在Global临时表上创建索引

Question

是否可以在Global临时表上创建索引？如果是,我们是否需要在单个会话中创建.

我尝试了以下方式,最后得到了以下问题.

第一节:

CREATE GLOBAL TEMPORARY TABLE "SFE_ADM"."DUMMY_GLO" 
   (    "C1" VARCHAR2(6 CHAR)
   ) ON COMMIT PRESERVE ROWS ;

CREATE INDEX DUMMY_GLO_IDX ON DUMMY_GLO (C1) TABLESPACE SFE_I1;

第一节:

CREATE GLOBAL TEMPORARY TABLE "SFE_ADM"."DUMMY_GLO" 
       (    "C1" VARCHAR2(6 CHAR)
       ) ON COMMIT PRESERVE ROWS ;

第二节:

CREATE INDEX DUMMY_GLO_IDX ON DUMMY_GLO (C1) TABLESPACE SFE_I1;

第一节:

CREATE GLOBAL TEMPORARY TABLE "SFE_ADM"."DUMMY_GLO" 
       (    "C1" VARCHAR2(6 CHAR)
       ) ON COMMIT PRESERVE ROWS ;

第二节:

TRUNCATE TABLE DUMMY_GLO
CREATE INDEX DUMMY_GLO_IDX ON DUMMY_GLO (C1) TABLESPACE SFE_I1;

对于上述所有尝试,我收到一条错误消息说.

getting an error while creating index for temporary table
Error starting at line : 1 in command -
CREATE INDEX DUMMY_GLO_IND ON DUMMY_GLO (C1) TABLESPACE SFE_I1
Error at Command Line : 1 Column : 42
Error report -
SQL Error: ORA-14451: unsupported feature with temporary table
14451. 00000 -  "unsupported feature with temporary table"
*Cause:    An attempt was made to create an IOT, specify physical attributes,
           specify partition or parallel clause.
*Action:   do not do that

Answer 1

是的,您可以在临时表上创建索引,但不能为其指定表空间:

SQL> CREATE INDEX DUMMY_GLO_IDX ON DUMMY_GLO (C1);

Index created.

我不确定你为什么要尝试使用不同的会话.全局临时表及其索引只能创建一次,就像普通表一样.然后,许多会话可以立即使用该表,而无需查看彼此的数据.