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
421 Different tasks of rules Find different tasks that are solved by using rules, i.e., different rules on the same table or different tables that do the same thing are considered to solve one task. General system catalog base tables only 2025-11-07 10:11 MIT License View
422 Different tasks of triggers Find different tasks that are solved by using triggers, i.e., different triggers on the same table or different tables that do the same thing are considered to solve one task. General INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
423 Different ways how to find default timestamp values Find all the default values of base table, view, and foreign table columns that are expressions invoking a function that returns a timestamp. Do it only if there are different expressions, i.e., there could be possible inconsistencies. Problem detection INFORMATION_SCHEMA only 2025-11-07 10:11 MIT License View
424 Disabled rules Identify disabled rules. These should be enabled or dropped, otherwise these are dead code. Problem detection system catalog base tables only 2025-11-07 10:11 MIT License View
425 Disabled system triggers (i.e., disabled enforcement of constraints) These triggers should be enabled because otherwise some important functionality regarding constraints like enforcing referential integrity does not work. Problem detection system catalog base tables only 2025-11-07 10:11 MIT License View
426 Disabled user triggers Identify disabled triggers. These should be enabled or dropped, otherwise these are dead code. Problem detection system catalog base tables only 2025-11-07 10:11 MIT License View
427 Domain based on another domain Find domains that have been defined based on another domain. Do not specify domains based on existing domains. This would unnecessarily increase dependencies and complexity. Problem detection INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
428 Domain candidates Find column descriptions that are candidates for describing a domain. General INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
429 Domain CHECK constraints with the same name Find domain check constraint names that are used more than once (within the same schema or in different schemas). Different things should have different names. However, here different constraints have the same name. Also make sure that this is not a sign of duplication of domains. Problem detection INFORMATION_SCHEMA only 2025-11-07 10:11 MIT License View
430 Domain declares the same default value for multiple independent foreign keys Find domains that declare a default value and that are used in case of multiple foreign key constraints that point to different tables. Domains should be used in a manner that does not cause unnecessary coupling of concerns. For instance, let us assume that columns client_state_type_code of table Client (that is used to implement the relationship with table Client_state_type) and worker_state_type_code of table Worker (that is used to implement the relationship with table Worker_state_type) have been defined based on the same domain. It the domain has a default value, then it determines the initial state of both clients and workers. However, it must be possible to determine the initial state independently in case of clients and workers. Problem detection INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
431 Domain name and type name are the same Use different names to avoid confusion. Problem detection INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
432 Domain name contains base table name Find names of domains that contain the name of the table that column the domain specifies. Domains are reusable artifacts that one should be able to use in case of different base tables. Thus, it is inappropriate to use the name of a particular table in the name of the domain. Problem detection INFORMATION_SCHEMA only 2025-11-07 10:11 MIT License View
433 Domains that are associated with a sequence generator Domains are reusable artifacts. By associating a domain with a sequence generator, one essentially starts to share sequence generators between tables. It may cause a potential performance bottleneck by having a shared resource. By having a shared sequence it is not possible to change properties of sequences of different tables independently, i.e., it increases coupling between tables. Problem detection INFORMATION_SCHEMA only 2025-11-07 10:11 MIT License View
434 Domains with the same name in different schemas Domains are like words that can be used to construct generalized claims about the real world (table predicates). Better not to duplicate the words in the dictionary. Problem detection INFORMATION_SCHEMA only 2025-11-07 10:11 MIT License View
435 Domain usage in base tables Find for each domain the number of usages in base tables. The less you have managed to reuse domains in case of different columns, the more you have wasted your time by creating the domains. General INFORMATION_SCHEMA only 2025-11-07 10:11 MIT License View
436 Do not always depend on one's parent Find where a hierarchical structure is implemented in a base table by adding a foreign key that refers to a candidate key of the same table. General system catalog base tables only 2025-11-07 10:11 MIT License View
437 Do not always depend on one's parent - column names are ot sufficiently different Find where a hierarchical structure is implemented in a base table by adding a foreign key that refers to a candidate key of the same table. Find only cases where the candidate key and foreign key column names are very similar (Levenshtein distance shorter than four). Problem detection system catalog base tables only 2025-11-07 10:11 MIT License View
438 Do not always depend on one's parent (INFORMATION_SCHEMA) Find where a hierarchical structure is implemented in a base table by having a foreign key that refers to a candidate key of the same table. This design is called adjacency list. General INFORMATION_SCHEMA only 2025-11-07 10:11 MIT License View
439 Do not assume you must use files Find cases where you store images and other media as files outside the database and store in the database only paths to the files. Problem detection INFORMATION_SCHEMA only 2025-11-07 10:11 MIT License View
440 Do not assume you must use files (based on user data) Find cases where you store images and other media as files outside the database and store in the database only paths to the files. Problem detection INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View