| Seq nr | Name | Goal▲ | Type | Data source | Last update | License | ... |
|---|---|---|---|---|---|---|---|
| 861 | CHECK constraints on columns with temporal data | If your table contains columns with temporal data, then it will be appropriate to restrict the range of possible values in these columns because some of the values that belong to the type might not be appropriate (for instance, imagine a client who was born in 1100-12-03 or a contract that was registered in 3890-12-12- 12:45). If your table contains multiple columns with temporal data that denote events, then the rule about the order of the events must be enforced, if possible. | General | INFORMATION_SCHEMA only | 2023-12-25 12:37 | MIT License | |
| 862 | FOR UPDATE is not allowed with aggregate functions | Implement explicit locking correctly. Instead of writing, for instance, SELECT Count(*) AS cnt FROM person WHERE person_id=1 FOR UPDATE; one has to write SELECT person_id FROM person WHERE person_id=1 FOR UPDATE; | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2021-11-04 11:23 | MIT License | |
| 863 | Names of database objects that contain two or more consecutive underscores or spaces as separators of name components | Improve the readability of names. Find the names (identifiers) of user-defined database objects that contain two or more consecutive underscores or spaces that separate name components, i.e., these are not at the beginning and in the end of the name. Example of such names are person__id or "person id". Names with duplicate underscores use snake case style but duplication of underscores does not improve the usability of the name. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2024-12-21 17:22 | MIT License | |
| 864 | Names of database objects that start with an underscore | Improve the readability of names. Find the names (identifiers) of user-defined database objects that start with an underscore. This is not necessarily a mistake. For instance, parameter names could start with an underscore. On the other hand, it could be that the prefix is missing in the name. | General | INFORMATION_SCHEMA+system catalog base tables | 2024-12-21 17:23 | MIT License | |
| 865 | The usage of double vs singular underscores or spaces in names as separator of name components | Improve the readability of names. Find the number of names (identifiers) of user-defined database objects that contain two or more consecutive underscores or spaces as the separator of name components vs. the number of names that contain a single underscore or space to separate name components. Try to be consistent in the usage of underscores. | Sofware measure | INFORMATION_SCHEMA+system catalog base tables | 2024-12-21 17:16 | MIT License | |
| 866 | Inconsistent chain of relationships in terms of using ON UPDATE compensating action | In case of a chain of relationships between tables (where the primary key and the foreign key have the same columns) the use of ON UPDATE compensating action should be consistent. For instance, in the next example there is inconsistency, because if one changes the person_code in table Person, then the modification does not succeed because it does not cascade to the table Product. It is unclear as to whether it should be possible to change the person_code or not. Person (person_code, surname) Primary key (person_code) Worker(person_code) Primary key (person_code) Foreign key (person_code) References Person (person_code) ON UPDATE CASCADE Product(product_code, registrator) Primary key (product_code) Foreign key (registrator) References Worker (person_code) ON UPDATE NO ACTION | Problem detection | system catalog base tables only | 2024-11-28 12:43 | MIT License | |
| 867 | JSON type instead of JSONB type | "In general, most applications should prefer to store JSON data as jsonb, unless there are quite specialized needs, such as legacy assumptions about ordering of object keys." (https://www.postgresql.org/docs/current/datatype-json.html) | Problem detection | INFORMATION_SCHEMA only | 2021-02-25 17:30 | MIT License | |
| 868 | Initially deferred constraint triggers with unnecessary locking | Initially deferred constraint triggers do not need explicit statements for locking tables or rows. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2021-10-08 11:25 | MIT License | |
| 869 | Routines with INSERT statements that are sensitive towards the order of columns | INSERT statements shouldn't be sensitive towards the order of columns. If one changes the order of columns in a table then these statements must be rewritten. Otherwise the code will not work or works incorrectly. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2021-11-04 16:15 | MIT License | |
| 870 | Primary key columns are not the first in a table | In SQL tables each column has the ordinal position. Find all the base tables where the primary key columns are not the first in the table, i.e., there is at least one non-primary key column that comes before a primary key column. It is easier to grasp the primary key if its columns are the first in the table. It could be that a table inherits from an abstract table where no keys have been defined. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2021-10-16 10:33 | MIT License | |
| 871 | Routine body has keywords that are not in uppercase | Keywords in uppercase improve readability. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2023-12-24 17:06 | MIT License | |
| 872 | Extension routines that execution privilege has been granted to PUBLIC | Know the privileges that users have in your system. Probably all the database users do not need these privileges. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2021-02-25 17:30 | MIT License | |
| 873 | AND takes precedence over OR | Make sure that Boolean expressions take into account precedence rules of Boolean operators. AND operator has precedence over OR operator. | General | INFORMATION_SCHEMA+system catalog base tables | 2020-11-06 14:51 | MIT License | |
| 874 | Perhaps the precision in case of a base table column with NUMERIC/DECIMAL type is too small | Make sure that in case of using the type DECIMAL/NUMERIC as the type of a base table column the precision (the permitted number of digits in the number) is not too small. For instance, the biggest value in the type NUMERIC(1,1) is 0.9. | Problem detection | INFORMATION_SCHEMA only | 2021-02-25 17:29 | MIT License | |
| 875 | Overloading | Make sure that there is genuine overloading instead of duplication or dead code. "In some programming languages, function overloading or method overloading is the ability to create multiple functions of the same name with different implementations." (Wikipedia) In PostgreSQL one can do it automagically by having multiple routines with the same name but different parameters in the same schema. | General | INFORMATION_SCHEMA+system catalog base tables | 2021-12-20 11:40 | MIT License | |
| 876 | INFORMATION_SCHEMA is missing | Make sure that you do not drop INFORMATION_SCHEMA schema. In this case most of the design checking queries will not work. This schema automatically exists in all databases. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2022-12-07 19:07 | MIT License | |
| 877 | Routines with type casting | Make sure that your parameters have appropriate types in order to avoid unnecessary type casting. | General | INFORMATION_SCHEMA+system catalog base tables | 2024-12-19 11:02 | MIT License | |
| 878 | The number and percentage of different names of database objects by object type | "Names in software are 90 percent of what make software readable. You need to take the time to choose them wisely and keep them relevant. Names are too important to treat carelessly. Names should not cause confusion." (Robert C. Martin, Clean Code) Names should be expressive. Different objects should have different names. The smaller the percentage the less descriptive are the names in the database. Find the number of different names (identifiers) of user-defined database objects by the object type and compare it with the total number of database objects with this type. The values could be used to compare different databases. | Sofware measure | INFORMATION_SCHEMA+system catalog base tables | 2024-12-21 16:35 | MIT License | |
| 879 | Frequency of lengths of the names of database objects | "Names in software are 90 percent of what make software readable. You need to take the time to choose them wisely and keep them relevant. Names are too important to treat carelessly. Names should not cause confusion." (Robert C. Martin, Clean Code) Names should be expressive. Find how many names (identifiers) of database objects there are with different lengths. The values could be used to compare different databases. | Sofware measure | INFORMATION_SCHEMA+system catalog base tables | 2024-12-21 16:39 | MIT License | |
| 880 | Median and average number of subcomponents in the names of database objects | "Names in software are 90 percent of what make software readable. You need to take the time to choose them wisely and keep them relevant. Names are too important to treat carelessly. Names should not cause confusion." (Robert C. Martin, Clean Code) Names should be expressive. Find the median and average (arithmetic mean) number of subcomponents in the names of user-defined database objects. The values could be used to compare different databases. | Sofware measure | INFORMATION_SCHEMA+system catalog base tables | 2024-12-21 16:47 | MIT License |