Temporal function in a simple check constraint is inconsistent with the column type

WITH domains AS (
SELECT cdu.table_schema, cdu.table_name, cdu.column_name, (SELECT data_type FROM INFORMATION_SCHEMA.domains AS d
WHERE d.domain_schema=dc.domain_schema AND d.domain_name=dc.domain_name) AS data_type, cc.check_clause
FROM ((INFORMATION_SCHEMA.column_domain_usage AS cdu INNER JOIN
INFORMATION_SCHEMA.tables AS t USING (table_schema, table_name)) INNER JOIN INFORMATION_SCHEMA.domain_constraints AS dc
USING (domain_schema, domain_name)) INNER JOIN INFORMATION_SCHEMA.check_constraints AS cc
USING (constraint_catalog, constraint_schema, constraint_name)
WHERE t.table_type='BASE TABLE' AND cc.check_clause NOT LIKE '%IS NOT NULL'  AND 
cdu.table_schema NOT IN (SELECT schema_name
FROM INFORMATION_SCHEMA.schemata
WHERE schema_name<>'public' AND
schema_owner='postgres' AND catalog_name IS NOT NULL AND schema_name IS NOT NULL)),

temp_domains AS (SELECT table_schema, table_name, column_name, data_type, check_clause
FROM domains
WHERE data_type IN ('date','timestamp with time zone','timestamp without time zone')),

temp_simple_chk AS (SELECT 
(SELECT nspname FROM pg_namespace WHERE oid=c.relnamespace) AS table_schema,
c.relname as table_name, 
a.attname AS column_name,
t.typname AS data_type,
pg_get_constraintdef(o.oid) AS check_clause
FROM pg_constraint o INNER JOIN pg_class c ON c.oid = o.conrelid
INNER JOIN pg_attribute a ON a.attrelid = c.oid AND a.attnum = o.conkey[1] AND a.attisdropped = FALSE
INNER JOIN pg_type t ON a.atttypid=t.oid
WHERE cardinality(o.conkey)=1 AND o.contype = 'c' AND t.typname IN ('date', 'timestamp', 'timestamptz')
UNION SELECT table_schema, table_name, column_name, data_type, check_clause
FROM temp_domains)

SELECT table_schema, table_name, column_name, data_type, check_clause
FROM temp_simple_chk
WHERE  (data_type IN ('timestamp without time zone','timestamp') AND check_clause~*'(current_timestamp|now[(]|current_date)')
OR (data_type IN ('timestamp with time zone','timestamptz') AND check_clause~*'(localtimestamp|current_date)')
OR (data_type='date' AND check_clause~*'(current_timestamp|localtimestamp|now[(])')
ORDER BY table_schema, table_name, column_name;

Query goal:	Find base table columns with a check constraint that refers to a temporal function (current_timestamp, localtimestamp, current_date, or now) that return type is inconsistent with the data type of the column.
Notes about the query:	The query considers both check constraints that are directly associated with a table as well as check constraints that are associated with the table through a domain.
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:	Change the check constraint or the data type of the column. For instance, if column reg_time has type TIMESTAMP, then instead of reg_time <= CURRENT_TIMESTAMP or reg_time<=CURRENT_DATE, one should use cart_item_created_at <= LOCALTIMESTAMP.
Data source:	INFORMATION_SCHEMA+system catalog
SQL query:	Click on query to copy it WITH domains AS ( SELECT cdu.table_schema, cdu.table_name, cdu.column_name, (SELECT data_type FROM INFORMATION_SCHEMA.domains AS d WHERE d.domain_schema=dc.domain_schema AND d.domain_name=dc.domain_name) AS data_type, cc.check_clause FROM ((INFORMATION_SCHEMA.column_domain_usage AS cdu INNER JOIN INFORMATION_SCHEMA.tables AS t USING (table_schema, table_name)) INNER JOIN INFORMATION_SCHEMA.domain_constraints AS dc USING (domain_schema, domain_name)) INNER JOIN INFORMATION_SCHEMA.check_constraints AS cc USING (constraint_catalog, constraint_schema, constraint_name) WHERE t.table_type='BASE TABLE' AND cc.check_clause NOT LIKE '%IS NOT NULL' AND cdu.table_schema NOT IN (SELECT schema_name FROM INFORMATION_SCHEMA.schemata WHERE schema_name<>'public' AND schema_owner='postgres' AND catalog_name IS NOT NULL AND schema_name IS NOT NULL)), temp_domains AS (SELECT table_schema, table_name, column_name, data_type, check_clause FROM domains WHERE data_type IN ('date','timestamp with time zone','timestamp without time zone')), temp_simple_chk AS (SELECT (SELECT nspname FROM pg_namespace WHERE oid=c.relnamespace) AS table_schema, c.relname as table_name, a.attname AS column_name, t.typname AS data_type, pg_get_constraintdef(o.oid) AS check_clause FROM pg_constraint o INNER JOIN pg_class c ON c.oid = o.conrelid INNER JOIN pg_attribute a ON a.attrelid = c.oid AND a.attnum = o.conkey[1] AND a.attisdropped = FALSE INNER JOIN pg_type t ON a.atttypid=t.oid WHERE cardinality(o.conkey)=1 AND o.contype = 'c' AND t.typname IN ('date', 'timestamp', 'timestamptz') UNION SELECT table_schema, table_name, column_name, data_type, check_clause FROM temp_domains) SELECT table_schema, table_name, column_name, data_type, check_clause FROM temp_simple_chk WHERE (data_type IN ('timestamp without time zone','timestamp') AND check_clause~'(current_timestamp\|now[(]\|current_date)') OR (data_type IN ('timestamp with time zone','timestamptz') AND check_clause~'(localtimestamp\|current_date)') OR (data_type='date' AND check_clause~*'(current_timestamp\|localtimestamp\|now[(])') ORDER BY table_schema, table_name, column_name;

Category name	Category description
CHECK constraints	Queries of this category provide information about CHECK constraints.
Domains	Queries of this category provide information about reusable specifications of column properties.
Inconsistencies	Queries of this catergory provide information about inconsistencies of solving the same problem in different places.

Temporal function in a simple check constraint is inconsistent with the column type

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