Registration/modification time is not mandatory

Query goal:

Find columns that contain registration or modification time but are optional.

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:

Declare NOT NULL constraint to the column. Modification time column should be mandatory and just like registration time column should have a default value that returns a current date or timestamp.

Data source:

INFORMATION_SCHEMA only

SQL query:

Click on query to copy it

SELECT A.table_schema, A.table_name , A.column_name, A.data_type
FROM information_schema.columns A
INNER JOIN information_schema.tables T USING (table_schema, table_name)
INNER JOIN information_schema.schemata S ON A.table_schema=S.schema_name
AND A.is_nullable='YES'
AND A.data_type~*'(date|timestamp)'
AND (A.column_name~*'(reg|creat|insert|loomise|lisamise)'
OR (A.column_name~*'(muutmis|update|change|modify)'
AND A.column_name!~*'(jargmine|next)'))
AND T.table_type='BASE TABLE'
AND (A.table_schema = 'public'
OR S.schema_owner<>'postgres')
ORDER BY table_schema, table_name, column_name;

Collections where the query belongs to

Collection name	Collection description
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 .

Collection name

Collection description

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 .

Categories where the query belongs to

Category name	Category description
Missing data	Queries of this category provide information about missing data (NULLs) in a database.
Result quality depends on names	Queries of this category use names (for instance, column names) to try to guess the meaning of a database object. Thus, the goodness of names determines the number of false positive and false negative results.
Temporal data	Queries of this category provide information about temporal (time-related) data that is kept in the database.

Category name

Category description

Missing data

Queries of this category provide information about missing data (NULLs) in a database.

Result quality depends on names

Queries of this category use names (for instance, column names) to try to guess the meaning of a database object. Thus, the goodness of names determines the number of false positive and false negative results.

Temporal data

Queries of this category provide information about temporal (time-related) data that is kept in the database.