Query goal: | Find table columns with timestamp/date types that data type and dynamically found default value have a different type. |
Notes about the query: | The query finds default values that are associated directly with a base table column as well as default values that are specified through a domain. The query does not find default values of domains that are not associated with any table. |
Query type: | Problem detection (Each row in the result could represent a flaw in the design) |
Query reliability: | Medium (Medium number of false-positive results) |
Query license: | MIT License |
Fixing suggestion: | Change the default value or the data type of the column. |
Data source: | INFORMATION_SCHEMA only |
SQL query: | Click on query to copy it
WITH temp_col AS (SELECT c.table_schema, t.table_type, c.table_name, c.column_name, c.ordinal_position, c.data_type, coalesce(column_default, domain_default) AS def FROM INFORMATION_SCHEMA.columns AS c LEFT JOIN INFORMATION_SCHEMA.domains AS d USING (domain_schema, domain_name) INNER JOIN INFORMATION_SCHEMA.tables AS t USING (table_schema, table_name) WHERE c.data_type IN ('date', 'timestamp without time zone', 'timestamp with time zone') AND table_schema NOT IN (SELECT schema_name FROM INFORMATION_SCHEMA.schemata WHERE schema_name<>'public' AND schema_owner='postgres' AND schema_name IS NOT NULL)) SELECT table_schema, table_type, table_name, column_name, data_type, def FROM temp_col WHERE (def ~* '^LOCALTIMESTAMP' AND data_type<>'timestamp without time zone') OR ((def ~* '^(CURRENT_TIMESTAMP|CLOCK_TIMESTAMP|STATEMENT_TIMESTAMP|TRANSACTION_TIMESTAMP)' OR def='now()') AND data_type<>'timestamp with time zone') OR (def='CURRENT_DATE' AND data_type<>'date') ORDER BY table_schema, table_name, ordinal_position; |
Collection name | Collection description |
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Find problems about base tables | A selection of queries that return information about the data types, field sizes, default values as well as general structure of base tables. Contains all the types of queries - problem detection, software measure, and general overview |
Find problems automatically | Queries, that results point to problems in the database. Each query in the collection produces an initial assessment. However, a human reviewer has the final say as to whether there is a problem or not . |
Category name | Category description |
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Comfortability of data management | Queries of this category provide information about the means that have been used to make the use or management of database more comfortable and thus, more efficient. |
Data types | Queries of this category provide information about the data types and their usage. |
Default value | Queries of this catergory provide information about the use of default values. |
Inconsistencies | Queries of this catergory provide information about inconsistencies of solving the same problem in different places. |
System-defined functions | Queries of this category provide information about the use of system-defined functions. |
Temporal data | Queries of this category provide information about temporal (time-related) data that is kept in the database. |
Validity and completeness | Queries of this category provide information about whether database design represents the world (domain) correctly (validity) and whether database design captures all the information about the world (domain) that is correct and relevant (completeness). |
Reference |
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https://www.postgresql.org/docs/current/functions-datetime.html |