indextype is ctxsys.context : Create Index « Index « Oracle PL / SQL






  1. Oracle PL / SQL
  2. Index
  3. Create Index

indextype is ctxsys.context

    
SQL>
SQL>
SQL> create table t ( x clob );

Table created.

SQL>
SQL> set autotrace traceonly explain
SQL> select * from t;

Execution Plan
----------------------------------------------------------
Plan hash value: 1601196873

----------------------------------
| Id  | Operation         | Name |
----------------------------------
|   0 | SELECT STATEMENT  |      |
|   1 |  TABLE ACCESS FULL| T    |
----------------------------------

Note
-----
   - rule based optimizer used (consider using cbo)

SQL>
SQL> create index t_idx on t(x) indextype is ctxsys.context;

Index created.

SQL> select * from t;

Execution Plan
----------------------------------------------------------
Plan hash value: 1601196873

----------------------------------------------------------
| Id  | Operation         | Name | Rows  | Bytes | Cost  |
----------------------------------------------------------
|   0 | SELECT STATEMENT  |      |    82 |  8200 |     1 |
|   1 |  TABLE ACCESS FULL| T    |    82 |  8200 |     1 |
----------------------------------------------------------

Note
-----
   - cpu costing is off (consider enabling it)

SQL>
SQL> set autotrace off
SQL>
SQL> drop table t;

Table dropped.








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