CreateQuery users (children 3)
 Identifier users
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration uid (children 1)
    DataType Int16
   ColumnDeclaration name (children 1)
    DataType String
   ColumnDeclaration age (children 1)
    DataType Int16
 Storage definition (children 2)
  Function MergeTree (children 1)
   ExpressionList
  Identifier uid
