SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 2)
    Function arrayElement (alias table) (children 1)
     ExpressionList (children 2)
      Function splitByChar (children 1)
       ExpressionList (children 2)
        Literal \'.\'
        Function arrayElement (children 1)
         ExpressionList (children 2)
          Identifier tables
          Literal UInt64_1
      Literal UInt64_2
    Function greater (children 1)
     ExpressionList (children 2)
      Function arrayElement (children 1)
       ExpressionList (children 2)
        Identifier ProfileEvents
        Literal \'AggregationOptimizedEqualRangesOfKeys\'
      Literal UInt64_0
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.query_log
   Function and (children 1)
    ExpressionList (children 3)
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier type
       Literal \'QueryFinish\'
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier current_database
       Function currentDatabase (children 1)
        ExpressionList
     Function like (children 1)
      ExpressionList (children 2)
       Identifier query
       Literal \'%SELECT%FROM%t_nullable_keys_%\'
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier table
