使用下面的腳本查看表上索引相關信息：

select

ind.uniqueness uniq,

ind.owner||'.'||col.index_name indname,

col.column_name colname

from

dba_ind_columns col,

dba_indexes ind

where

ind.owner = upper('&ixowner')

and

ind.table_name = upper('&tabname')

and

col.index_owner = ind.owner

and

col.index_name = ind.index_name

order by

col.index_name,

col.column_position

/

Uniqueness Index Name Column Name

---------- ---------------------------------------- -------------------------

NONUNIQUE WMS.IDX2_FK2_D_4880 MODE_ID

NONUNIQUE WMS.IDX2_FK2_ORDERTYPE_ID_609 ORDERTYPE_ID

NONUNIQUE WMS.IDX2_GSOH_LASTSHIPMENTTIME LASTSHIPMENTTIME

NONUNIQUE WMS.IDX2_GSOH_UDF2 UDF2

NONUNIQUE WMS.IDX2_SOH_CHECKTRACKNO SYS_NC00133$

NONUNIQUE WMS.IDX2_SOH_CREATEDTIME CREATEDTIME

NONUNIQUE WMS.IDX2_SOH_CUSTOMER_ID CUSTOMER_ID

NONUNIQUE WMS.IDX2_SOH_NO SYS_NC00134$

NONUNIQUE WMS.IDX2_SOH_REF2 SYS_NC00132$

看到的列 (SYS_NC00134$) ，感覺怪怪的，網上說是可能是對列的表達式加的索引，使用下面的語句進行查詢，果真如此

11:11:01 sys@wms>select column_expression from dba_ind_expressions where index_name ='IDX2_SOH_NO';

COLUMN_EXPRESSION

---------------------------------------------------------------------------------------------------------------------------------------

UPPER("SALESORDERNO")