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






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








9.1.Create Index
9.1.1.Creating an Index
9.1.2.Enforce uniqueness of values in a column using a unique index
9.1.3.Create combined-column index
9.1.4.Create a composite index on multiple columns
9.1.5.Creating a Function-Based Index
9.1.6.Create index based on cluster
9.1.7.Creates an index on the new added column
9.1.8.Create a fully indexed table named myCode
9.1.9.indextype is ctxsys.context
9.1.10.Create index for upper case last name
9.1.11.Create index along with the column definition
9.1.12.Create index for combined columns
9.1.13.Create unique index and check it in user_ind_columns and user_cons_columns
9.1.14.Demonstrate a bitmap join index.
9.1.15.create unique index with case ... when statement
9.1.16.Create Non-Unique index
9.1.17.autotrace ctxsys.context index
9.1.18.Create index with tablespace