Base table columns with one of the following types: BIGINT, INTEGER, TEXT, or VARCHAR without max character length

Query 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 about the query:

Query returns also information about columns that properties have been specified through a domain.

Query type:

General (Overview of some aspect of the database.)

Query license:

MIT License

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:

Click on query to copy it

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 where the query belongs to

Collection name	Collection description
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 .

Collection name

Collection description

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 .

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.

Category name

Category description

Data types

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

Reference materials for further reading

Reference
https://stackoverflow.com/questions/29560016/how-to-add-a-length-constraint-to-a-text-field

Reference

https://stackoverflow.com/questions/29560016/how-to-add-a-length-constraint-to-a-text-field