SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 2)
    Literal \'FETCH PARTITION uses multiple threads\'
    Function greater (children 1)
     ExpressionList (children 2)
      Identifier peak_threads_usage
      Literal UInt64_10
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.query_log
   Function and (children 1)
    ExpressionList (children 4)
     Function greaterOrEquals (children 1)
      ExpressionList (children 2)
       Identifier event_date
       Function yesterday (children 1)
        ExpressionList
     Function notEquals (children 1)
      ExpressionList (children 2)
       Identifier type
       Literal \'QueryStart\'
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier query_kind
       Literal \'Alter\'
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier current_database
       Function currentDatabase (children 1)
        ExpressionList
