CreateQuery check_codec (children 3)
 Identifier check_codec
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration a (children 1)
    DataType Int
   ColumnDeclaration b (children 2)
    DataType Int
    Function CODEC (children 1)
     ExpressionList (children 2)
      Function Delta
      Function ZSTD
 Storage definition (children 3)
  Function MergeTree
  Identifier a
  Set