Potentially missing default values of base table columns

Query goal:

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.

Notes about the query:

The query considers both column names in Estonian and in English.

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

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
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 ='boolean'
AND (A.column_name~*'(accept|active|approve|change|clean|clear|close|create|delete|dirty|disable|enable|execute|hidden|inactive|lock|maile|modif|open|obsolete|on_hold|overlook|print|public|register|remove|restore|request|sent|submit|reject|update|use|valid|visible|withdraw)'
OR A.column_name~*'(aktiiv|avatud|eemalda|esita|kaivita|kinnita|kustuta|loo|lopeta|lukusta|meili|mitteaktiivne|nahtav|peata|peida|peidetud|prindi|puhas|registreeri|saada|saadetud|suletud|sulge|taasta|tyhista)'))
OR 
(A.data_type IN ('timestamp without time zone', 'timestamp with time zone', 'date','time without time zone', 'time with time zone') 
AND A.column_name~*'(reg|muutm|create|update|change)'))
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
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.
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.
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).

Category name

Category description

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.

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.

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).