hi,
   The implements of 'xidin' use only ‘strtoul’ to cast from string to xid. So 
in some cases, may cause confusion, for example,
The sql 'select c1 from test where xmin='abc' can be executed.  and sometimes 
will make mistakes, I want to query "select c1 from test where xmin='0x10'" 
,but write 'Ox10', '0' to 'O',The result is obviously wrong.

The patch will correct it. I have justly copy some code of 'OID'. Whether we 
need to extract the common code?

Thanks.

Attachment: xid.patch
Description: Binary data

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