CreateQuery add_materialized_column_after (children 3)
 Identifier add_materialized_column_after
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration x (children 1)
    DataType UInt32
   ColumnDeclaration z (children 1)
    DataType UInt64
 Storage definition (children 2)
  Function MergeTree
  Identifier x
