This query returns columns in a database sorted by their name length.

Query

select c.column_name,
    length(c.column_name) as column_name_length,
    c.table_schema,
    c.table_name
from information_schema.columns c
inner join information_schema.tables t on t.table_schema = c.table_schema 
           and t.table_name = c.table_name
where t.table_schema not in ('information_schema', 'pg_catalog')
      and t.table_type = 'BASE TABLE'
order by column_name_length desc, 
         column_name;

Columns

• column_name - column name
• column_name_length - column name length
• table_schema - column table schema name
• table_name - column table name

Rows

• One row represents one column of each table in a database
• Scope of rows: each column that exists in a database
• Ordered by length descrending - from longest to shortest

Sample results