SQL Server won't perform regular expression validation on XML column

Posted by Kirk Broadhurst on Stack Overflow See other posts from Stack Overflow or by Kirk Broadhurst
Published on 2009-01-21T21:55:52Z Indexed on 2010/04/02 23:03 UTC
Read the original article Hit count: 380

Filed under:

sql

|

Xml

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regex

Hi

I have an XML column in my table which contains this xsd snippet:

<xsd:element name="Postcode" minOccurs="0">
    <xsd:simpleType>
        <xsd:restriction base="xsd:string">
            <xsd:pattern value="^[0-9]{4}$" />
        </xsd:restriction>
    </xsd:simpleType>
</xsd:element>

The regular expression should require a string containing 4 numerical digits. It validates perfectly in Visual Studio and is a correct regular expression.

SQL Server, on the other hand, won't accept it. The error message I receive is:

XML Validation: Invalid simple type value: '1234'. Location: / * : Donor[1]/*:Postcode[1].

I have an email address regex working fine, but can't get this simple numerical regex to work.

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