Inconsistent time zone and precision usage in case of registering times

Query goal:

Find as to whether different data types (with and without timezone) and precisions are used in case of registering times in different columns.

Notes about the query:

In case of the string_agg function, the line break (br) tag is used as a part of the separator for the better readability in case the query result is displayed in a web browser.

Query type:

Problem detection (Each row in the result could represent a flaw in the design)

Query reliability:

Low (Many false-positive results)

Query license:

MIT License

Data source:

INFORMATION_SCHEMA only

SQL query:

Click on query to copy it

WITH num_cols AS (SELECT table_schema, table_name, column_name, ordinal_position, 
CASE WHEN datetime_precision IS NOT NULL THEN data_type || '(' || datetime_precision || ')'
ELSE data_type END AS data_type
FROM INFORMATION_SCHEMA.columns
WHERE data_type~*'time'
AND data_type!~*'timestamp'
AND (table_schema, table_name) IN (SELECT table_schema, table_name
FROM INFORMATION_SCHEMA.tables WHERE table_type='BASE TABLE') 
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 data_type, string_agg(table_schema || '.' || table_name || '.' || column_name, ',<br>' ORDER BY table_schema, table_name) AS tables, Count(*) AS number_of_columns
FROM num_cols
WHERE (SELECT Count(DISTINCT data_type) AS cnt FROM num_cols)>1
GROUP BY data_type
ORDER BY Count(*) DESC, data_type;

Collections where the query belongs to

Collection name	Collection 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 .

Collection name

Collection 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 where the query belongs to

Category name	Category description
Data types	Queries of this category provide information about the data types and their usage.
Inconsistencies	Queries of this catergory provide information about inconsistencies of solving the same problem in different places.
Temporal data	Queries of this category provide information about temporal (time-related) data that is kept in the database.

Category name

Category description

Data types

Queries of this category provide information about the data types and their usage.

Inconsistencies

Queries of this catergory provide information about inconsistencies of solving the same problem in different places.

Temporal data

Queries of this category provide information about temporal (time-related) data that is kept in the database.