SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 6)
   ExpressionList (children 4)
    Function any (alias t) (children 1)
     ExpressionList
    Function substring (alias query) (children 1)
     ExpressionList (children 3)
      Identifier query
      Literal UInt64_1
      Literal UInt64_70
    Function avg (alias usage) (children 1)
     ExpressionList (children 1)
      Identifier memory_usage
    Function count (alias count) (children 1)
     ExpressionList
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.query_log
   Function and (children 1)
    ExpressionList (children 6)
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier current_database
       Function currentDatabase (children 1)
        ExpressionList
     Function greaterOrEquals (children 1)
      ExpressionList (children 2)
       Identifier event_date
       Function toDate (children 1)
        ExpressionList (children 1)
         Literal UInt64_1604295323
     Function greaterOrEquals (children 1)
      ExpressionList (children 2)
       Identifier event_time
       Function toDateTime (children 1)
        ExpressionList (children 1)
         Literal UInt64_1604295323
     Function in (children 1)
      ExpressionList (children 2)
       Identifier type
       Literal Tuple_(UInt64_1, UInt64_2, UInt64_3, UInt64_4)
     Function in (children 1)
      ExpressionList (children 2)
       Identifier initial_user
       Literal \'\'
     Function or (children 1)
      ExpressionList (children 2)
       Function equals (children 1)
        ExpressionList (children 2)
         Literal \'all\'
         Literal \'all\'
       Function equals (children 1)
        ExpressionList (children 2)
         Function positionCaseInsensitive (children 1)
          ExpressionList (children 2)
           Identifier query
           Literal \'all\'
         Literal UInt64_1
   ExpressionList (children 1)
    Identifier query
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier usage
   Literal UInt64_5
