ORA-03113 when inserting a CLOB value casted as an XMLType from a SELECT query into a table

Question

I have a table that contains a CLOB column with pseudo-XML in it. I want to keep this data in an XMLType column so that I can leverage some of Oracle's built-in XML features to parse it more easily.
The source table is defined as:
CREATE TABLE "TSS_SRM_CBEBRE_LOGS_V"
( "INCIDENT_ID" NUMBER,
"EVENT_TYPE" VARCHAR2(100 BYTE) NOT NULL ENABLE,
"EVENT_KEY" VARCHAR2(100 BYTE),
"CREATION_DATE" TIMESTAMP (6) NOT NULL ENABLE,
"CREATED_BY" VARCHAR2(100 BYTE) NOT NULL ENABLE,
"LOG_MSG" CLOB);
The target (for testing this problem) table is defined as:
CREATE TABLE "TESTME"
( "LOG_MSG" "XMLTYPE"
My query is:
insert /*+ APPEND */ into testme ("LOG_MSG")
select XMLTYPE.createXML("LOG_MSG") as LOG_MSG from "TSS_SRM_CBEBRE_LOGS_V" b;
In SQL*Developer, my error is: Error report:
SQL Error: No more data to read from socket
In SQL*PLUS and Toad, my error is:
ORA-03113: end-of-file on communication channel
Process ID: 13903
Session ID: 414 Serial number: 32739

Answer 1

By pseudo-XML, I mean that it doesn't have the xml root node. The content structure is similar to the following:
<a attr1="1" attr2="2" />
<b attr1="3" attr2="4" />
<c attr1="5">
<e attr1="6" attr2="7" />
<e attr1="8" attr2="9" />
<e attr1="10" attr2="11" />
</c>
<d attr1="12" />
OK. Those are XML fragments then.
I'm surprised you say the query alone works.
We cannot build an XMLType instance using the default constructor or createXML() method when the content is composed of fragments.
AFAIK the only option is to use XMLParse() with CONTENT option :
SQL> select xmltype.createxml(LOG_MSG) from TSS_SRM_CBEBRE_LOGS_V;
ERROR:
ORA-31011: XML parsing failed
ORA-19202: Error occurred in XML processing
LPX-00245: extra data after end of document
Error at line 2
ORA-06512: at "SYS.XMLTYPE", line 5
no rows selected
SQL> select xmltype(LOG_MSG) from TSS_SRM_CBEBRE_LOGS_V;
ERROR:
ORA-31011: XML parsing failed
ORA-19202: Error occurred in XML processing
LPX-00245: extra data after end of document
Error at line 2
ORA-06512: at "SYS.XMLTYPE", line 272
ORA-06512: at line 1
no rows selected
SQL> select xmlparse(content LOG_MSG) from TSS_SRM_CBEBRE_LOGS_V;
XMLPARSE(CONTENTLOG_MSG)
<a attr1="1" attr2="2" />
<b attr1="3" attr2="4" />
<c attr1="5">
<e attr1="6" a
Anyway, you'll eventually hit this :
SQL> insert into testme (LOG_MSG)
  2  select XMLparse(content LOG_MSG)
  3  from TSS_SRM_CBEBRE_LOGS_V;
insert into testme (LOG_MSG)
ERROR at line 1:
ORA-19010: Cannot insert XML fragments