PostgreSQL Query Catalog

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Filter Queries

Found 1041 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
661 Perhaps a too long PL/pgSQL routine A large routine may have multiple tasks that should be split between multiple routines, each of which has a more focused task. Find the PL/pgSQL routines where the number of physical lines of code is bigger than 40. Problem detection INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
662 Perhaps a too long SQL routine A large routine may have multiple tasks that should be split between multiple routines that have a more focused task. Find the SQL routines where the number of statements (logical lines of code) is bigger than 5. Problem detection INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
663 Perhaps a too simplified state machine Find base table columns with Boolean type that name refers to the possibility that these are used to register as to whether an entity is currently in active state or not. Find the base tables that have exactly one Boolean column. During the system design one should find all the possible states of an entity type that influence the behavior of the information system. Data as to whether an entity is in one of these states should be in the database. Having only two states - active/inactive - is sometimes a too big simplification. Problem detection INFORMATION_SCHEMA only 2025-11-07 10:11 MIT License View
664 Perhaps a unneccessary surrogate key Find base tables that have the primary key that is not a surrogate key and an alternate key that is a surrogate key. Perhaps the surrogate key column is not needed. Problem detection INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
665 Perhaps brackets are missing in a regular expression that uses OR logical operation Find regular expressions where choice between alternatives has no brackets. Thus, instead of '(a|b|c)' there is 'a|b|c'. An example: '^a|b|c$' -permits in the string symbol "|" but '^(a|b|c)$' does not permit in the string symbol "|". Problem detection INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
666 Perhaps check constraint names contain incorrect or unnecessary words Find names of check constraints (either associated with a base table or a domain) that names contain words that are not needed in the name. For instance, constraints cannot ensure the correctness of data and thus the word correct should not be used in the names. Words like "valid" or phrases like "follows_rules" are just noise because all the constraint ensure that the registered data values are valid and follow certain rules. Problem detection INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
667 Perhaps checking of file extension is incorrect Find check constraints of tables that use a regular expression to check as to whether a registered string ends with an appropriate file extension. However, the expression does not put the dot sign into the square brackets nor does have the escape character \before it, i.e., it is interpreted as a single character not as the dot sign in the expression. In regular expressions the dot (.) matches any single character except the newline character. Problem detection INFORMATION_SCHEMA only 2025-11-07 10:11 MIT License View
668 Perhaps CHECK should be associated with a domain Find cases where multiple columns with the same domain have exactly the same CHECK constraint that is directly associated with the table. Problem detection INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
669 Perhaps Count(*) is wrongly used Find user-defined routines and derived tables (views/materialized views) that have a subquery that invokes Count aggregate function like this - Count(*), uses outer join, and grouping. In case of grouping you do not want to get an answer that an empty group contains one member. Problem detection INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
670 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 2025-11-07 10:11 MIT License View
671 Perhaps excessive privileges to use base tables Find excessive privileges to use base tabes (for others than the owner of the base table). The excessive privileges are all that are not SELECT, INSERT, UPDATE, DELETE. Problem detection INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
672 Perhaps excessive privileges to use views Find non-SELECT privileges to use views (for others than the owner of the view). Perhaps there should be only the privilege to make queries (SELECT statements based on the views) and data modification takes place by using routines. REFERENCES and TRIGGER privileges are definitely not needed. Problem detection INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
673 Perhaps inconsistent use of temporal functions Find routines that use temporal functions CURRENT_TIMESTAMP, LOCALTIMESTAMP, or now() that is inconsistent with the default values of the columns that are used by the routine, e.g., function uses a column with the default value LOCALTIMESTAMP but the routine uses function CURRENT_TIMESTAMP or now(). Problem detection INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
674 Perhaps inconsistent use of temporal functions (2) Find as to whether in the same database more than one of these functions is used at the same time - now(), localtimestamp, current_timestamp. Problem detection INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
675 Perhaps incorrect check of permitted temporal values This query identifies potentially flawed CHECK constraints on columns of type timestamp or a timestamp range (e.g., tstzrange, daterange). It targets range checks where the upper bound of the value or the range is defined using an inclusive operator (<=). This is a common source of bugs, as a condition like column <= '2025-12-31' or UPPER(column) <= '2025-12-31' is interpreted as being up to 00:00:00 on that day, inadvertently excluding the entire last day of the intended period. The more robust pattern is to use an exclusive upper bound, such as column < '2026-01-01'. Problem detection INFORMATION_SCHEMA+system catalog base tables 2025-11-07 12:43 MIT License View
676 Perhaps incorrect column name (based on default values) This query identifies a semantic mismatch between column definitions and their identifiers. It flags base table columns that are configured with a DEFAULT value of CURRENT_USER or SESSION_USER (indicating they store user identity) but whose names fail to reflect this purpose. Specifically, it searches for columns lacking semantic cues such as "user", "login", "owner", or "by" in their names. This obscuration reduces schema self-documentation, as developers cannot intuitively determine that the column is intended for audit or ownership tracking. Problem detection INFORMATION_SCHEMA only 2025-12-14 13:09 MIT License View
677 Perhaps incorrect default vale Find columns of base tables that have default value CURRENT_USER. Problem detection INFORMATION_SCHEMA only 2025-11-07 10:11 MIT License View
678 Perhaps incorrect use of 'NULL' Find Boolean expressions, queries, routines, and default values that refer to value 'NULL'. Perhaps NULL was intended instead. 'NULL' is a string (a value) but NULL is a special marker for denoting missing value. Problem detection INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
679 Perhaps incorrect WHEN clause Find row level triggers that have action condition (WHEN clause) but the Boolean expression in its specifications does not refer to neither NEW nor OLD variable. Problem detection INFORMATION_SCHEMA only 2025-11-07 10:11 MIT License View
680 Perhaps is not snake_case - Boolean-indicating prefix without underscore This query identifies database identifiers (types, domains, columns, parameters) that likely violate the snake_case naming convention. It operates on a specific heuristic, flagging any name that begins with a common predicate prefix (is, has, on) but is not immediately followed by an underscore. This pattern is a strong indicator of camelCase (e.g., isActive) or PascalCase (e.g., IsActive) usage, both of which should be refactored to snake_case (e.g., is_active) to maintain a consistent and readable schema. Problem detection INFORMATION_SCHEMA+system catalog base tables 2025-11-13 14:01 MIT License View