PostgreSQL Query Catalog

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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
701 Perhaps USING syntax could be used for joining in the subqueries of derived tables Find derived tables that use newer join syntax where join conditions are written in the WHERE clause but do not use USING synatx. Problem detection INFORMATION_SCHEMA+system catalog base tables 2023-11-10 14:14 MIT License View
702 Permitting in a column only empty strings and strings that consist of whitespace characters Find table CHECK constraints that permit in a column only empty strings or strings that consist of only whitespace characters. Problem detection INFORMATION_SCHEMA only 2021-12-19 15:10 MIT License View
703 Personal names are unique Find all primary key and unique constraints of base tables that involve at least one column with personal names. Personal names are not unique and these cannot be (usually) used to guarantee uniqueness. Either one has declared a superkey instead of candidate key (i.e., the key contains a column that is not needed for uniqueness) or the key columns have been found incorrectly. Problem detection system catalog base tables only 2021-02-25 17:29 MIT License View
704 Phone number column has an incorrect data type Find the columns where the name reffers to the possibility that the column contains phone numbers but the type of the column is not VARCHAR or TEXT. Problem detection INFORMATION_SCHEMA only 2021-03-27 19:00 MIT License View
705 PL/pgSQL functions with consecutive RETURN clauses Find PL/pgSQL functions with consecutive RETURN clauses. Only the first RETURN will be used, others are unnecessary. Problem detection INFORMATION_SCHEMA+system catalog base tables 2021-12-16 11:38 MIT License View
706 PL/pgSQL functions without the RETURN clause The return value of a function cannot be left undefined. If control reaches the end of the top-level block of the function without hitting a RETURN statement, a run-time error will occur. This restriction does not apply to functions with output parameters and functions returning void, however. In those cases a RETURN statement is automatically executed if the top-level block finishes. It also does not apply to trigger functions that only task is to raise an exception. Problem detection INFORMATION_SCHEMA+system catalog base tables 2023-10-29 11:13 MIT License View
707 PL/pgSQL routine with plain SELECT Find PL/pgSQL that contain a SELECT statement that is not a SELECT … INTO statement. This is not permitted in PL/pgSQL routines. Problem detection INFORMATION_SCHEMA+system catalog base tables 2021-10-25 17:07 MIT License View
708 Pointlessly returned value The value that is returned by a function should depend on something. If you do not have anything meaningful to return (for instance, the function always returns true, false, NULL, or the same number), then write VOID instead of the return type. Problem detection INFORMATION_SCHEMA+system catalog base tables 2021-11-04 15:01 MIT License View
709 Potential duplication of sequence generators Do not create unnecessary sequence generators. Problem detection INFORMATION_SCHEMA only 2022-11-21 11:01 MIT License View
710 Potentially a classifier table is missing (based on field sizes) Find columns that are not covered by a primary key, unique, and foreign key constraint but have a textual type with the maximum field size 3 or less and where the column name does not refer to names or comments. Return only data about these columns where there is no table with a similar name. Return data only about tables that could be referenced from more than one table. Problem detection INFORMATION_SCHEMA+system catalog base tables 2021-03-18 20:08 MIT License View
711 Potentially missing default values of base table columns Find columns of base tables without a default value that are either Boolean columns that based on the name seem to implement a state machine or temporal columns that based on the name seem to keep registration or update time. These columns often have a default value. Problem detection INFORMATION_SCHEMA only 2023-11-15 17:03 MIT License View
712 Potentially missing PRIMARY KEY or UNIQUE constraints (based on column names) Find columns of base tables that name refers to the possibility that it contains unique values but the column does not belong to any PRIMARY KEY/UNIQUE constraint. If something has to be unique, then it must be said to the system so that it could use the information for internal optimizations and enforce the constraint. Problem detection INFORMATION_SCHEMA+system catalog base tables 2023-11-17 18:09 MIT License View
713 Potentially missing PRIMARY KEY or UNIQUE constraints (based on foreign keys) All the keys must be enforced. Find base tables that implement M:N relationship types and that allow multiple relationships of the same type between the same entities. Problem detection INFORMATION_SCHEMA+system catalog base tables 2021-02-25 17:29 MIT License View
714 Potentially missing PRIMARY KEY or UNIQUE constraints (based on sequence generators) Find columns of base tables that contain automatically generated unique values but do not belong to any PRIMARY KEY/UNIQUE constraint. If something has to be unique, then it must be said to the system so that it could use the information for internal optimizations and enforce the constraint. Problem detection INFORMATION_SCHEMA+system catalog base tables 2021-03-07 20:53 MIT License View
715 Potentially missing PRIMARY KEY or UNIQUE constraints (based on UUIDs) If something has to be unique, then it must be said to the system so that it could use the information for internal optimizations and enforce the constraint. Find columns that contain Universally Unique Identifiers but are not a part of any simple PRIMARY KEY/UNIQUE constraint and are also not part of a foreign key. Problem detection INFORMATION_SCHEMA+system catalog base tables 2022-11-03 11:18 MIT License View
716 Potentially missing sequence generators (based on column names and types) Find surrogate key columns that do not have an associated sequence generator. Surrogate key values must be generated by using the system (the sequence generator mechanism in case of PostgreSQL). If there are no sequence generators, then there is a question as to whether there are no surrogate keys in the database at all (could be possible and OK) or (more probable) developers have forgotten to implement the generation of surrogate keys. Problem detection INFORMATION_SCHEMA+system catalog base tables 2021-03-08 00:44 MIT License View
717 Potentially unnecessary use of sequence generators Find simple natural key columns that are associated with a sequence generator. Problem detection INFORMATION_SCHEMA+system catalog base tables 2021-03-07 21:06 MIT License View
718 Potentially unused sequence generators Find sequence generators that are not associated with any column through the default value mechanism. Please note, that it is also possible to refer to a sequence generator from a routine or from an application. If these are indeed not used, then these should be dropped, otherwise these are dead code. Problem detection INFORMATION_SCHEMA only 2021-03-07 20:56 MIT License View
719 Precise comparison with pattern matching in CHECK constraints Find CHECK constraints that use precise comparison (= or <>) with a regular expression or LIKE pattern. Problem detection INFORMATION_SCHEMA+system catalog base tables 2023-11-01 17:13 MIT License View
720 Precision of a timestamp or a time column is too big Find columns with a timestamp or a time type where the precision (the permitted maximum number of fractional sections) is bigger than the precision in the default value of the column. Problem detection INFORMATION_SCHEMA only 2023-11-02 17:29 MIT License View