| 521 | No point to have in a procedure COMMIT without ROLLBACK or vice versa | If you end transaction in a procedure, then there should be a possibility to either commit or rollback the transaction based on some condition. Procedures appeared in PostgreSQL 11. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2021-11-04 12:00 | MIT License | |
| 522 | Not equals check in unstandardized way | Find user-defined routines that use != operator to test as to whether two values are not equal. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2023-12-13 14:16 | MIT License | |
| 523 | Not inherited CHECK constraints | Find CHECK constraints that have been defined in a supertable (parent table) but not in its subtables. An entity that belongs to a subtype should also belong to its supertype. If a subtype entity satisfies some constraint, then logically it must also satisfy the constraints of the supertype as well. If CHECK constraints are not inherited, then this is not guaranteed. If you implement subtyping not merely reuse implementation in the subtables, then the subtables must have at least the same CHECK constraints as the supertable. CHECK(false) on a supertable is an appropriate CHECK constraint if one wants to prevent registering data directly to the supertable, i.e., data can only be added to the subtables. | General | system catalog base tables only | 2020-12-27 17:42 | MIT License | |
| 524 | Not inherited CHECK constraints that are recreated in the immediate subtable | Find base table CHECK constraints that have been defined as NOT INHERITED but the constraint with the same Boolean expression has been defined in the immediate subtable of the table. | Problem detection | system catalog base tables only | 2021-02-25 17:29 | MIT License | |
| 525 | Not inherited CHECK constraints that cover at least one column | Find CHECK constraints that cover at least one column and that have been defined in a supertable (parent table) but not in its subtables. An entity that belongs to a subtype should also belong to its supertype. If a subtype entity satisfies some constraint, then logically it must also satisfy the constraints of the supertype as well. If CHECK constraints are not inherited, then this is not guaranteed. If you implement subtyping not merely reuse implementation in the subtables, then the subtables must have at least the same CHECK constraints as the supertable. | Problem detection | system catalog base tables only | 2021-02-25 17:29 | MIT License | |
| 526 | NOT IN or <> ALL in derived tables | Avoid using NOT IN or <>ALL with a non-correlated subquery in PostgreSQL because the query performance will be very poor, especially in case of large data sizes. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2021-02-25 17:30 | MIT License | |
| 527 | NOT IN or <> ALL in routines | Avoid using NOT IN or <>ALL with a non-correlated subquery in PostgreSQL because the query performance will be very poor. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2021-10-25 16:42 | MIT License | |
| 528 | NOT NULL constraint is directly associated with a column instead of the domain of the column | Find mandatory (NOT NULL) base table columns that have been defined based on the same domain but the NOT NULL constraint is associated directly with the column not to the domain. PostgreSQL CREATE DOMAIN statement documentation points out that it is possible to add NULL's to columns that have a NOT NULL domain and thus suggests to associate NOT NULL constraints with a column instead of the domain. However, this is a non-standard behavior and defeats the idea of domain as a reusable asset. The scenarios where NULLs can appear in columns with a NOT NULL domain are quite exotic and probably cannot appear in production environments. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2023-10-20 15:34 | MIT License | |
| 529 | NOT NULL domains | Find domains with NOT NULL constraints and base table columns that have been defined based on the domain. PostgreSQL CREATE DOMAIN statement documentation points out that it is possible to add NULL's to columns that have a NOT NULL domain and thus suggests to associate NOT NULL constraints with a column instead of the domain. However, this is a non-standard behavior and defeats the idea of domain as a reusable asset. The scenarios where NULLs can appear in columns with a NOT NULL domain are quite exotic and probably cannot appear in production environments. | General | INFORMATION_SCHEMA+system catalog base tables | 2023-10-20 19:10 | MIT License | |
| 530 | NOT VALID foreign key constraints | Find not valid foreign key constraints. These constraints have been created so that the existing data has not been checked against the constraint. It could be deliberate in case of legacy systems that have data quality problems. However, ideally all the data in the table conforms to the constraint. | Problem detection | system catalog base tables only | 2021-02-25 17:30 | MIT License | |
| 531 | Number of columns covered with constraints | For different types of constraints find the number of columns covered with constraints of such type. | Sofware measure | INFORMATION_SCHEMA+system catalog base tables | 2021-10-16 11:01 | MIT License | |
| 532 | Number of derived tables that aggregate data | Find the number of derived tables that aggregate data. | Sofware measure | INFORMATION_SCHEMA+system catalog base tables | 2024-01-14 12:33 | MIT License | |
| 533 | Number of rows in base tables | Find the number of rows in base tables. | General | system catalog base tables only | 2022-10-27 19:44 | MIT License | |
| 534 | Number of system-generated and user-defined constraint names by constraint type (constraints that involve more than one column) | Find the number of system-generated constraint names by constraint type. Names should follow the same style. If there is a mix of system-generated and user-defined names, then the style is most probably different. | Sofware measure | system catalog base tables only | 2023-01-10 14:53 | MIT License | |
| 535 | Number of system-generated and user-defined constraint names by constraint type (constraints that involve one column) | Find the number of system-generated constraint names by constraint type. Names should follow the same style. If there is a mix of system-generated and user-defined names, then the style is most probably different. | Sofware measure | system catalog base tables only | 2023-01-10 14:52 | MIT License | |
| 536 | Number of tables covered by derived tables | Find the number of base tables, the number of base tables that are referred from at least one derived table (view or materialized view), the number of base tables that are referred from at least one view, and the number of base tables that are referred from at least one materialized view. If the database is used through the public database interface (virtual data layer), then, ideally, each table is referred from the subquery of at least one derived table. | Sofware measure | INFORMATION_SCHEMA+system catalog base tables | 2023-11-11 09:33 | MIT License | |
| 537 | Number of underlying tables of derived tables | Find for each view or materialized view the number of tables based on which the derived table has been directly defined. These tables could be base tables or derived tables. | Sofware measure | INFORMATION_SCHEMA+system catalog base tables | 2023-11-11 09:30 | MIT License | |
| 538 | Number of used tables | Find statistics about how many derived tables have how many different underlying tables. | Sofware measure | INFORMATION_SCHEMA+system catalog base tables | 2024-01-14 13:43 | MIT License | |
| 539 | Number of using views | Find statistics about how many base tables have how many derived tables that use these tables. | Sofware measure | INFORMATION_SCHEMA+system catalog base tables | 2024-01-14 13:42 | MIT License | |
| 540 | Number of views with and without security barrier | Find the number of views, the number of views with and without security barrier setting, and the names of views with and without the security barrier setting. | Sofware measure | INFORMATION_SCHEMA+system catalog base tables | 2024-01-14 12:54 | MIT License | |