Horton

Re: PostgreSQL vs SQL/XML Standards

Thomas Kellerer <spam_eater@gmx.net>

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From: Thomas Kellerer <spam_eater@gmx.net>
To: pgsql-hackers@postgresql.org
Date: 2018-10-29T10:40:49Z
Lists: pgsql-hackers 
>> I have a access to too old 11.2 Oracle.  There I had to modify query
>> because there is not boolean type. I replaced bool by int, but I got a
>> error
>> ORA-19224:XPTY-004 .. expected node()*, got xs:string - it doesn't work
>> with/without string() wrappings.
>>
>The problem is in last line - the expression  "sale/@taxable = false()" is
>not valid on Oracle. Using string() wrapping is a issue, because it returns
">true", "false", but Oracle int doesn't accept it.

That line seems to be valid - but you need to pass an XMLTYPE value, not a
VARCHAR

https://dbfiddle.uk/?rdbms=oracle_11.2&fiddle=21cdf890a26e97fa8667b2d6a960bd33

As far as I can tell inside XQuery Oracle does support boolean, but not as a
return type 





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Commits

  1. Improve documentation about our XML functionality

  2. Improve documentation about our XML functionality.

  3. Add volatile qualifier missed in commit 2e616dee9.

  4. Fix crash with old libxml2

  5. Fix minor deficiencies in XMLTABLE, xpath(), xmlexists()

  6. Fix the BY {REF,VALUE} clause of XMLEXISTS/XMLTABLE

  7. doc: Update README.links

  8. XPath fixes: