Teradata：如何将范围分区添加到非空 table？

Question

我有这样的 table:

CREATE SET TABLE ONLINE_BANKING.TRANSACTIONS ,NO FALLBACK ,
     NO BEFORE JOURNAL,
     NO AFTER JOURNAL,
     CHECKSUM = DEFAULT,
     DEFAULT MERGEBLOCKRATIO
     (
      transaction_id INTEGER NOT NULL,
      date_of_transaction DATE FORMAT 'YYYYMMDD' NOT NULL,
      amount_of_transaction DECIMAL(38,2) NOT NULL,
      transaction_type_code BYTEINT NOT NULL DEFAULT 25 , 
UNIQUE PRIMARY INDEX ( transaction_id );

我想将分区添加到我的填充数据 table 到 date_of_transaction 列。

我这样试过：

ALTER TABLE TRANSACTIONS
MODIFY PRIMARY INDEX (date_of_transaction) -- tried to write different columns, but failed
ADD RANGE BETWEEN DATE '1998-01-01' AND DATE '2015-12-31' EACH INTERVAL '1' MONTH;

但是 Teradata 返回错误：

DROP RANGE/ADD RANGE clause no corresponding level that is a RANGE_N function

这是什么意思，我怎样才能达到目标？

Answer 1

您不能向未分区的现有 table 添加分区，但是，您只能从已分区的 table 添加或删除范围。

唯一的方法是像这样创建一个新的 table 和 INSERT/SELECT：

CREATE SET TABLE ONLINE_BANKING.TRANSACTIONS_PPI ,NO FALLBACK ,
     NO BEFORE JOURNAL,
     NO AFTER JOURNAL,
     CHECKSUM = DEFAULT,
     DEFAULT MERGEBLOCKRATIO
     (
      transaction_id INTEGER NOT NULL,
      date_of_transaction DATE FORMAT 'YYYYMMDD' NOT NULL,
      amount_of_transaction DECIMAL(38,2) NOT NULL,
      transaction_type_code BYTEINT NOT NULL DEFAULT 25 , 
      ...)
PRIMARY INDEX ( transaction_id )
PARTITION BY
   RANGE_N (date_of_transaction BETWEEN DATE '1998-01-01' AND DATE '2015-12-31' 
   EACH INTERVAL '1' MONTH);

INSERT INTO ONLINE_BANKING.TRANSACTIONS_PPI
SELECT * FROM ONLINE_BANKING.TRANSACTIONS;

-- when everything is ok
DROP TABLE ONLINE_BANKING.TRANSACTIONS;
RENAME TABLE ONLINE_BANKING.TRANSACTIONS_PPI AS ONLINE_BANKING.TRANSACTIONS;

Teradata：如何将范围分区添加到非空 table？

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