Goal Each column should have the most appropriate data type. Developers sometimes misuse BIGINT, INTEGER, TEXT or VARCHAR type in places where a type that permits smaller values would be more appropriate and semantically descriptive.
Notes Query returns also information about columns that properties have been specified through a domain.
Type General Overview of some aspect of the database.
License MIT (opens in new tab)
Fixing Suggestion Change the data type or field size. If the type was selected with a perspective that values in the column will become quite big over time, then consider adding a CHECK constraint that further limits the values in the column.
Data Source INFORMATION_SCHEMA only
SQL Query 
SELECT table_schema, table_name, column_name, data_type
FROM INFORMATION_SCHEMA.columns
WHERE (data_type IN ('bigint', 'integer', 'text') OR (data_type='character varying' AND character_maximum_length IS NULL)) 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)
ORDER BY data_type, table_schema, table_name, ordinal_position;

Collections

This query belongs to the following collections:

Find problems by overview

Queries that results point to different aspects of database that might have problems. A human reviewer has to decide based on the results as to whether there are problems or not .

NameDescription
Find problems by overviewQueries that results point to different aspects of database that might have problems. A human reviewer has to decide based on the results as to whether there are problems or not .

Categories

This query is classified under the following categories:

Data types

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

NameDescription
Data typesQueries of this category provide information about the data types and their usage.