xml_name(c, true, true));
|
||||
if (d)
|
||||
appendStringInfo(&result, ".%s", map_sql_identifier_to_xml_name(d, true, true));
|
||||
|
||||
return result.data;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Map an SQL table to an XML Schema document; see SQL/XML:2003
|
||||
* section 9.3.
|
||||
*
|
||||
* Map an SQL table to XML Schema data types; see SQL/XML:2003 section
|
||||
* 9.6.
|
||||
*/
|
||||
static const char *
|
||||
map_sql_table_to_xmlschema(TupleDesc tupdesc, Oid relid, bool nulls, bool tableforest, const char *targetns)
|
||||
{
|
||||
int i;
|
||||
char *xmltn;
|
||||
char *tabletypename;
|
||||
char *rowtypename;
|
||||
StringInfoData result;
|
||||
|
||||
initStringInfo(&result);
|
||||
|
||||
if (relid)
|
||||
{
|
||||
HeapTuple tuple = SearchSysCache(RELOID, ObjectIdGetDatum(relid), 0, 0, 0);
|
||||
Form_pg_class reltuple = (Form_pg_class) GETSTRUCT(tuple);
|
||||
|
||||
xmltn = map_sql_identifier_to_xml_name(NameStr(reltuple->relname), true, false);
|
||||
|
||||
tabletypename = map_multipart_sql_identifier_to_xml_name("TableType",
|
||||
get_database_name(MyDatabaseId),
|
||||
get_namespace_name(reltuple->relnamespace),
|
||||
NameStr(reltuple->relname));
|
||||
|
||||
rowtypename = map_multipart_sql_identifier_to_xml_name("RowType",
|
||||
get_database_name(MyDatabaseId),
|
||||
get_namespace_name(reltuple->relnamespace),
|
||||
NameStr(reltuple->relname));
|
||||
|
||||
ReleaseSysCache(tuple);
|
||||
}
|
||||
else
|
||||
{
|
||||
if (tableforest)
|
||||
xmltn = "row";
|
||||
else
|
||||
xmltn = "table";
|
||||
|
||||
tabletypename = "TableType";
|
||||
rowtypename = "RowType";
|
||||
}
|
||||
|
||||
appendStringInfoString(&result,
|
||||
"<xsd:schema\n"
|
||||
" xmlns:xsd=\"" NAMESPACE_XSD "\"");
|
||||
if (strlen(targetns) > 0)
|
||||
appendStringInfo(&result,
|
||||
"\n"
|
||||
" targetNamespace=\"%s\"\n"
|
||||
" elementFormDefault=\"qualified\"",
|
||||
targetns);
|
||||
appendStringInfoString(&result,
|
||||
">\n\n");
|
||||
|
||||
appendStringInfoString(&result,
|
||||
map_sql_typecoll_to_xmlschema_types(tupdesc));
|
||||
|
||||
appendStringInfo(&result,
|
||||
"<xsd:complexType name=\"%s\">\n"
|
||||
" <xsd:sequence>\n",
|
||||
rowtypename);
|
||||
|
||||
for (i = 0; i < tupdesc->natts; i++)
|
||||
appendStringInfo(&result,
|
||||
" <xsd:element name=\"%s\" type=\"%s\"%s></xsd:element>\n",
|
||||
map_sql_identifier_to_xml_name(NameStr(tupdesc->attrs[i]->attname), true, false),
|
||||
map_sql_type_to_xml_name(tupdesc->attrs[i]->atttypid, -1),
|
||||
nulls ? " nillable=\"true\"" : " minOccurs=\"0\"");
|
||||
|
||||
appendStringInfoString(&result,
|
||||
" </xsd:sequence>\n"
|
||||
"</xsd:complexType>\n\n");
|
||||
|
||||
if (!tableforest)
|
||||
{
|
||||
appendStringInfo(&result,
|
||||
"<xsd:complexType name=\"%s\">\n"
|
||||
" <xsd:sequence>\n"
|
||||
" <xsd:element name=\"row\" type=\"%s\" minOccurs=\"0\" maxOccurs=\"unbounded\"/>\n"
|
||||
" </xsd:sequence>\n"
|
||||
"</xsd:complexType>\n\n",
|
||||
tabletypename, rowtypename);
|
||||
|
||||
appendStringInfo(&result,
|
||||
"<xsd:element name=\"%s\" type=\"%s\"/>\n\n",
|
||||
xmltn, tabletypename);
|
||||
}
|
||||
else
|
||||
appendStringInfo(&result,
|
||||
"<xsd:element name=\"%s\" type=\"%s\"/>\n\n",
|
||||
xmltn, rowtypename);
|
||||
|
||||
appendStringInfoString(&result,
|
||||
"</xsd:schema>");
|
||||
|
||||
return result.data;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Map an SQL data type to an XML name; see SQL/XML:2003 section 9.9.
|
||||
*/
|
||||
static const char *
|
||||
map_sql_type_to_xml_name(Oid typeoid, int typmod)
|
||||
{
|
||||
StringInfoData result;
|
||||
|
||||
initStringInfo(&result);
|
||||
|
||||
switch(typeoid)
|
||||
{
|
||||
case BPCHAROID:
|
||||
if (typmod == -1)
|
||||
appendStringInfo(&result, "CHAR");
|
||||
else
|
||||
appendStringInfo(&result, "CHAR_%d", typmod - VARHDRSZ);
|
||||
break;
|
||||
case VARCHAROID:
|
||||
if (typmod == -1)
|
||||
appendStringInfo(&result, "VARCHAR");
|
||||
else
|
||||
appendStringInfo(&result, "VARCHAR_%d", typmod - VARHDRSZ);
|
||||
break;
|
||||
case NUMERICOID:
|
||||
if (typmod == -1)
|
||||
appendStringInfo(&result, "NUMERIC");
|
||||
else
|
||||
appendStringInfo(&result, "NUMERIC_%d_%d",
|
||||
((typmod - VARHDRSZ) >> 16) & 0xffff,
|
||||
(typmod - VARHDRSZ) & 0xffff);
|
||||
break;
|
||||
case INT4OID:
|
||||
appendStringInfo(&result, "INTEGER");
|
||||
break;
|
||||
case INT2OID:
|
||||
appendStringInfo(&result, "SMALLINT");
|
||||
break;
|
||||
case INT8OID:
|
||||
appendStringInfo(&result, "BIGINT");
|
||||
break;
|
||||
case FLOAT4OID:
|
||||
appendStringInfo(&result, "REAL");
|
||||
break;
|
||||
case FLOAT8OID:
|
||||
appendStringInfo(&result, "DOUBLE");
|
||||
break;
|
||||
case BOOLOID:
|
||||
appendStringInfo(&result, "BOOLEAN");
|
||||
break;
|
||||
case TIMEOID:
|
||||
if (typmod == -1)
|
||||
appendStringInfo(&result, "TIME");
|
||||
else
|
||||
appendStringInfo(&result, "TIME_%d", typmod);
|
||||
break;
|
||||
case TIMETZOID:
|
||||
if (typmod == -1)
|
||||
appendStringInfo(&result, "TIME_WTZ");
|
||||
else
|
||||
appendStringInfo(&result, "TIME_WTZ_%d", typmod);
|
||||
break;
|
||||
case TIMESTAMPOID:
|
||||
if (typmod == -1)
|
||||
appendStringInfo(&result, "TIMESTAMP");
|
||||
else
|
||||
appendStringInfo(&result, "TIMESTAMP_%d", typmod);
|
||||
break;
|
||||
case TIMESTAMPTZOID:
|
||||
if (typmod == -1)
|
||||
appendStringInfo(&result, "TIMESTAMP_WTZ");
|
||||
else
|
||||
appendStringInfo(&result, "TIMESTAMP_WTZ_%d", typmod);
|
||||
break;
|
||||
case DATEOID:
|
||||
appendStringInfo(&result, "DATE");
|
||||
break;
|
||||
case XMLOID:
|
||||
appendStringInfo(&result, "XML");
|
||||
break;
|
||||
default:
|
||||
{
|
||||
HeapTuple tuple = SearchSysCache(TYPEOID, ObjectIdGetDatum(typeoid), 0, 0, 0);
|
||||
Form_pg_type typtuple = (Form_pg_type) GETSTRUCT(tuple);
|
||||
|
||||
appendStringInfoString(&result,
|
||||
map_multipart_sql_identifier_to_xml_name((typtuple->typtype == 'd') ? "Domain" : "UDT",
|
||||
get_database_name(MyDatabaseId),
|
||||
get_namespace_name(typtuple->typnamespace),
|
||||
NameStr(typtuple->typname)));
|
||||
|
||||
ReleaseSysCache(tuple);
|
||||
}
|
||||
}
|
||||
|
||||
return result.data;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Map a collection of SQL data types to XML Schema data types; see
|
||||
* SQL/XML:2002 section 9.10.
|
||||
*/
|
||||
static const char *
|
||||
map_sql_typecoll_to_xmlschema_types(TupleDesc tupdesc)
|
||||
{
|
||||
Oid *uniquetypes;
|
||||
int i, j;
|
||||
int len;
|
||||
StringInfoData result;
|
||||
|
||||
initStringInfo(&result);
|
||||
|
||||
uniquetypes = palloc(2 * sizeof(*uniquetypes) * tupdesc->natts);
|
||||
len = 0;
|
||||
|
||||
for (i = 1; i <= tupdesc->natts; i++)
|
||||
{
|
||||
bool already_done = false;
|
||||
Oid type = SPI_gettypeid(tupdesc, i);
|
||||
for (j = 0; j < len; j++)
|
||||
if (type == uniquetypes[j])
|
||||
{
|
||||
already_done = true;
|
||||
break;
|
||||
}
|
||||
if (already_done)
|
||||
continue;
|
||||
|
||||
uniquetypes[len++] = type;
|
||||
}
|
||||
|
||||
/* add base types of domains */
|
||||
for (i = 0; i < len; i++)
|
||||
{
|
||||
bool already_done = false;
|
||||
Oid type = getBaseType(uniquetypes[i]);
|
||||
for (j = 0; j < len; j++)
|
||||
if (type == uniquetypes[j])
|
||||
{
|
||||
already_done = true;
|
||||
break;
|
||||
}
|
||||
if (already_done)
|
||||
continue;
|
||||
|
||||
uniquetypes[len++] = type;
|
||||
}
|
||||
|
||||
for (i = 0; i < len; i++)
|
||||
appendStringInfo(&result, "%s\n", map_sql_type_to_xmlschema_type(uniquetypes[i], -1));
|
||||
|
||||
return result.data;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Map an SQL data type to a named XML Schema data type; see SQL/XML
|
||||
* sections 9.11 and 9.15.
|
||||
*
|
||||
* (The distinction between 9.11 and 9.15 is basically that 9.15 adds
|
||||
* a name attribute, which thsi function does. The name-less version
|
||||
* 9.11 doesn't appear to be required anywhere.)
|
||||
*/
|
||||
static const char *
|
||||
map_sql_type_to_xmlschema_type(Oid typeoid, int typmod)
|
||||
{
|
||||
StringInfoData result;
|
||||
const char *typename = map_sql_type_to_xml_name(typeoid, typmod);
|
||||
|
||||
initStringInfo(&result);
|
||||
|
||||
if (typeoid == XMLOID)
|
||||
{
|
||||
appendStringInfo(&result,
|
||||
"<xsd:complexType mixed=\"true\">\n"
|
||||
" <xsd:sequence>\n"
|
||||
" <xsd:any name=\"element\" minOccurs=\"0\" maxOccurs=\"unbounded\" processContents=\"skip\"/>\n"
|
||||
" </xsd:sequence>\n"
|
||||
"</xsd:complexType>\n");
|
||||
}
|
||||
else
|
||||
{
|
||||
appendStringInfo(&result,
|
||||
"<xsd:simpleType name=\"%s\">\n", typename);
|
||||
|
||||
switch(typeoid)
|
||||
{
|
||||
case BPCHAROID:
|
||||
case VARCHAROID:
|
||||
case TEXTOID:
|
||||
if (typmod != -1)
|
||||
appendStringInfo(&result,
|
||||
" <xsd:restriction base=\"xsd:string\">\n"
|
||||
" <xsd:maxLength value=\"%d\"/>\n"
|
||||
" </xsd:restriction>\n",
|
||||
typmod - VARHDRSZ);
|
||||
break;
|
||||
|
||||
case BYTEAOID:
|
||||
appendStringInfo(&result,
|
||||
" <xsd:restriction base=\"xsd:%s\">\n"
|
||||
" </xsd:restriction>\n",
|
||||
xmlbinary == XMLBINARY_BASE64 ? "base64Binary" : "hexBinary");
|
||||
|
||||
case NUMERICOID:
|
||||
if (typmod != -1)
|
||||
appendStringInfo(&result,
|
||||
" <xsd:restriction base=\"xsd:decimal\">\n"
|
||||
" <xsd:totalDigits value=\"%d\"/>\n"
|
||||
" <xsd:fractionDigits value=\"%d\"/>\n"
|
||||
" </xsd:restriction>\n",
|
||||
((typmod - VARHDRSZ) >> 16) & 0xffff,
|
||||
(typmod - VARHDRSZ) & 0xffff);
|
||||
break;
|
||||
|
||||
case INT2OID:
|
||||
appendStringInfo(&result,
|
||||
" <xsd:restriction base=\"xsd:short\">\n"
|
||||
" <xsd:maxInclusive value=\"%d\"/>\n"
|
||||
" <xsd:minInclusive value=\"%d\"/>\n"
|
||||
" </xsd:restriction>\n",
|
||||
SHRT_MAX, SHRT_MIN);
|
||||
break;
|
||||
|
||||
case INT4OID:
|
||||
appendStringInfo(&result,
|
||||
" <xsd:restriction base='xsd:int'>\n"
|
||||
" <xsd:maxInclusive value=\"%d\"/>\n"
|
||||
" <xsd:minInclusive value=\"%d\"/>\n"
|
||||
" </xsd:restriction>\n",
|
||||
INT_MAX, INT_MIN);
|
||||
break;
|
||||
|
||||
case INT8OID:
|
||||
appendStringInfo(&result,
|
||||
" <xsd:restriction base=\"xsd:long\">\n"
|
||||
" <xsd:maxInclusive value=\"" INT64_FORMAT "\"/>\n"
|
||||
" <xsd:minInclusive value=\"" INT64_FORMAT "\"/>\n"
|
||||
" </xsd:restriction>\n",
|
||||
INT64_MAX, INT64_MIN);
|
||||
break;
|
||||
|
||||
case FLOAT4OID:
|
||||
appendStringInfo(&result,
|
||||
" <xsd:restriction base=\"xsd:float\"></xsd:restriction>\n");
|
||||
break;
|
||||
|
||||
case FLOAT8OID:
|
||||
appendStringInfo(&result,
|
||||
" <xsd:restriction base=\"xsd:double\"></xsd:restriction>\n");
|
||||
break;
|
||||
|
||||
case BOOLOID:
|
||||
appendStringInfo(&result,
|
||||
" <xsd:restriction base=\"xsd:boolean\"></xsd:restriction>\n");
|
||||
break;
|
||||
|
||||
case TIMEOID:
|
||||
case TIMETZOID:
|
||||
{
|
||||
const char *tz = (typeoid == TIMETZOID ? "(+|-)\\p{Nd}{2}:\\p{Nd}{2}" : "");
|
||||
|
||||
if (typmod == -1)
|
||||
appendStringInfo(&result,
|
||||
" <xsd:restriction base=\"xsd:time\">\n"
|
||||
" <xsd:pattern value=\"\\p{Nd}{2}:\\p{Nd}{2}:\\p{Nd}{2}(.\\p{Nd}+)?%s\"/>\n"
|
||||
" </xsd:restriction>\n", tz);
|
||||
else if (typmod == 0)
|
||||
appendStringInfo(&result,
|
||||
" <xsd:restriction base=\"xsd:time\">\n"
|
||||
" <xsd:pattern value=\"\\p{Nd}{2}:\\p{Nd}{2}:\\p{Nd}{2}%s\"/>\n"
|
||||
" </xsd:restriction>\n", tz);
|
||||
else
|
||||
appendStringInfo(&result,
|
||||
" <xsd:restriction base=\"xsd:time\">\n"
|
||||
" <xsd:pattern value=\"\\p{Nd}{2}:\\p{Nd}{2}:\\p{Nd}{2}.\\p{Nd}{%d}%s\"/>\n"
|
||||
" </xsd:restriction>\n", typmod - VARHDRSZ, tz);
|
||||
break;
|
||||
}
|
||||
|
||||
case TIMESTAMPOID:
|
||||
case TIMESTAMPTZOID:
|
||||
{
|
||||
const char *tz = (typeoid == TIMESTAMPTZOID ? "(+|-)\\p{Nd}{2}:\\p{Nd}{2}" : "");
|
||||
|
||||
if (typmod == -1)
|
||||
appendStringInfo(&result,
|
||||
" <xsd:restriction base=\"xsd:time\">\n"
|
||||
" <xsd:pattern value=\"\\p{Nd}{4}-\\p{Nd}{2}-\\p{Nd}{2}T\\p{Nd}{2}:\\p{Nd}{2}:\\p{Nd}{2}(.\\p{Nd}+)?%s\"/>\n"
|
||||
" </xsd:restriction>\n", tz);
|
||||
else if (typmod == 0)
|
||||
appendStringInfo(&result,
|
||||
" <xsd:restriction base=\"xsd:time\">\n"
|
||||
" <xsd:pattern value=\"\\p{Nd}{4}-\\p{Nd}{2}-\\p{Nd}{2}T\\p{Nd}{2}:\\p{Nd}{2}:\\p{Nd}{2}%s\"/>\n"
|
||||
" </xsd:restriction>\n", tz);
|
||||
else
|
||||
appendStringInfo(&result,
|
||||
" <xsd:restriction base=\"xsd:time\">\n"
|
||||
" <xsd:pattern value=\"\\p{Nd}{4}-\\p{Nd}{2}-\\p{Nd}{2}T\\p{Nd}{2}:\\p{Nd}{2}:\\p{Nd}{2}.\\p{Nd}{%d}%s\"/>\n"
|
||||
" </xsd:restriction>\n", typmod - VARHDRSZ, tz);
|
||||
break;
|
||||
}
|
||||
|
||||
case DATEOID:
|
||||
appendStringInfo(&result,
|
||||
" <xsd:restriction base=\"xsd:date\">\n"
|
||||
" <xsd:pattern value=\"\\p{Nd}{4}-\\p{Nd}{2}-\\p{Nd}{2}\"/>\n"
|
||||
" </xsd:restriction>\n");
|
||||
break;
|
||||
|
||||
default:
|
||||
if (get_typtype(typeoid) == 'd')
|
||||
{
|
||||
Oid base_typeoid;
|
||||
int32 base_typmod = -1;
|
||||
|
||||
base_typeoid = getBaseTypeAndTypmod(typeoid, &base_typmod);
|
||||
|
||||
appendStringInfo(&result,
|
||||
" <xsd:restriction base=\"%s\">\n",
|
||||
map_sql_type_to_xml_name(base_typeoid, base_typmod));
|
||||
}
|
||||
}
|
||||
appendStringInfo(&result,
|
||||
"</xsd:simpleType>\n");
|
||||
}
|
||||
|
||||
return result.data;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Map an SQL row to an XML element, taking the row from the active
|
||||
* SPI cursor. See also SQL/XML:2003 section 9.12.
|
||||
*/
|
||||
static void
|
||||
SPI_sql_row_to_xmlelement(int rownum, StringInfo result, char *tablename, bool nulls, bool tableforest, const char *targetns)
|
||||
{
|
||||
int i;
|
||||
char *xmltn;
|
||||
|
||||
if (tablename)
|
||||
xmltn = map_sql_identifier_to_xml_name(tablename, true, false);
|
||||
else
|
||||
{
|
||||
if (tableforest)
|
||||
xmltn = "row";
|
||||
else
|
||||
xmltn = "table";
|
||||
}
|
||||
|
||||
if (tableforest)
|
||||
{
|
||||
appendStringInfo(result, "<%s xmlns:xsi=\"" NAMESPACE_XSI "\"", xmltn);
|
||||
if (strlen(targetns) > 0)
|
||||
appendStringInfo(result, " xmlns=\"%s\"", targetns);
|
||||
appendStringInfo(result, ">\n");
|
||||
}
|
||||
else
|
||||
appendStringInfoString(result, "<row>\n");
|
||||
|
||||
for(i = 1; i <= SPI_tuptable->tupdesc->natts; i++)
|
||||
{
|
||||
char *colname;
|
||||
Datum colval;
|
||||
bool isnull;
|
||||
|
||||
colname = map_sql_identifier_to_xml_name(SPI_fname(SPI_tuptable->tupdesc, i), true, false);
|
||||
colval = SPI_getbinval(SPI_tuptable->vals[rownum], SPI_tuptable->tupdesc, i, &isnull);
|
||||
|
||||
if (isnull)
|
||||
{
|
||||
if (nulls)
|
||||
appendStringInfo(result, " <%s xsi:nil='true'/>\n", colname);
|
||||
|
||||
}
|
||||
else
|
||||
appendStringInfo(result, " <%s>%s</%s>\n",
|
||||
colname, map_sql_value_to_xml_value(colval, SPI_gettypeid(SPI_tuptable->tupdesc, i)),
|
||||
colname);
|
||||
}
|
||||
|
||||
if (tableforest)
|
||||
appendStringInfo(result, "</%s>\n\n", xmltn);
|
||||
else
|
||||
appendStringInfoString(result, "</row>\n\n");
|
||||
}
|
||||
|
||||
@ -37,7 +37,7 @@
|
||||
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $PostgreSQL: pgsql/src/include/catalog/catversion.h,v 1.384 2007/02/14 01:58:58 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/include/catalog/catversion.h,v 1.385 2007/02/16 07:46:55 petere Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -53,6 +53,6 @@
|
||||
*/
|
||||
|
||||
/* yyyymmddN */
|
||||
#define CATALOG_VERSION_NO 200702131
|
||||
#define CATALOG_VERSION_NO 200702161
|
||||
|
||||
#endif
|
||||
|
||||
@ -7,7 +7,7 @@
|
||||
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $PostgreSQL: pgsql/src/include/catalog/pg_proc.h,v 1.443 2007/02/07 23:11:30 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/include/catalog/pg_proc.h,v 1.444 2007/02/16 07:46:55 petere Exp $
|
||||
*
|
||||
* NOTES
|
||||
* The script catalog/genbki.sh reads this file and generates .bki
|
||||
@ -4050,6 +4050,24 @@ DESCR("concatenate XML values");
|
||||
DATA(insert OID = 2922 ( text PGNSP PGUID 12 1 0 f f t f s 1 25 "142" _null_ _null_ _null_ xmltotext - _null_ ));
|
||||
DESCR("serialize an XML value to a character string");
|
||||
|
||||
DATA(insert ( table_to_xml PGNSP PGUID 12 100 0 f f t f s 4 142 "2205 16 16 25" _null_ _null_ "{tbl,nulls,tableforest,targetns}" table_to_xml - _null_ ));
|
||||
DESCR("map table contents to XML");
|
||||
DATA(insert ( query_to_xml PGNSP PGUID 12 100 0 f f t f s 4 142 "25 16 16 25" _null_ _null_ "{query,nulls,tableforest,targetns}" query_to_xml - _null_ ));
|
||||
DESCR("map query result to XML");
|
||||
DATA(insert ( cursor_to_xml PGNSP PGUID 12 100 0 f f t f s 5 142 "1790 23 16 16 25" _null_ _null_ "{cursor,count,nulls,tableforest,targetns}" cursor_to_xml - _null_ ));
|
||||
DESCR("map rows from cursor to XML");
|
||||
DATA(insert ( table_to_xmlschema PGNSP PGUID 12 100 0 f f t f s 4 142 "2205 16 16 25" _null_ _null_ "{tbl,nulls,tableforest,targetns}" table_to_xmlschema - _null_ ));
|
||||
DESCR("map table structure to XML Schema");
|
||||
DATA(insert ( query_to_xmlschema PGNSP PGUID 12 100 0 f f t f s 4 142 "25 16 16 25" _null_ _null_ "{query,nulls,tableforest,targetns}" query_to_xmlschema - _null_ ));
|
||||
DESCR("map query result structure to XML Schema");
|
||||
DATA(insert ( cursor_to_xmlschema PGNSP PGUID 12 100 0 f f t f s 4 142 "1790 16 16 25" _null_ _null_ "{cursor,nulls,tableforest,targetns}" cursor_to_xmlschema - _null_ ));
|
||||
DESCR("map cursor structure to XML Schema");
|
||||
DATA(insert ( table_to_xml_and_xmlschema PGNSP PGUID 12 100 0 f f t f s 4 142 "2205 16 16 25" _null_ _null_ "{tbl,nulls,tableforest,targetns}" table_to_xml_and_xmlschema - _null_ ));
|
||||
DESCR("map table contents and structure to XML and XML Schema");
|
||||
DATA(insert ( query_to_xml_and_xmlschema PGNSP PGUID 12 100 0 f f t f s 4 142 "25 16 16 25" _null_ _null_ "{query,nulls,tableforest,targetns}" query_to_xml_and_xmlschema - _null_ ));
|
||||
DESCR("map query result and structure to XML and XML Schema");
|
||||
|
||||
|
||||
/* uuid */
|
||||
DATA(insert OID = 2952 ( uuid_in PGNSP PGUID 12 1 0 f f t f i 1 2950 "2275" _null_ _null_ _null_ uuid_in - _null_ ));
|
||||
DESCR("I/O");
|
||||
|
||||
@ -7,7 +7,7 @@
|
||||
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $PostgreSQL: pgsql/src/include/utils/xml.h,v 1.15 2007/02/11 22:18:16 petere Exp $
|
||||
* $PostgreSQL: pgsql/src/include/utils/xml.h,v 1.16 2007/02/16 07:46:55 petere Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -37,6 +37,15 @@ extern Datum texttoxml(PG_FUNCTION_ARGS);
|
||||
extern Datum xmltotext(PG_FUNCTION_ARGS);
|
||||
extern Datum xmlvalidate(PG_FUNCTION_ARGS);
|
||||
|
||||
extern Datum table_to_xml(PG_FUNCTION_ARGS);
|
||||
extern Datum query_to_xml(PG_FUNCTION_ARGS);
|
||||
extern Datum cursor_to_xml(PG_FUNCTION_ARGS);
|
||||
extern Datum table_to_xmlschema(PG_FUNCTION_ARGS);
|
||||
extern Datum query_to_xmlschema(PG_FUNCTION_ARGS);
|
||||
extern Datum cursor_to_xmlschema(PG_FUNCTION_ARGS);
|
||||
extern Datum table_to_xml_and_xmlschema(PG_FUNCTION_ARGS);
|
||||
extern Datum query_to_xml_and_xmlschema(PG_FUNCTION_ARGS);
|
||||
|
||||
typedef enum
|
||||
{
|
||||
XML_STANDALONE_YES,
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user