Find columns of base tables that have type BOOLEAN. Based on column names these implement a state machine or record agreements. At the same time the columns do not have a default value. There are only two truth values - TRUE and FALSE - in case of two-valued logic. It should be possible to select one of these as the default value of the column.
Notes
The query takes into account both column names in Estonian and in English.
Type
Problem detection (Each row in the result could represent a flaw in the design)
SELECT c.table_schema, c.table_name, c.column_name
FROM information_schema.columns AS c LEFT JOIN information_schema.column_domain_usage cdc ON
c.table_schema=cdc.table_schema AND c.table_name=cdc.table_name AND c.column_name=cdc.column_name
LEFT JOIN information_schema.domains d ON cdc.domain_schema=d.domain_schema AND cdc.domain_name=d.domain_name
WHERE (c.table_schema, c.table_name) IN (SELECT table_schema, table_name
FROM INFORMATION_SCHEMA.tables WHERE table_type='BASE TABLE') AND
c.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)
AND c.data_type='boolean'
AND coalesce(c.column_default, domain_default) IS NULL
ORDER BY c.table_schema, c.table_name, c.ordinal_position;
SELECT c.table_schema, c.table_name, c.column_name
FROM information_schema.columns AS c LEFT JOIN information_schema.column_domain_usage cdc ON
c.table_schema=cdc.table_schema AND c.table_name=cdc.table_name AND c.column_name=cdc.column_name
LEFT JOIN information_schema.domains d ON cdc.domain_schema=d.domain_schema AND cdc.domain_name=d.domain_name
WHERE (c.table_schema, c.table_name) IN (SELECT table_schema, table_name
FROM INFORMATION_SCHEMA.tables WHERE table_type='BASE TABLE') AND
c.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)
AND c.data_type='boolean'
AND (c.column_name~*'(accept|active|agree|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 c.column_name~*'(aktiiv|avatud|eemalda|esita|kaivita|kinnita|kustuta|loo|lopeta|lukusta|meili|mitteaktiivne|nahtav|nous|peata|peida|peidetud|prindi|puhas|registreeri|saada|saadetud|suletud|sulge|taasta|tyhista)')
AND coalesce(c.column_default, domain_default) IS NULL
ORDER BY c.table_schema, c.table_name, c.ordinal_position;
Collections
This query belongs to the following collections:
Name
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
This query is classified under the following categories:
Name
Description
Boolean data
Queries of this category provide information about truth-values data that is kept in the database.
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.
State machine
Queries of this category provide information about registration of states of entities in a database.