Term comparison for InPath

Question

I have a clob column with XML data.
<attrs><attr name="ESB_Availability_Status"><string>D</string></attr><attr name="ESB_Available_Stock"><int>0</int></attr><attr name="ESB_IsTaxable"><boolean>true</boolean></attr><attr name="ESB_isLeaseAvailable"><boolean>true</boolean></attr></attrs>
When I use the following query it does not match and find any rows.
SELECT
  extractValue(
    XmlType(attributes),
    '/attrs/attr[@name="ESB_Availability_Status"]/string'
  ) AS ESB_Availability_Status
FROM
  MyTable
  WHERE
  CONTAINS(
    attributes,
    '{D} INPATH (/attrs/attr[@name="ESB_Availability_Status"]/string)'
  ) > 0
But when I update the column with data like this with value P (or for that matter any other charcter N,DQ etc.). It retrieves data.
<attrs><attr name="ESB_Availability_Status"><string>P</string></attr><attr name="ESB_Available_Stock"><int>0</int></attr><attr name="ESB_IsTaxable"><boolean>true</boolean></attr><attr name="ESB_isLeaseAvailable"><boolean>true</boolean></attr></attrs>
SELECT
  extractValue(
    XmlType(attributes),
    '/attrs/attr[@name="ESB_Availability_Status"]/string'
  ) AS ESB_Availability_Status
FROM
  MyTable
  WHERE
  CONTAINS(
    attributes,
    '{P} INPATH (/attrs/attr[@name="ESB_Availability_Status"]/string)'
  ) > 0
What is happening with the comparison term?

Answer 1

As this question has nothing to do with the XML DB, you have lowered your chance of getting the answer you seek.
I think you might be looking for
https://forums.oracle.com/community/developer/english/oracle_database/text
Without knowing your version, or apparently having an index setup like you do what about something like
SELECT
  extractValue(
    XmlType(attributes),
    '/attrs/attr[@name="ESB_Availability_Status"]/string[text()="D"]'
  ) AS ESB_Availability_Status
FROM
  MyTable
which does return empty rows if the condition is not meet or
SELECT *
  FROM (SELECT
        extractValue(
          XmlType(attributes),
          '/attrs/attr[@name="ESB_Availability_Status"]/string'
        ) AS ESB_Availability_Status
      FROM
        MyTable)
  WHERE ESB_Availability_Status = 'D';
Of course there are also XMLTable/XQuery based approaches as well if you so desire.