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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;