ALTER INDEXTYPE

Purpose

Use the ALTER INDEXTYPE statement to add or drop an operator of the indextype or to modify the implementation type or change the properties of the indextype.

Prerequisites

To alter an indextype in your own or another schema, you must have the ALTER ANY INDEXTYPE system privilege.

To add a new operator, you must have the EXECUTE object privilege on the operator.

To change the implementation type, you must have the EXECUTE object privilege on the new implementation type.

Syntax

alter_indextype::=

Text description of alter_indextype

using_type_clause::=

Text description of using_type_clause

Semantics

schema

Specify the name of the schema in which the indextype resides. If you omit schema, Oracle assumes the indextype is in your own schema.

indextype

Specify the name of the indextype to be modified.

ADD | DROP

Use the ADD or DROP clause to add or drop an operator.

• For schema, specify the schema containing the operator. If you omit schema, Oracle assumes the operator is in your own schema.
• For operator, specify the name of the operator supported by the indextype.

  All the operators listed in this clause should be valid operators.

• For parameter_type, list the types of parameters to the operator.

USING Clause

The USING clause lets you specify a new type to provide the implementation for the indextype.

COMPILE

Use this clause to recompile the indextype explicitly. This clause is required only after some upgrade operations, because Oracle normally recompiles the indextype automatically.

Examples

Altering an Indextype: Example

The following example adds another operator binding to the TextIndexType indextype created in the CREATE INDEXTYPE statement. TextIndexType can now support a new operator lob_contains with the bindings(CLOB, CLOB):

ALTER INDEXTYPE TextIndexType ADD lob_contains(CLOB, CLOB);