CreateQuery mv (children 4)
 Identifier mv
 Columns definition (children 1)
  ExpressionList (children 4)
   ColumnDeclaration event_time (children 1)
    DataType DateTime
   ColumnDeclaration event_name (children 1)
    DataType String
   ColumnDeclaration user_id (children 1)
    DataType String
   ColumnDeclaration user_type (children 1)
    DataType String
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 2)
    ExpressionList (children 4)
     Identifier e.event_time
     Identifier e.event_name
     Identifier e.user_id
     Identifier u.user_type
    TablesInSelectQuery (children 2)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       TableIdentifier event (alias e)
     TablesInSelectQueryElement (children 2)
      TableExpression (children 1)
       TableIdentifier user (alias u)
      TableJoin (children 1)
       Function equals (children 1)
        ExpressionList (children 2)
         Identifier u.user_id
         Identifier e.user_id
 ViewTargets (children 1)
  Storage definition (children 2)
   Function MergeTree (children 1)
    ExpressionList
   Function tuple (children 1)
    ExpressionList (children 2)
     Identifier event_time
     Identifier event_name
