CreateQuery db_hang test_mv (children 5)
 Identifier db_hang
 Identifier test_mv
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration A (children 1)
    DataType Int64
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 2)
    ExpressionList (children 1)
     Asterisk
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       TableIdentifier db_hang.test
 ViewTargets (children 1)
  Storage definition (children 2)
   Function MergeTree
   Identifier A