Get column name length distribution in Vertica database

Query below returns distribution of column name lengths (number of characters).


select length(column_name) as col_name_length,
       count(*) as columns,
       count(distinct table_id) as tables
from v_catalog.columns
group by length(column_name)
order by col_name_length desc;


  • col_name_length - lenght in characters of column name
  • columns - number of columns with this length
  • tables - number of tables that have columns with this name length


  • One row represents one name lenght (number of characters)
  • Scope of rows: each column length that exists in a database
  • Ordered by length ascending (from 1 to max)

Sample results

Sample column name length distribution in VMart sample database.

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