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ORA-00911: invalid character tips

Oracle Error Tips by Burleson Consulting

 

Oracle docs note this about ORA-00911:

ORA-00911: invalid character
Cause: identifiers may not start with any ASCII character other than letters and numbers. $#_ are also allowed after the first character. Identifiers enclosed by double quotes may contain any character other than a double quote. Alternative quotes (q"#...#") cannot use spaces, tabs, or carriage returns as delimiters. For all other contexts, consult the SQL Language Reference Manual.
Action: none

ORA-00911 is a common error for common syntax mistakes.  Oracle MOSC has a common example that is often seen in Enterprise Manager Control of version 10.1.0.4 on any platform. 

The symptoms of this form of ORA-00911 are the failure of Enterprise Manager 10g SQL User Defined Metric, along with the ORA-00911 alert.  Here is an example, using emagent.trc :

SQL = "/* OracleOEM */

DECLARE
udm_id VARCHAR2(64) := :1;
sql_st"...
LOGIN = <USERNAME>/<PW>@(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=<DBHOST>)(PORT=1521))(CONNECT_DATA=(SID=TOMIS)))
<TIMESTAMP> Thread-<THREAD#> ERROR fetchlets.sql: ORA-00911: invalid character
ORA-06512: at line 31
<TIMESTAMP> Thread-<THREAD#> ERROR engine: [oracle_database,<DB_HOST>,
SQLUDMNUM] : nmeegd_GetMetricData failed : ORA-00911: invalid character
ORA-06512: at line 31

<TIMESTAMP> Thread-<THREAD#> WARN collector: <nmecmc.c> Error exit. Error
message: ORA-00911: invalid character ORA-06512: at line 31
<TIMESTAMP> Thread-<THREAD#> WARN vpxoci: OCI Error -- ErrorCode(911):
ORA-00911: invalid character
ORA-06512: at line 31

What has happened in this case is that ORA-00911 is thrown because of a semi-colon in the SQL of UDM.  The semi-colon is an invalid character, causing ORA-00911 to appear.  To fix, you should try the SQL again without the inappropriate semi-colon to remedy the ORA-00911 error. 


Resolving ORA-00911 concerns a lot of trouble shooting since the ORA-00911 error signifies characters which can be caused by common syntax mistakes.  If you are encountering ORA-00911 and need help finding the source, you should refer to this article to get some tips on troubleshooting SQL errors. 


 

 

  
 

 
 
 
 
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