The enums are just a way to access the error codes symbolically. Usually, the error codes in Trafodion have ranges assigned to different components of the Trafodion engine. The errors originating in catalog manager component are expected to be CmpDDLCatErrorCodes.h and the errors originating in executor component are in exp/ExpErrorEnums.h. However, these grouping are not strictly enforced. At times, the error codes are used without enums (symbolic names).
There are many helper functions to populate the diagnostics area. Most often used functions are ExRaiseSqlErrors DgSqlCode DgString, DgInt ExRaiseSqlError is used in executor and mostly in work method of operators. It can be used when diagnostics area is not already allocated. This method allocates the diagnostics area and passes back to the caller. DgSqlCode concept is used in other areas of Trafodion when diagnostics area is already allocated and available. See https://issues.apache.org/jira/browse/TRAFODION-3009 and https://issues.apache.org/jira/browse/TRAFODION-2853 for details of the change that streamlined this concept to some extent. Selva -----Original Message----- From: Zhu, Wen-Jun <[email protected]> Sent: Tuesday, April 10, 2018 1:39 AM To: [email protected] Subject: issues on error message Hi, I am trying to add some error message in SqlciErrors.txt when new error happens. As far as I know, it uses message catalog, and the error number is a enum in CmpDDLCatErrorCodes.h. I guess there is a map between these two files, but it is not exactly mapped. Are there rules about this? Like feed DgSqlCode constructor with enum, not magic number, or something like this And what should I take care of?
