CreateQuery mv_group (children 4)
 Identifier mv_group
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration x (children 1)
    DataType String
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 3)
    ExpressionList (children 1)
     Identifier x
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       TableIdentifier test_00687
    ExpressionList (children 1)
     Identifier x
 ViewTargets (children 1)
  Storage definition (children 3)
   Function MergeTree
   Function tuple (children 1)
    ExpressionList
   Function tuple (children 1)
    ExpressionList