Alters an existing index on a given table.

Syntax

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ALTER INDEX <Name> ON <TableName>|<ViewName>
(<ColumnName> [COLLATE <CollationName>]
   [[ASC|ASCENDING]|[DESC|DESCENDING]] [,<ColumnName>])
[DESCRIPTION <Description>]
[NO BACKUP FILES]

Usage

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Use this statement to alter an existing index in a table or non-updateable view.


The NO BACKUP FILES clause is optional. Unless this clause is specified, ElevateDB will create backup files (*.old) of any physical table files that were altered during the execution of the statement. Also, this clause does not apply to physical backup files created for the database catalog, which are always created and retained.

As of ElevateDB 2.21, you can now index non-updateable views. Non-updateable views are views that generate a static, insensitive result set.

Examples

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-- The following statement changes the Name index on the
-- Customer table so that the Name column is sorted case-insensitive

ALTER INDEX "Name" ON "Customer" (Name COLLATE "ANSI_CI" ASC)

Required Privileges

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The current user must be granted the ALTER privilege on the specified table in order to execute this statement. Please see the User Security topic for more information.

SQL 2003 Standard Deviations

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This statement deviates from the SQL 2003 standard in the following ways: