Issue while "log errors into g_logtest_err(1) reject limit 1"

Question

Hi Gurus,
I am trying to log the errors occured during installation using log error into command.
insert into g_logtest(i, col1, col2) values (1, 'col1 23 ',' col2 g ') Log errors into g_logtest_err(1) reject limit 1;
The col1 lenght is 5 and col2 length is 10. when i run the query record gets inserted into g_logtest_err table
but the column values of g_logtest_err are getting truncated means instead of 'col1 23 ', it is inserting 'col1 123' and 'col2 g' for col2.
Could anyone please explain the behavior to me. Is this a default behavior or could be changed?
What changes could be made into query to achieve this? Is their any global parameter setting to achieve this ?
Please help, its urgent.
Thanks in advance
Girish

Answer 1

Justin Cave wrote:
Since the error table definition is based on the definition of the underlying table, I'm not sure that it would be reasonable for Oracle to attempt to solve this problem. Since Oracle has no idea how big the string that would be inserted into the column would be when it is creating the error table (or how big the number you would try to insert into a numeric column), the only options would be to duplicate the base table definition and truncate the data that caused the error or to define every column as VARCHAR2(4000) or CLOB and convert all the data from your INSERT statement before inserting it into the error log. That has its own downsides, of course, since there are lots of queries you might like to run against the error log that depend on the data types being correct that you couldn't run against a table with hundreds of CLOB columns.Justin,
the point is that obviously trailing spaces are getting truncated when populating the column values. So you end up with values that have less length than the maximum length of the target table, although the error message logged suggests otherwise.
By the way, when creating the error log table using "dbms_errlog.create_error_log" the columns are already defined as VARCHAR2(4000) regardless of the actual length of the column.
See the guideline how to create the error log table here:
http://download.oracle.com/docs/cd/B28359_01/server.111/b28310/tables004.htm
Regards,
Randolf
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