PostgreSQL Query Catalog

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Filter Queries

Found 1053 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
521 Foreign key references to a unique index columns not a unique key columns Find foreign key constraints that reference to the columns that are covered by a unique index not a unique key. Problem detection system catalog base tables only 2025-11-07 10:11 MIT License View
522 Foreign key refers to a table that has at least one subtable in the inheritance hierarchy Find foreign key constraints that refer to a base table that has at least one subtable in the inheritance hierarchy. Rows of the subtable do not belong to the supertable in terms of checking the referential integrity. Let us assume that there is a table T with a subtable Tsub. Let us also assume that table B has a foreign key that refers to the table T. If a row is inserted into Tsub, then this row cannot be referenced from B. Problem detection system catalog base tables only 2025-11-07 10:11 MIT License View
523 Foreign servers without user mappings Find foreign servers that do not have any associated user mappings. "A user mapping typically encapsulates connection information that a foreign-data wrapper uses together with the information encapsulated by a foreign server to access an external data resource." Problem detection INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
524 Frequency of column name lengths based on the table type Find in case of base tables, materialized views, and views the number of columns based on the length of the column name. Sofware measure INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
525 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 2025-11-07 10:11 MIT License View
526 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 2025-11-07 10:11 MIT License View
527 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 2025-11-07 10:11 MIT License View
528 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 2025-11-07 10:11 MIT License View
529 Full text search columns that have no gin or gist index Find columns of base tabels and materialized views with the type tsvector that do not have a gin or a gist index. These are the preferred index types for text search. Problem detection INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
530 Full text search columns with other type of index than gin or gist index Find columns of base tabels and materialized views with the type tsvector that do not have a gin or a gist index but have another type of index (e.g., b-tree). Gin and Gist are the preferred index types for text search. Problem detection INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
531 Function Upper or Lower is used in an index on a non-textual column Find function-based indexes that are based on function Upper or Lower but have been defined on a non-textual column. Such indexes support case insensitive search but in case of non-textual columns this does not have a meaning. Problem detection system catalog base tables only 2025-11-07 10:11 MIT License View
532 Generated stored base table columns Find generated stored columns in PostgreSQL base tables. The support of generated columns was added to PostgreSQL 12. These could be used to improve the performance of queries. General INFORMATION_SCHEMA only 2025-11-07 10:11 MIT License View
533 Generated stored base table columns duplicates another column in the table Find generated stored columns in PostgreSQL base tables that duplicate other columns in the table. Problem detection INFORMATION_SCHEMA only 2025-11-07 10:11 MIT License View
534 Generated stored base table columns that expression does not refer to any column Find generated stored base table columns that expression does not refer to any column of the table. It could be that there will be a constant value in every row in case of this column. The support of generated columns was added to PostgreSQL 12. Problem detection INFORMATION_SCHEMA only 2025-11-07 10:11 MIT License View
535 Grantable column privileges Find column privileges that the carrier of the privilege can in turn grant to others, i.e., the privileges have been given WITH GRANT OPTION. The number of privileges that can be passed on should be as small as possible. Problem detection INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
536 Grantable privileges on the database and its schemas, domains, types, languages, sequences, foreign data wrappers, and foreign servers Find privileges on the database and its schemas, domains, types, languages, sequences, foreign data wrappers, and foreign servers that the carrier of the privilege can in turn grant to others, i.e., the privileges have been given WITH GRANT OPTION. The number of privileges that can be passed on should be as small as possible. Problem detection system catalog base tables only 2025-11-07 10:11 MIT License View
537 Grantable roles Find roles that a member can grant to others, i.e., the role has been granted with ADMIN OPTION. The number of privileges that can be passed on should be as small as possible. Problem detection system catalog base tables only 2025-11-07 10:11 MIT License View
538 Grantable routine privileges Find routine privileges that the carrier of the privilege can in turn grant to others, i.e., the privileges have been given WITH GRANT OPTION. The number of privileges that can be passed on should be as small as possible. Problem detection INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
539 Grantable table privileges Find table privileges that the carrier of the privilege can in turn grant to others, i.e., the privileges have been given WITH GRANT OPTION. The number of privileges that can be passed on should be as small as possible. Problem detection INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View
540 Grantable usage privileges Find usage privileges that the carrier of the privilege can in turn grant to others, i.e., the privileges have been given WITH GRANT OPTION. The number of privileges that can be passed on should be as small as possible. Problem detection INFORMATION_SCHEMA+system catalog base tables 2025-11-07 10:11 MIT License View