Find columns of base tables that name and type suggest that the column should contain the row registration time or last modify time but the column does not have a default value.
Notes
The query considers both column names in English and Estonian.
Type
Problem detection (Each row in the result could represent a flaw in the design)
Add a default value to the column that invokes a function that returns current timestamp.
Data Source
INFORMATION_SCHEMA only
SQL Query
SELECT A.table_schema, A.table_name , A.column_name, A.data_type, A.is_nullable
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
LEFT JOIN information_schema.domains D USING (domain_schema, domain_name)
WHERE domain_default IS NULL AND column_default IS NULL
AND A.data_type~*'(date|timestamp)'
AND (A.column_name~*'(registr|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, ordinal_position;
Collections
This query belongs to the following collections:
Name
Description
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 .
Categories
This query is classified under the following categories:
Name
Description
Default value
Queries of this catergory provide information about the use of default values.
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.