Use invocation of a precise function instead of casting in a default value expression

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WITH temp_col AS (SELECT c.table_schema, t.table_type, c.table_name, c.column_name, c.data_type, coalesce(column_default, domain_default) AS def
FROM INFORMATION_SCHEMA.columns AS c LEFT JOIN INFORMATION_SCHEMA.domains AS d USING (domain_schema, domain_name)
INNER JOIN INFORMATION_SCHEMA.tables AS t USING (table_schema, table_name)
WHERE c.data_type IN ('date', 'timestamp without time zone', 'timestamp with time zone') 
AND 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))
SELECT table_schema, table_type, table_name, column_name, data_type, def
FROM temp_col
WHERE def ~* '[(](now|localtimestamp|current_timestamp|current_date).*[)]::'
ORDER BY table_schema, table_name, column_name;