GS_SPM_PLAN_HISTORY
GS_SPM_PLAN_HISTORY is a system catalog used to record plan change history. Users with SYSADMIN permissions can read the system catalog, but only the initial user can write data to the system catalog.
| Name | Type | Description |
|---|---|---|
| sql_hash | bigint | Unique ID of the SQL statement in the SPM. |
| plan_hash | bigint | Plan ID. |
| plan_hash_previous | bigint | ID of the previous plan. If there is no previous plan, the value is 0. |
| userid | oid | User who creates the change history. |
| creation_time | timestamp with time zone | Time when the change history is created. |