PSQL table in Rails console

psql_table_like_rails_console.rb

results = ActiveRecord::Base.connection.execute("SELECT * FROM pg_statio_user_tables;").to_a
@columns = results.first.keys.each_with_object({}) do |col,h|
  h[col] = { col: col, width: [results.map { |g| g[col]&.size || 2 }.max, col.size].max }
end

def write_line(h)
  str = h.keys.map { |k| h[k].to_s.ljust(@columns[k][:width]) }.join(" | ")
  puts "| #{str} |"
end

def write_header
  puts "| #{ @columns.map { |_,g| g[:col].ljust(g[:width]) }.join(' | ') } |"
end

write_header
results.each{|a| write_line(a) }; nil

=begin
| relid    | schemaname | relname               | heap_blks_read | heap_blks_hit | idx_blks_read | idx_blks_hit | toast_blks_read | toast_blks_hit | tidx_blks_read | tidx_blks_hit |
| 16419    | public     | schema_migrations     | 101            | 68            | 67            | 62           | 0               | 0              | 1              | 0             |
# more raws
=end