gp_persistent_database_node

The gp_persistent_database_node table keeps track of the status of file system objects in relation to the transaction status of database objects. This information is used to make sure the state of the system catalogs and the file system files persisted to disk are synchronized.

Table 1. pg_catalog.gp_persistent_database_node

columntypereferencesdescription
tablespace_oidoidpg_tablespace.oidTable space object id.
database_oidoidpg_database.oidDatabase object id.
persistent_statesmallint 0 - free

1 - create pending

2 - created

3 - drop pending

4 - aborting create

5 - “Just in Time” create pending

6 - bulk load create pending

parent_xidinteger Global transaction id.
persistent_serial_numbigint Log sequence number position in the transaction log for a file block.
previous_free_tidtid Used by HAWQ to internally manage persistent representations of file system objects.