Filter Queries

Found 997 queries.

  • All the queries about database objects contain a subcondition to exclude from the result information about the system catalog.
  • Although the statements use SQL constructs (common table expressions; NOT in subqueries) that could cause performance problems in case of large datasets it shouldn't be a problem in case of relatively small amount of data, which is in the system catalog of a database.
  • Statistics about the catalog content and project home in GitHub that has additional information.

# Name Goal Type Data source Last update License
881 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 View
882 Median and average of the length of names of database objects by the 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. Find the median length and average (arithmetic mean) length of the names (identifiers) of user-defined database objects by the object type. The values could be used to compare different databases. Sofware measure INFORMATION_SCHEMA+system catalog base tables 2024-12-21 16:37 MIT License View
883 Median and average of the length of 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 length and average (arithmetic mean) length of the names (identifiers) 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 17:25 MIT License View
884 Frequent 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 names (identifiers) of user-defined database objects that occur at least twice as frequently as a name occurs in average. Also make sure that there is no duplication in play. Sofware measure INFORMATION_SCHEMA+system catalog base tables 2024-12-21 16:49 MIT License View
885 Frequent 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. Find the names (identifiers) of user-defined database objects that occur at least twice as frequently as a name occurs in average in case of the particular type of database objects. Also make sure that there is no duplication in play. Sofware measure INFORMATION_SCHEMA+system catalog base tables 2024-12-21 17:24 MIT License View
886 The number of names of database objects by the number of subcomponents in the names "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 number of names (identifiers) of user-defined database objects by the number of subcomponents in the names. The values could be used to compare different databases. Sofware measure INFORMATION_SCHEMA+system catalog base tables 2024-12-21 17:25 MIT License View
887 The shortest 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. Find the shortest (identifiers) names of user-defined objects by their type. These could be the first candidates of renaming in order to give to database objects better names. General INFORMATION_SCHEMA+system catalog base tables 2024-12-21 17:24 MIT License View
888 The longest 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. Find the TOP 3 longest (identifiers) names of user-defined objects by their type. These could be the first candidates of renaming in order to give to database objects better names. Sofware measure INFORMATION_SCHEMA+system catalog base tables 2024-12-21 16:37 MIT License View
889 Frequency of name components 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, what are the most popular components of the names (identifiers) of user-defined database objects, assuming, that the separator of the components is "_". Sofware measure INFORMATION_SCHEMA+system catalog base tables 2024-12-21 16:50 MIT License View
890 Using unreserved (in PostgreSQL) SQL keywords as the names of a database object (aggregate view) "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 not cause confusion. Find the distinct names (identifiers) of user-defined objects that are SQL keywords that are completely unreserved in PostgreSQL. In PostgreSQL "there are several different classes of tokens ranging from those that can never be used as an identifier to those that have absolutely no special status in the parser as compared to an ordinary identifier. " (PostgreSQL manual) Although the names are unreserved keywords in PostgreSQL these could be reserved keywords in other systems, which would complicate database migration. Moreover, such identifiers are often too general, i.e., do not provide enough information about the named object. Problem detection INFORMATION_SCHEMA+system catalog base tables 2024-12-21 17:17 MIT License View
891 Using in some way reserved (in PostgreSQL) SQL keywords as the names of a database object (aggregate view) "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 not cause confusion. Find the distinct names (identifiers) of user-defined objects that are SQL keywords that are not completely unreserved in PostgreSQL, i.e., these either never cannot be used as regular identifiers or cannot be used in case of some type of database objects. In PostgreSQL "there are several different classes of tokens ranging from those that can never be used as an identifier to those that have absolutely no special status in the parser as compared to an ordinary identifier. " (PostgreSQL manual) Moreover, such identifiers are often too general, i.e., do not provide enough information about the named object. Problem detection INFORMATION_SCHEMA+system catalog base tables 2024-12-21 17:17 MIT License View
892 Using unreserved (in PostgreSQL) SQL keywords as the names of a database object (detailed view) "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 not cause confusion. Find the names (identifiers) of user-defined objects that are SQL keywords that are completely unreserved in PostgreSQL. In PostgreSQL "there are several different classes of tokens ranging from those that can never be used as an identifier to those that have absolutely no special status in the parser as compared to an ordinary identifier. " (PostgreSQL manual) Although the names are unreserved keywords in PostgreSQL these could be reserved keywords in other systems, which would complicate database migration. Moreover, such identifiers are often too general, i.e., do not provide enough information about the named object. Think as to whether some better name would be possible. Problem detection INFORMATION_SCHEMA+system catalog base tables 2024-12-21 17:17 MIT License View
893 Using in some way reserved (in PostgreSQL) SQL keywords as the names of a database object (detailed view) "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 not cause confusion. Find the names (identifiers) of user-defined objects that are SQL keywords that are not completely unreserved in PostgreSQL, i.e., these either never cannot be used as regular identifiers or cannot be used in case of some type of database objects. In PostgreSQL "there are several different classes of tokens ranging from those that can never be used as an identifier to those that have absolutely no special status in the parser as compared to an ordinary identifier. " (PostgreSQL manual) Moreover, such identifiers are often too general, i.e., do not provide enough information about the named object. Problem detection INFORMATION_SCHEMA+system catalog base tables 2024-12-21 17:21 MIT License View
894 Too short 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) The names should be meaningful and searchable. Find the names (identifiers) of user-defined database objects that are shorter than three characters. Problem detection INFORMATION_SCHEMA+system catalog base tables 2024-12-21 17:27 MIT License View
895 Names of database objects that are used to manage the state of main objects in the database "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) The naming must be consistent. One should avoid mixing synonyms like "seisund", "staatus", and "olek" in Estonian or "state" and "status" in English and stick with one term. General INFORMATION_SCHEMA+system catalog base tables 2024-12-21 17:23 MIT License View
896 Inconsistent names of database objects that are used to manage the state of main objects in the database "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) The naming must be consistent. One should avoid mixing synonyms like "seisund", "staatus", and "olek" in Estonian or "state" and "status" in English and stick with one term. For instance, it is a bad practice to use word "state" in table names but word "status" in function names. Problem detection INFORMATION_SCHEMA+system catalog base tables 2024-12-21 16:24 MIT License View
897 Names of database objects with perhaps too many subcomponents (terms) "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) The number of subcomponents (terms) should not be too big. Find the names (identifiers) of user-defined database objects that perhaps contain too many subcomponents, assuming, that the separator of the components is "_". Problem detection INFORMATION_SCHEMA+system catalog base tables 2024-12-21 16:44 MIT License View
898 The number and percentage of different names of database objects Names should be expressive. Find the number of different names used in a database as well as the number of named database objects, and the percentage of different names from all the names. 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 and compare it with the total number of database objects. The values could be used to compare different databases. Sofware measure INFORMATION_SCHEMA+system catalog base tables 2024-12-21 17:26 MIT License View
899 Too short view names Names should be expressive. Find views that name is shorter than the average length of the the names of its directly underlying tables (both base tables and derived tables). Problem detection INFORMATION_SCHEMA only 2021-02-25 17:29 MIT License View
900 Inconsistency (code vs. id) of naming foreign key and referenced candidate key columns Naming of foreign key and referenced candidate key columns should be consistent. It cannot be so that in one table a value is labeled "id" like some surrogate key value and in another it "turns" into human-usable "code" or vice versa. An example:

Person(person_id, name)
Primary Key (person_id)

E_mail_address(e_mail_address_id, person_code, address)
Primary Key (e_mail_address_id)
Foreign key (person_code) References Person (person_id)
Problem detection system catalog base tables only 2021-02-25 17:30 MIT License View