| 641 | A table has the same name as a routine | Find table names that are the same as some routine name. Use different names to avoid confusion. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2021-02-25 17:30 | MIT License | |
| 642 | Grantable table privileges | Find table privileges that the carrier of the privilege can in turn grant to others, i.e., the privileges have been given WITH GRANT OPTION. The number of privileges that can be passed on should be as small as possible. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2024-01-07 13:43 | MIT License | |
| 643 | Table, routine, and usage privileges that have been granted to a superuser | Find table, routine, and usage privileges that have been granted to a superuser. Superuser can do anything in the database and thus does not need the privileges. The result is a sign that perhaps the executed GRANT statements were incorrect (wrong username) or the grantee later got superuser status (that it shouldn't have). | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2021-02-25 17:30 | MIT License | |
| 644 | One true lookup table | Find tables that contain all (or most) of the classifier values and tables that refer to these. | Problem detection | system catalog base tables only | 2021-02-25 17:29 | MIT License | |
| 645 | Table has both state and status columns | Find tables that contain both a state and a status column. | General | INFORMATION_SCHEMA+system catalog base tables | 2023-01-14 15:26 | MIT License | |
| 646 | Table has multiple columns for free-form descriptions | Find tables that contain multiple columns for free-form textual descriptions. Make sure that the names of columns are understandable and sufficiently different. Make sure that there are no duplicate columns. | General | INFORMATION_SCHEMA+system catalog base tables | 2023-01-14 15:36 | MIT License | |
| 647 | Small tables | Find tables that have one column or zero columns. | General | INFORMATION_SCHEMA+system catalog base tables | 2021-03-07 10:52 | MIT License | |
| 648 | Name and description maximum length | Find tables where is both a column for registering name and description. Find the permitted maximum field size in these columns. Take into account that the maximum length may be controlled by using a CHECK constraint. Make sure that the permitted maximum field sizes are sufficiently different. | General | INFORMATION_SCHEMA+system catalog base tables | 2021-02-24 20:36 | MIT License | |
| 649 | Trigger is used to enforce referential integrity | Find tables where user-defined (non-system) triggers are used to implement referential integrity. In addition to table name show the triggers and the number of triggers. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2021-02-25 17:30 | MIT License | |
| 650 | Tables with the same name in different schemas | Find tables with the same name in different schemas. Make sure that this is not a duplication. | General | INFORMATION_SCHEMA+system catalog base tables | 2021-11-10 15:40 | MIT License | |
| 651 | Username is not unique | Find textual columns that potentially contain usernames (including columns that potentially contain e-mail addresses) that do not have a unique constraint or a unique index that involves only this column. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2021-02-25 17:29 | MIT License | |
| 652 | Base tables with the biggest number of rows | Find the base tables that belong to the top 5 in terms of the number of rows in the table. There should be test data in the tables. | General | system catalog base tables only | 2022-10-21 01:48 | MIT License | |
| 653 | Base tables where all the unique columns are optional | Find the base tables where all the unique columns are optional. In such tables there can be rows without values that identify these rows. In this case there can be rows in the table where the values that should identify the row are missing. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2022-10-21 01:47 | MIT License | |
| 654 | Different foreign key column names in case of referencing the same candidate key | Find the cases when the names of columns in different foreign keys that reference to the same candidate key are different. If different names reflect different roles, then it is legitimate. However, there could also be accidental differences that makes it more difficult to use the database. | Problem detection | system catalog base tables only | 2021-03-12 11:21 | MIT License | |
| 655 | Columns that have the same name as their domain/type | Find the columns that name is the same as the name of the type of the column or the domain of the column. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2022-11-30 13:04 | MIT License | |
| 656 | Phone number column has an incorrect data type | Find the columns where the name reffers to the possibility that the column contains phone numbers but the type of the column is not VARCHAR or TEXT. | Problem detection | INFORMATION_SCHEMA only | 2021-03-27 19:00 | MIT License | |
| 657 | Using system-defined names of constraints (constraints that involve more than one column) | Find the constraint types in case of which there exists system-defined names. | Problem detection | system catalog base tables only | 2023-01-10 14:53 | MIT License | |
| 658 | Using system-defined names of constraints (constraints that involve one column) | Find the constraint types in case of which there exists system-defined names. | Problem detection | system catalog base tables only | 2023-01-10 14:53 | MIT License | |
| 659 | Derived tables that have a column with the xid type | Find the derived tables (views and materialized views) that have a column with the xid type, i.e., these use the data from the hidden xmin column of a base table. If one uses optimistic approach for dealing with the concurrent data modifications, then xmin values should be presented by views and used in routines that modify or delete rows. | General | INFORMATION_SCHEMA+system catalog base tables | 2020-11-06 14:51 | MIT License | |
| 660 | Different non-surrogate key default values | Find the different default values that implement something other than a surrogate key. | General | INFORMATION_SCHEMA only | 2021-03-04 10:31 | MIT License | |