| 541 | Database connect privilege is missing | Find non-superusers who have a privilege to use a table or a routine but do not have the privilege to connect to the database. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2021-11-21 13:51 | MIT License | |
| 542 | Base table column of national identification numbers does not have a correct data type | Find non-textual base table columns that name refers to the possibility that these are used to register national identification numbers (personal codes). The codes can contain additional symbols to numbers. | Problem detection | INFORMATION_SCHEMA only | 2021-02-25 17:29 | MIT License | |
| 543 | Non-updatable views with DO INSTEAD NOTHING rules | Find non-updatable views that have a DO INSTEAD NOTHING rule. The rule is used to prevent updates. However, the view is aniway non-updatable. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2023-10-28 13:01 | MIT License | |
| 544 | 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 | |
| 545 | Perhaps unnecessay regular expression | Find occurrences of possibly pointless regular expressions - i.e., value contains zero or more symbols. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2024-12-27 18:37 | MIT License | |
| 546 | One-to-one relationships | Find one-to-one relationships between base tables. In this case the foreign key columns must have primary key or unique constraint. These tables could implement inheritance hierarchy that has been specified in the conceptual data model. | General | system catalog base tables only | 2023-01-06 13:39 | MIT License | |
| 547 | Optional base table columns that have a default value that is not the empty string | Find optiona base table columns that have a default value that is not the empty string. Such columns should be mandatory. | Problem detection | INFORMATION_SCHEMA only | 2021-02-25 17:29 | MIT License | |
| 548 | Optional base table columns | Find optional base table columns, i.e., columns that permit NULLs. Are you sure you want to allow NULLs in these columns? | General | INFORMATION_SCHEMA only | 2020-11-21 03:02 | MIT License | |
| 549 | Perhaps default value 'infinity' is missing | Find optional base table columns that have a timestamp type and do not have a default value. | Problem detection | INFORMATION_SCHEMA only | 2024-11-28 14:58 | MIT License | |
| 550 | Optional non-foreign key base table columns that participate in a UNIQUE constraint or index | Find optional base table columns that participate in a UNIQUE constraint or index but do not participate in a foreign key constraint. Each base table has one or more candidate keys. One of these is usually selected to be the primary key, other are called alternate keys. To enforce an alternate key one should define a UNIQUE constraint and determine that all the key columns are mandatory (NOT NULL) just like the primary key columns are mandatory. Make sure that the NOT NULL constraint is not missing on these columns. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2022-10-21 10:45 | MIT License | |
| 551 | Optional base table columns that participate in a UNIQUE constraint or index | Find optional base table columns that participate in a UNIQUE constraint or index. Each base table has one or more candidate keys. One of these is usually selected to be the primary key, other are called alternate keys. To enforce an alternate key one should define a UNIQUE constraint and determine that all the key columns are mandatory (NOT NULL) just like the primary key columns are mandatory. Make sure that the NOT NULL constraint is not missing on these columns. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2022-10-21 15:57 | MIT License | |
| 552 | Optional composite foreign keys that do not have MATCH FULL specified | Find optional composite foreign keys that do not have MATCH FULL specified. Without MATCH FULL the system will permit partial foreign key values | Problem detection | system catalog base tables only | 2021-02-25 17:29 | MIT License | |
| 553 | Very similar (but not equal) routine names | Find pairs of names of different types of routines that are very similar but not equal. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2024-11-30 12:09 | MIT License | |
| 554 | Very similar table names | Find pairs of names of different types of tables that are very similar or even equal. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2024-11-30 11:50 | MIT License | |
| 555 | Very similar domain names | Find pairs of names of domains that are very similar or even equal. | Problem detection | INFORMATION_SCHEMA only | 2024-11-30 12:07 | MIT License | |
| 556 | Duplicate non-fuction based unique indexes | Find pairs of non-function based unique indexes that cover the same set of columns. Include indexes that support a constraint (primary key, unique, exclude), i.e., these indexes have been automatically created due to the constraint declaration. For instance, it helps us to find unique indexes that have been defined to already unique columns. | Problem detection | system catalog base tables only | 2022-10-21 10:17 | MIT License | |
| 557 | Definition of a non-minimal superkey instead of a candidate key (based on unique indexes) | Find pairs of non-partial unique indexes where the columns of a index are a proper subset of the columns of another index. Include indexes that support a constraint (primary key, unique, exclude), i.e., these indexes have been automatically created due to the constraint declaration. Exclude the pairs where both participants have been created to support a constraint. Candidate key is a minimal superkey, meaning that it is not possible to remove columns from the candidate key without losing its uniqueness property. One should define keys based on candidate keys, i.e., the keys should not have redundancy in terms of columns. Defining a unique index essentially means defining a key in the table but it is done at the lower level of abstraction. | Problem detection | system catalog base tables only | 2022-10-21 15:56 | MIT License | |
| 558 | All short cycles (tables) | Find pairs of tables that have both a foreign key that references to the other table. Such cycles can involve more than two tables but the query detects only cycles with two tables. | General | INFORMATION_SCHEMA+system catalog base tables | 2021-11-27 20:54 | MIT License | |
| 559 | Short cycles (tables) | Find pairs of tables that have both a mandatory (NOT NULL) and not defrerrable foreign key that references to the other table. Such cycles can involve more than two tables but the query detects only cycles with two tables. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2021-11-27 20:52 | MIT License | |
| 560 | Too generic names (parameters) (there is a parameter with a more specific name in the routine) | Find parameter names in case of which the same routine has another parameter with the same mode but with more specific name, i.e., the name contains the parameter name in the end or in the beginning. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2023-12-06 12:03 | MIT License | |