CreateQuery mv (children 4)
 Identifier mv
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration s (children 1)
    DataType String
   ColumnDeclaration lc (children 1)
    DataType String
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 2)
    ExpressionList (children 2)
     Literal \'a\' (alias s)
     Function toLowCardinality (alias lc) (children 1)
      ExpressionList (children 1)
       Literal \'b\'
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       TableIdentifier src
 ViewTargets
