Pro*c selecting XMLElement strangeness

Question

I've had a pro*c problem that I can't figure out. Hopefully, one of you might be able to do so. I am trying to create a XML output from a select statement. I having several problems, but the first one is that I can't get a simple XMLElement to work.
Depending on how I do it, it either does not pre-compile or compiles - but does not work. Both queries work correctly in SQL*Plus.
Pro*c Code >>>>>>>>>>>>
EXEC SQL BEGIN DECLARE SECTION ;
OCIClobLocator *xmltype_lob;
EXEC SQL END DECLARE SECTION ;
EXEC SQL ALLOCATE :xmltype_lob;
EXEC SQL LOB CREATE TEMPORARY :xmltype_lob;
EXEC SQL
SELECT XMLElement("eligVerification", dummy ).getClobVal() <--line 125
INTO :xmltype_lob
FROM dual;
if ( sqlca.sqlcode != 0 )
fprintf (stderr, "Failed to get XML sqlca.sqlcode = %d\n" , sqlca.sqlcode ) ;
fflush(stderr);
exit ( EXIT_FAILURE ) ;
<<<<<<<<<<<<
This fails on the pre-compile:
Syntax error at line 125, column 55, file tester.sc:
Error at line 125, column 55 in file tester.sc
XMLElement("eligVerification", dummy ).getClobVal()
......................................................1
PCC-S-02201, Encountered the symbol "." when expecting one of the following:
, * + - / | an identifier, a quoted string, at, date, into,
as, count, from, day, extract, hour, interval, minute, month,
second, time, timestamp, treat, trim, year, avg, max, min,
sum, stddev, variance,
======================
If I remove the .getClobVal(), the SELECT now looks like:
Changed >>>>>>
EXEC SQL
SELECT XMLElement("eligVerification", dummy )
INTO :xmltype_lob
FROM dual;
<<<<<<<<<<<<
This does get thru the pre-compile and compiles just fine. At run time, I get this:
Failed to get XML sqlca.sqlcode = -932
From oerr, that is: 00932, 00000, "inconsistent datatypes: expected %s got %s"
Any thoughts?
We are using:
SunOS 5.10 Generic_147440-27 sun4u sparc SUNW,SPARC-Enterprise
Sun C 5.12 SunOS_sparc 2011/11/16
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
PL/SQL Release 11.2.0.3.0 - Production
CORE 11.2.0.3.0 Production
TNS for Solaris: Version 11.2.0.3.0 - Production
NLSRTL Version 11.2.0.3.0 - Production
Pro*C/C++: Release 11.2.0.3.0
Edited by: 989848 on Feb 22, 2013 12:43 PM

Answer 1

SELECT XMLElement("eligVerification", dummy ).getClobVal()
The syntax of this function call is wrong. XMLElement takes two parameters ("<NAME>", Identifier). You have added a call to GetClobVal(). You cannot do this!
See how to use XMLElement here... http://docs.oracle.com/cd/B19306_01/server.102/b14200/functions220.htm
The second problem is a type mismatch in the data you are bringing back and the variable you are trying to store it in. Remember C and Oracle datatypes are not the same!
Edited by: 996008 on 25-Mar-2013 08:15