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    <p>I fail to see the problem you're having other than PostgreSQL breaking features. In the first document </p> <p>This is the expected behavior from a strict XML parser. The fact that PostgreSQL changed behavior is bad, but something we just have to deal with I guess.</p> <p>This</p> <pre><code>SELECT xpath('/a', '&lt;a s:dd="11"&gt;&lt;c&gt;test&lt;/c&gt;&lt;/a&gt;') </code></pre> <p>fails because the <code>s</code> namespace is not declared in the XML document. This works:</p> <pre><code># SELECT xpath('/a', '&lt;a xmlns:s="http://example.com" s:dd="11"&gt;&lt;c&gt;..&lt;/c&gt;&lt;/a&gt;'); xpath -------------------------------------------------- {"&lt;a xmlns:s=\"http://example.com\" s:dd=\"11\"&gt;+ &lt;c&gt;..&lt;/c&gt; + &lt;/a&gt;"} (1 row) </code></pre> <p>What you're doing here:</p> <pre><code>SELECT xpath('/a', '&lt;a xmlns:s="http://example.com" s:dd="11"&gt;&lt;c&gt;..&lt;/c&gt;&lt;/a&gt;', ARRAY[ARRAY['s', 'http://example.com']]); </code></pre> <p>is to bind the <code>s</code> namespace to <code>http://example.com</code> enabling you to run xpath expressions in that namespace. Observe:</p> <p>This is the original query but where the <code>a</code> tag is in the <code>http://example.com</code> namespace. Your query (<code>/a</code>) doesn't match any document as you're querying for <code>a</code> elements in the default namespace:</p> <pre><code># SELECT xpath('/a', '&lt;s:a xmlns:s="http://example.com" s:dd="11"&gt;&lt;c&gt;test&lt;/c&gt;&lt;/s:a&gt;'); xpath ------- {} (1 row) </code></pre> <p>This however, selects the root element:</p> <pre><code># SELECT xpath('/x:a', '&lt;s:a xmlns:s="http://example.com" s:dd="11"&gt;&lt;c&gt;..&lt;/c&gt;&lt;/s:a&gt;', ARRAY[ARRAY['x', 'http://example.com']]); xpath ---------------------------------------------------- {"&lt;s:a xmlns:s=\"http://example.com\" s:dd=\"11\"&gt;+ &lt;c&gt;test&lt;/c&gt; + &lt;/s:a&gt;"} (1 row) </code></pre> <p>Notice how <code>s</code> and <code>x</code> are bound to the same namespace <code>http://example.com</code>. Using different namespace bindings is confusing, but I just wanted to show you how it works.</p>
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    1. POPostgresql 9.2 xml namespace prefix error
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    1. USTrygve Laugstøl
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    1. COSory, it's holidays in russia, until 9th january. I'll try, when i'll return to office, and write a response here.
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    2. COAh, no problem. Just wondering if was correct/helpful as I'm new to postgresql and xml myself.
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