XML parsing failed in SELECT query - sql

Question

I am running the SELECT query from the Oracle SQL developer IDE on my RHEL box as below
SELECT count(*)
From xyz
WHERE xmltype(xyz.xmlColumn).existsNode('//name=""') = 1;
Above query works fine if I execute for single record. But when I execute it for the whole table it fails with the error:
ORA-31011: XML parsing failed
ORA-19202: Error occurred in XML processing
LPX-00210: expected '<' instead of 'C'
Error at line 1
ORA-06512: at "SYS.XMLTYPE", line 272
ORA-06512: at line 1
31011. 00000 - "XML parsing failed"
*Cause: XML parser returned an error while trying to parse the document.
*Action: Check if the document to be parsed is valid.
Any pointers on above will help me.

Answer 1

include /text in your xpath. like
select (COLUM_NAME).extract('//parentNode/chileNode/text()').getStringVal() as Colum_Name from TableName where UUID='Value'

Answer 2

Oracle is complaining that "xyz.xmlColumn" is not a valid xml column or type. It expects <element>....</element> format

Answer 3

Your problem is what is stored in your CLOB is not an XML document as it is missing a root node. Since you are scanning the whole document in your extract you could just wrap it in an element to ensure you have 1 and only 1 root, at which point your XMLTYPE cast would work.
SELECT
XMLTYPE(''||clob_field||'').EXTRACT('//se/text()').getStringVal()
FROM tablename