Each column should have the most appropriate data type. Developers sometimes forget to use SMALLINT type even if it is logically the best choice. Developers also sometimes forget to use BOOLEAN type and instead invent something.
Notes
Query returns also information about columns that properties have been specified through a domain.
Type
General (Overview of some aspect of the database.)
SELECT table_schema, table_name, column_name, data_type
FROM INFORMATION_SCHEMA.columns
WHERE data_type IN ('smallint', 'boolean') 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:
Name
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
This query is classified under the following categories:
Name
Description
Boolean data
Queries of this category provide information about truth-values data that is kept in the database.
Data types
Queries of this category provide information about the data types and their usage.