我在版本11.2上有DBMS_DATA_MINING.CREATE_MODEL的问题.在10g上,这段代码可以正常工作,而且我十分确定在11.1它也可以工作.

CREATE OR REPLACE VIEW "SH"."ITEMS" AS SELECT PROD_ID AS item FROM SALES GROUP BY PROD_ID;

CREATE OR REPLACE VIEW "SH"."TRANSACTIONS" AS SELECT "SH"."SALES"."PROD_ID" AS item,"SH"."SALES"."CUST_ID" tid FROM "SH"."SALES" where cust_id between 100001 AND 104500 GROUP BY cust_id,prod_id;

CREATE TABLE "SH"."AR_SETTINGS" ( "SETTING_NAME" VARCHAR2(30 BYTE),"SETTING_VALUE" VARCHAR2(128 BYTE) );

INSERT INTO SH.AR_SETTINGS (SETTING_NAME,SETTING_VALUE) VALUES ('ASSO_MAX_RULE_LENGTH','6' );

INSERT INTO SH.AR_SETTINGS (SETTING_NAME,SETTING_VALUE) VALUES( 'ASSO_MIN_CONFIDENCE',TO_CHAR(0.7));

INSERT INTO SH.AR_SETTINGS (SETTING_NAME,SETTING_VALUE) VALUES( 'ASSO_MIN_SUPPORT',TO_CHAR(0.1));

BEGIN DBMS_DATA_MINING.CREATE_MODEL( model_name => 'AR_sh',mining_function => DBMS_DATA_MINING.ASSOCIATION,data_schema_name => 'sh',data_table_name => 'transactions',case_id_column_name => 'tid',settings_schema_name => 'sh',settings_table_name => 'ar_settings'); END;

原因：

ORA-40103: invalid case-id column: TID

ORA-06512: at "SYS.DBMS_DATA_MINING",line 1779

ORA-06512: at line 1

40103. 00000 - "invalid case-id column: %s"

*Cause: The column designated as case-id is not of one of CHAR,VARCHAR2,NUMBER data type. Case-id columns of type CHAR and VARCHAR2 must

be of length less than or equal to 128 bytes.

*Action: Change the schema of your input data to supply a case-id column

of appropriate data type and/or length.

为了确定：

describe "SH"."TRANSACTIONS"

Name Null Type

--

ITEM NOT NULL NUMBER

TID NOT NULL NUMBER

和

select * from v$version;

收益：

Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production

PL/sql Release 11.2.0.1.0 - Production

CORE 11.2.0.1.0 Production

TNS for 64-bit Windows: Version 11.2.0.1.0 - Production

NLSRTL Version 11.2.0.1.0 - Production

来自dmardemo.sql的The sample code导致同样的错误.

我不知道是错的.请帮忙.