CreateQuery mv1 (children 4)
 Identifier mv1
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration s (children 1)
    DataType String
   ColumnDeclaration x (children 2)
    DataType String
    Literal \'b\'
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 2)
    ExpressionList (children 1)
     Function concat (alias s) (children 1)
      ExpressionList (children 2)
       Function tupleElement (children 1)
        ExpressionList (children 2)
         Function tuple (children 1)
          ExpressionList (children 1)
           Asterisk
         Literal UInt64_1
       Literal \'mv1\'
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       TableIdentifier src
 ViewTargets (children 1)
  Storage definition (children 3)
   Function MergeTree (children 1)
    ExpressionList
   Function tuple (children 1)
    ExpressionList
   Identifier s
