SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function concat (children 1)
     ExpressionList (children 5)
      Literal \'Column \'
      Identifier name
      Literal \' from table \'
      Function concat (children 1)
       ExpressionList (children 3)
        Identifier database
        Literal \'.\'
        Identifier table
      Literal \' should have a comment\'
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.columns
   Function and (children 1)
    ExpressionList (children 5)
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier database
       Literal \'system\'
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier comment
       Literal \'\'
     Function notILike (children 1)
      ExpressionList (children 2)
       Identifier table
       Literal \'%log%\'
     Function notIn (children 1)
      ExpressionList (children 2)
       Identifier table
       Literal Tuple_(\'numbers\', \'numbers_mt\', \'one\', \'generate_series\', \'generateSeries\', \'coverage_log\', \'filesystem_read_prefetches_log\', \'custom_metrics\', \'custom_metrics_refresher\', \'prometheus_metrics\', \'unicode\')
     Function notEquals (children 1)
      ExpressionList (children 2)
       Identifier default_kind
       Literal \'ALIAS\'
