The system table for system tables

SarahLSarahL Administrator, Moderator, Employee, Registered User, VerticaExpert, CABuser

Most of you probably know that Vertica provides system tables that allow you to monitor

• System resources
• Background processes
• Workload
• Performance
• Catalog size

These tables help you to profile, diagnose, and view historical data equivalent to load streams, query profiles, Tuple Mover operations. For detailed information, see Using System Tables.

But do you know that there’s a system table that contains information about all of Vertica’s system tables? Of course, the name of the table is SYSTEM_TABLES.

Here’s what you might see if you query the SYSTEM_TABLES system table:

=> SELECT * FROM SYSTEM_TABLES
...
-[ RECORD 3 ]-----------------+----------------------------
table_schema_id               | 8301
table_schema                  | v_catalog
table_id                      | 10318
table_name                    | node_subscription_change_phases
table_description             | Phases during subscription change execution
is_superuser_only             | f
is_monitorable                | t
is_accessible_during_lockdown | f
-[ RECORD 4 ]-----------------+-----------------------------
table_schema_id               | 8301
table_schema                  | v_catalog
table_id                      | 10230
table_name                    | storage_locations
table_description             | Storage Location Information
is_superuser_only             | f
is_monitorable                | t
is_accessible_during_lockdown | f
-[ RECORD 5 ]-----------------+-----------------------------
table_schema_id               | 8301
table_schema                  | v_catalog
table_id                      | 10336
table_name                    | log_tables
table_description             | Audit table accesses for all categories
is_superuser_only             | f
is_monitorable                | t
is_accessible_during_lockdown | f
..
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