Pivotal Knowledge Base


gptransfer Fails with Message "[ERROR]:-Found unsupported identifiers"


  • Pivotal Greenplum 4.3.x
  • Operating System- Red Hat Enterprise Linux 6.x


When attempting a database migration with gptransfer, it fails with the error message “Found unsupported identifiers.”

Error Message:

20170615:22:30:22:261818 gptransfer:mdw:gpadmin-[INFO]:-Starting gptransfer with args: -d analyticsdb --source-port=5432 --source-host --source-user gpadmin --dest-database=analyticsdb2 --dest-user gpadmin --dest-host= --dest-port=5432 --source-map-file=/home/gpadmin/host_map_file 
20170615:22:30:22:261818 gptransfer:mdw:gpadmin-[INFO]:-Validating options...
20170615:22:30:22:261818 gptransfer:mdw:gpadmin-[INFO]:-Retrieving configuration of source Greenplum Database...
20170615:22:30:29:261818 gptransfer:mdw:gpadmin-[INFO]:-Retrieving configuration of destination Greenplum Database...
20170615:22:30:33:261818 gptransfer:mdw:gpadmin-[INFO]:-Retrieving source tables...
20170615:22:30:33:261818 gptransfer:mdw:gpadmin-[INFO]:-Checking for gptransfer schemas...
20170615:22:30:34:261818 gptransfer:mdw:gpadmin-[INFO]:-Retrieving list of destination tables...
20170615:22:30:34:261818 gptransfer:mdw:gpadmin-[INFO]:-Reading source host map file...
20170615:22:30:34:261818 gptransfer:mdw:gpadmin-[INFO]:-Building list of source tables to transfer...
20170615:22:30:34:261818 gptransfer:mdw:gpadmin-[INFO]:-Number of tables to transfer: 9032
20170615:22:30:34:261818 gptransfer:mdw:gpadmin-[INFO]:-gptransfer will use "standard" mode for transfer.
20170615:22:30:34:261818 gptransfer:mdw:gpadmin-[INFO]:-Validating source host map...
20170615:22:30:34:261818 gptransfer:mdw:gpadmin-[INFO]:-Validating transfer table set...
20170615:22:30:34:261818 gptransfer:mdw:gpadmin-[ERROR]:-Found unsupported identifiers
20170615:22:30:34:261818 gptransfer:mdw:gpadmin-[ERROR]:-Valid identifiers must start with a-z, or A-Z or underscore followed by a-z, or A-Z, or 0-9, or underscore
20170615:22:30:34:261818 gptransfer:mdw:gpadmin-[ERROR]:-A list of these tables has been written to the file failed_transfer_tables_20170615_223022.txt


It's by design that gptransfer can only accept object name which starts with a-z, or A-Z, or underscores, followed by lower or upper case (a-z, A-Z), or digits (0-9), or underscore (_). 

In this case character '$' is contained in the name of some tables, as shown below.

[PROD-gpadmin@mdw ~]$ head failed_transfer_tables_20170615_223022.txt 


Since gptransfer doesn't recognize object name which includes character '$', those objects should be renamed first to meet the criteria as mentioned above before starting gptransfer. Then rename those objects back to original one after gptransfer completes if necessary.



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