Oracle XML使用其他列中的值提取XPath

Question

I have a CLOB that contains an XML that has information for each row in a detail table. I want to extract the node text from the XML that applies to just the current detail row. The XPath for the extract would say essentially [@Line_ID=X] where X is the current row's LINE_ID value. Currently, I can only see how to hard-code the XPath in the extract command. The following SQL Fiddle shows the problem and the hard-coded XPath returning the wrong rows for the 2nd+ rows.

SQL Fiddle showing incorrect Oracle results.

I need this solution for both Oracle and SQL Server, and I was able to figure out the solution in SQL Server using the sql:column XPath function . This SQL Fiddle shows the correct results on a SQL Server database.

Is there an Oracle equivalent of the SQL Server sql:column function?

Answer 1

I was over-thinking this problem. Oracle allows you to use string concatenation inside the XPath. The XPath ends up looking like [@Line_ID="' || DtlAlias.Line_ID || '"]

An updated Fiddle that shows the correct results.