instance method schema_collation

# File activerecord/lib/active_record/connection_adapters/mysql/schema_dumper.rb, line 44
        def schema_collation(column)
          if column.collation && table_name = column.table_name
            @table_collation_cache ||= {}
            @table_collation_cache[table_name] ||= select_one("SHOW TABLE STATUS LIKE '#{table_name}'")["Collation"]
            column.collation.inspect if column.collation != @table_collation_cache[table_name]
          end
        end