The list of all the queries

Inconsistent field sizes of columns for addresses

Query goal: Find as to whether columns for holding e-mail addresses, phone numbers, ip addresses, zip codes, ordinary addresses, or file addresses have inconsistent field sizes across tables.
Notes about the query: The query considers both column names in English and Estonian. Missing field size, i.e., unilimited field size is considered as a separate field size.
Query type: Problem detection (Each row in the result could represent a flaw in the design)
Query reliability: Medium (Medium number of false-positive results)
Query license: MIT License
Fixing suggestion: If there are specific requirements that tell otherwise use consistent field sizes.
Data source: INFORMATION_SCHEMA only
SQL query: Click on query to copy it

WITH field_sizes AS (SELECT table_schema, table_name, column_name,  data_type, 
CASE WHEN data_type~*'(character varying|text)' AND character_maximum_length IS NULL THEN 'Unlimited'
ELSE character_maximum_length::text END AS character_maximum_length_for_count, character_maximum_length,
CASE WHEN column_name~*'(ip.*addr|ip.*aadr)' THEN 'ip'
WHEN column_name~*'(zip_)' THEN 'zip'
WHEN column_name~*'(phone|telef|tel_nr)' THEN 'phone'
WHEN column_name~*'e[_| ]*(mail|meil)' THEN 'mail'
WHEN column_name~*'(addr|aadr)' AND column_name!~*'(ip|phone|telef|tel_nr|mail|meil)' THEN 'address'
WHEN column_name~*'(path|tee)' AND column_name!~*'(url|http|ftp)' THEN 'path'
WHEN column_name~*'(url|http|ftp|veebileht|koduleht|homepage|webpage)' THEN 'URL'
ELSE 'other' END AS content_type
FROM INFORMATION_SCHEMA.columns
WHERE data_type~*'(char|text)' 
AND column_name~*'(zip_|ip.*addr|ip.*aadr|phone|telef|tel_nr|mail|meil|addr|aadr|path|tee|url|http|ftp|veebileht|koduleht|homepage|webpage)'
AND column_name!~*'(type|size|profile|prefix|suffix|tyyp|suurus|list|login|username|password|psswd|kasutajanimi|parool|salasona|shipping)'
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 content_type, Count(DISTINCT character_maximum_length_for_count) AS nr_of_different_sizes, 
Count(*) AS nr_of_columns,
string_agg(table_schema || '.' || table_name || '.' || column_name || ' ' ||  
CASE WHEN character_maximum_length IS NOT NULL THEN data_type  || '(' || character_maximum_length || ')' ELSE data_type END, ';<br>' ORDER BY character_maximum_length DESC NULLS FIRST, table_schema, table_name, column_name) AS columns
FROM field_sizes
GROUP BY content_type
HAVING Count(DISTINCT character_maximum_length)>1
ORDER BY Count(DISTINCT character_maximum_length) DESC, content_type;

Collections where the query belongs to

Collection nameCollection description
Find problems about base tablesA selection of queries that return information about the data types, field sizes, default values as well as general structure of base tables. Contains all the types of queries - problem detection, software measure, and general overview
Find problems automaticallyQueries, 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 nameCategory description
Field sizeQueries of this category provide information about the maximum size of values that can be recorded in column fields
InconsistenciesQueries of this catergory provide information about inconsistencies of solving the same problem in different places.
Result quality depends on namesQueries of this category use names (for instance, column names) to try to guess the meaning of a database object. Thus, the goodness of names determines the number of false positive and false negative results.

The list of all the queries