The list of all the queries

CHECK constraint cardinality is zero

Query goal: Write correct constraints. Usually the constraint expression should refer to at least one column. A domain constraint expression should refer to the stub VALUE. For instance, the constraint CHECK(1=0) that is associated with a table T would prevent adding any rows to T. The value of the Boolean expression of this constraint is always FALSE.
Notes about the query: The query considers check constraints of all the domains, regardless of whether the domain is used do define a column in a base table or not.
Query type: Problem detection (Each row in the result could represent a flaw in the design)
Query reliability: High (Few or no false-positive results)
Query license: MIT License
Data source: INFORMATION_SCHEMA+system catalog
SQL query: Click on query to copy it

select 
n.nspname as schema,
c.relname || '.' || o.conname as name, 
substring(pg_get_constraintdef(o.oid),7) as expression,
'TABLE CHECK' AS type
from pg_constraint o inner join pg_class c on c.oid = o.conrelid
inner join pg_namespace n on n.oid=c.relnamespace
where o.contype ='c' 
and n.nspname not in (select schema_name
from information_schema.schemata
where schema_name<>'public' and
schema_owner='postgres' and schema_name is not null)
and conkey is null
union select n.nspname as schema,
t.typname || '.' || o.conname as name, 
substring(pg_get_constraintdef(o.oid),7) as expression,
'DOMAIN CHECK' AS type
from pg_constraint o inner join pg_type t on t.oid = o.contypid
inner join pg_namespace n on n.oid=t.typnamespace
where o.contype ='c' and n.nspname not in (select schema_name
from information_schema.schemata
where schema_name<>'public' and
schema_owner='postgres' and schema_name is not null)
and  substring(pg_get_constraintdef(o.oid),7) !~ '([(]VALUE|VALUE[)])'
order by type, schema, name;

Collections where the query belongs to

Collection nameCollection description
Find problems automaticallyQueries, 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 nameCategory description
CHECK constraintsQueries of this category provide information about CHECK constraints.
Fatal problemsQueries of this category provide information about problems that render a part of a database unusable.
StubsQueries of this catergory provide information about stubs (piece of code used to stand in for some other programming functionality).
Validity and completenessQueries 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).

The list of all the queries