Ingres 9.2 Migration Guide - Actian

DBMS Server EnhancementsLOB LocatorsIngres supports LOB locators in compliance with the ANSI SQL 2003 Standard.LOB locators, which are passed between the client and server, are pointers tothe LOB data, which can be stored in or outside a table. They permit the clientto access LOB data outside the scope of row data retrieval, so that the clientcan control the processing and storage requirement of the LOB data.LOB locators are supported in Ingres JDBC. For more information, see theConnectivity Guide and the OpenAPI User Guide.UTF8 Character SetIngres supports the UTF8 character set, which lets you store multi-byte UTF-8encoded Unicode characters into char, varchar, and long varchar strings. TheUTF8 character set can be selected during installation.Support for the UTF8 character set provides compatibility and portability withother database architectures.Clients installed with the UTF8 character set can connect only to a DBMSServer that uses the UTF8 character set. If UTF8 is the character set for theserver, then all clients connecting to this server must also use the UTF8character set.If the server character set is UTF8, then by default any database that iscreated on the server is created Unicode-enabled with Normalization Form C(NFC) with default UNICODE collation, even if it is not explicitly defined. Thuschar, varchar, and long varchar columns (as well as nchar, nvarchar, and longnvarchar) use the UNICODE collation by default.If the database you are connecting to is Unicode-enabled, the UNICODEcollation is loaded.The collation sequence UNICODE_FRENCH is added to support French Unicodecollation.Only char, varchar, and long varchar columns support UTF-8. Ingres characterbased tools (such as the terminal monitor and ABF) show the data in UTF-8.Note: When creating a table in an installation set to the UTF8 character set,the column specification for char and varchar columns is in number of bytes(not number of characters).144 Migration Guide