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
261 Function in a function-based index of a column is different from the function that is used in the subquery of a derived table Find cases where the function of a function-based index of a column is different from the function that is used in the query in a derived table based on the column. Problem detection INFORMATION_SCHEMA+system catalog base tables 2021-02-25 17:29 MIT License View
262 Do not specify a list of values in a table column definition Find cases where the list of valid data values in the column is specified in the column definition (in addition to specifying the type of the column) by using, for instance, check constraints or enumerated types. The check constraint is either associated directly with a table or is associated with a domain. Problem detection INFORMATION_SCHEMA+system catalog base tables 2022-06-09 14:30 MIT License View
263 Do not use dual-purpose foreign keys Find cases where the same column of a base table T is used to record references to multiple base tables. In addition, one has to add additional column to T for holding metadata about the parent table, referenced by the current row. Problem detection INFORMATION_SCHEMA only 2021-03-07 10:56 MIT License View
264 Duplicate triggers Find cases where the same table has multiple triggers with the same type (row-level, statement-level) that react to the same event with the same WHEN condition and with the same way (by invoking the same function). Problem detection INFORMATION_SCHEMA+system catalog base tables 2021-02-25 17:30 MIT License View
265 Short cycle (columns) Find cases where two candidate keys of the same table that are also foreign keys reference to each other. Problem detection system catalog base tables only 2021-11-28 02:08 MIT License View
266 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 2021-03-27 16:55 MIT License View
267 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 2021-03-10 12:58 MIT License View
268 Perhaps too many subconditions in a CHECK constraint Find check constraints of base table and foreign table columns that are either associated with more than one column and have at least one AND operation or are associated with exactly one column and have two or more AND operations. Problem detection INFORMATION_SCHEMA only 2024-12-11 23:29 MIT License View
269 Table columns with NOT VALID CHECK constraints Find CHECK constraints of base table and foreign table columns that are not valid. These constraints have been created so that the existing data has not been checked against the constraint. It could be deliberate in case of legacy systems that have data quality problems. However, ideally all the data in the table conforms to the constraint. Problem detection INFORMATION_SCHEMA only 2021-02-25 17:29 MIT License View
270 CHECK constraints that perhaps do not consider 'infinity' and '-infinity' special values Find check constraints of base tables that cover exactly one column where the default value of the column is special value 'infinity' or '-infinity'. Find only such constraints that probably check a range of permitted values but do not consider that one of the values might be 'infinity' or '-infinity'. Such special values belong to the types DATE, TIMESTAMP, NUMERIC, REAL, and DOUBLE PRECISION. Problem detection INFORMATION_SCHEMA+system catalog base tables 2024-05-08 18:58 MIT License View
271 The expression of a check constraint that is associated with a domain needs type conversion Find check constraints of domains where the Boolean expression invokes an operation that does not match with the data type of the domain. Problem detection INFORMATION_SCHEMA only 2021-02-25 17:29 MIT License View
272 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 2023-11-08 15:29 MIT License View
273 Cannot register all legal e-mail addresses Find CHECK constraints on base table or foreign table columns that contain data about e-mail addresses and apply unnecessary restrictions to the these, rejecting potentially some legal addresses. More precisely, find CHECK constraints that prevent registration of e-mail addresses with multiple @ signs. Problem detection INFORMATION_SCHEMA+system catalog base tables 2021-02-25 17:29 MIT License View
274 Cannot register all legal personal names Find CHECK constraints on base table or foreign table columns that contain data about personal names and apply unnecessary restrictions to the names, rejecting potentially some legal names. Find checks that prohibit a digit or require a letter A-Z. Problem detection INFORMATION_SCHEMA+system catalog base tables 2021-02-25 17:29 MIT License View
275 CHECK constraints on columns with personal names Find CHECK constraints on base table or foreign table columns that contain data about personal names. Make sure that the constraints do not restrict registration of legal names. General INFORMATION_SCHEMA only 2023-12-25 12:51 MIT License View
276 Not inherited CHECK constraints that cover at least one column Find CHECK constraints that cover at least one column and that have been defined in a supertable (parent table) but not in its subtables. An entity that belongs to a subtype should also belong to its supertype. If a subtype entity satisfies some constraint, then logically it must also satisfy the constraints of the supertype as well. If CHECK constraints are not inherited, then this is not guaranteed. If you implement subtyping not merely reuse implementation in the subtables, then the subtables must have at least the same CHECK constraints as the supertable. Problem detection system catalog base tables only 2021-02-25 17:29 MIT License View
277 Not inherited CHECK constraints Find CHECK constraints that have been defined in a supertable (parent table) but not in its subtables. An entity that belongs to a subtype should also belong to its supertype. If a subtype entity satisfies some constraint, then logically it must also satisfy the constraints of the supertype as well. If CHECK constraints are not inherited, then this is not guaranteed. If you implement subtyping not merely reuse implementation in the subtables, then the subtables must have at least the same CHECK constraints as the supertable. CHECK(false) on a supertable is an appropriate CHECK constraint if one wants to prevent registering data directly to the supertable, i.e., data can only be added to the subtables. General system catalog base tables only 2020-12-27 17:42 MIT License View
278 CHECK constraints on columns with Boolean data Find check constraints that involve columns with the type Boolean. General INFORMATION_SCHEMA only 2020-12-27 15:09 MIT License View
279 The expression of a simple check constraint that is associated directly with a column needs type conversion Find check constraints that involve one column and are associated directly with a table where the Boolean expression invokes an operation that does not match with the data type of the column. Problem detection INFORMATION_SCHEMA+system catalog base tables 2021-02-25 17:29 MIT License View
280 Multicolumn CHECK constraints with with inconsistent Boolean expressions Find CHECK constraints that involve two columns, i.e., the cardinality of the constraint is 2, the columns have the same name in different tables, and the Boolean expressions of these constraints are different. For instance, in one table it is last_change_time>=reg_time and in another table it is not (reg_time>last_change_time). Problem detection system catalog base tables only 2024-11-30 10:46 MIT License View