Drop TEXT indexes from the database.
Dropping a TEXT index (Sybase Central)
Connect to the database as a user with DBA or RESOURCE authority.
In the left pane, select the Text Indexes folder.
In the list of Text Indexes, right-click the object to modify and select Delete.
In the confirmation dialog, click Yes.
Dropping a TEXT index (Interactive SQL)
Connect to the database as a user with DBA or RESOURCE authority.
Execute a DROP TEXT INDEX statement.
For example, to drop the MyTextIndex TEXT index, enter:
DROP TEXT INDEX MyTextIndex ON Customers;