CreateQuery TESTTABLE (children 3)
 Identifier TESTTABLE
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration _id (children 1)
    DataType UInt64
   ColumnDeclaration pt (children 1)
    DataType String
   ColumnDeclaration attr_list (children 1)
    DataType Array (children 1)
     ExpressionList (children 1)
      DataType String
 Storage definition (children 3)
  Function MergeTree (children 1)
   ExpressionList
  Identifier pt
  Function tuple (children 1)
   ExpressionList
