PostgreSQL Query Catalog

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Filter Queries

Found 1050 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
941 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 2025-11-07 10:11 MIT License View
942 The size of base tables and their indexes Find the size of base tables without indexes, size of the indexes of the table, total size of the table (including its indexes) and percentage of the index size from the total size. If the size of indexes of a table is relatively high, then check as to whether all the indexes are needed. General system catalog base tables only 2025-11-07 10:11 MIT License View
943 The SQL-language routines with the body that is string literal Find SQL-language routines that have the body that is string literal, i.e., the body is not SQL-standard function body. Routines with a SQL-standard body are permitted starting from PostgreSQL 14. Problem detection INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
944 The storage size of each index (the system catalog excluded) Get overview of disk usage. Sofware measure system catalog base tables only 2025-11-07 10:11 MIT License View
945 The storage size of each schema data object (the system catalog excluded) Get overview of disk usage by different schema objects that contain user data. Sofware measure system catalog base tables only 2025-11-07 10:11 MIT License View
946 The storage size of each table (including indexes) (the system catalog excluded) Get overview of disk usage. Sofware measure system catalog base tables only 2025-11-07 10:11 MIT License View
947 The total number of physical lines of code in the bodies of user-defined SQL and PL/pgSQL functions/procedures Find a numerical measure that describes the extent of the database public interface (virtual data layer) through which users access the database. Sofware measure INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
948 The total size of all indexes (system catalog excluded) Sofware measure system catalog base tables only 2025-11-07 10:11 MIT License View
949 The total size of all tables (system catalog excluded) Sofware measure system catalog base tables only 2025-11-07 10:11 MIT License View
950 The total storage size of all indexes (the system catalog excluded) Get overview of disk usage. Sofware measure system catalog base tables only 2025-11-07 10:11 MIT License View
951 The total storage size of the database (the system catalog included) Get overview of disk usage. Sofware measure system catalog base tables only 2025-11-07 10:11 MIT License View
952 The usage of data type formatting functions Find expressions that use a data type formatting function - to_char, to_number, to_date, to_timestamp. General INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
953 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 2025-11-07 10:11 MIT License View
954 The use of xmin hidden column in views and routines Find the number of views and materialized views that have a column with the xid type and the number of routines that contain a UPDATE or a DELETE statement that search condition refers to the xmin column. If one uses optimistic approach for dealing with the concurrent modifications of data, then xmin values should be presented by views and used in routines that modify or delete rows. Sofware measure INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
955 Three-valued logic (Boolean columns) Find base table columns that have Boolean type and do not have NOT NULL constraint. Use two-valued logic (TRUE, FALSE) instead of three-valued logic (TRUE, FALSE, UNKNOWN). Because NULL in a Boolean column means unknown make all the Boolean columns mandatory. Problem detection INFORMATION_SCHEMA only 2025-11-07 10:11 MIT License View
956 Three-valued logic (non-Boolean columns) Find non-foreign key columns of base tables that probably (based on the column name) contain values that represent truth values but do not have NOT NULL constraint. Use two-valued logic (TRUE, FALSE) instead of three-valued logic (TRUE, FALSE, UNKNOWN). Because NULL in a Boolean column means unknown make all the columns mandatory. Problem detection INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
957 Too few rounds in case of calculating the hash Find user-defined routines where gen_salt function is used with the number of rounds that is smaller than 12. The number should be adjusted based on the hardware where the system resides. Password hashing should take at least 250 ms. Problem detection INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
958 Too generic names (candidate key columns) Find candidate key columns with the names like id, identifikaator, code, kood, number, etc. The names should have a prefix or a suffix. These are too generic names. Problem detection system catalog base tables only 2025-11-07 10:11 MIT License View
959 Too generic names (columns) (there is a column with a more specific name in the table) Find column names in case of which the same table has another column (with more specific name) that name contains the column name in the end or in the beginning. For instance, a base table has columns parent and root_parent and the former col-umn name is too generic, i.e., it should be more specific. Problem detection INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
960 Too generic names (domain constraints) Find domain CHECK constraints that have a too generic name - for instance, the name contains word "data" ) or the name is an abbreviation of the constraint type name (for instance, "chk" or "chk1"). Problem detection INFORMATION_SCHEMA only 2025-11-07 10:11 MIT License View