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AdministeringIn addition to administering the database server, you can tune performance, replicate data, and archive data.
System administrationThese topics contain concepts, procedures, and reference information for database and database server administrators to use for managing and tuning HCL OneDB™ database servers.
Performance GuideThe HCL OneDB™ Performance Guide describes how to configure and operate your HCL OneDB™ database server to improve overall system throughput and to improve the performance of SQL queries.
Indexes and index performance considerationsHCL OneDB™ provides several types of indexes. Some performance issues are associated with indexes.
Types of indexesHCL OneDB™ uses B-tree indexes, R-tree indexes, functional indexes, and indexes that DataBlade® modules provide for user-defined data. The server also uses forest of trees (FOT) indexes, which are alternatives to B-tree indexes.
B-tree indexesHCL OneDB™ uses a B-tree index for columns that contain built-in data types (referred to as a traditional B-tree index), columns that contain one-dimensional user-defined data types (referred to as a generic B-tree index), and values that a user-defined data type returns.

B-tree indexes

HCL OneDB™ uses a B-tree index for columns that contain built-in data types (referred to as a traditional B-tree index), columns that contain one-dimensional user-defined data types (referred to as a generic B-tree index), and values that a user-defined data type returns.

Built-in data types include character, datetime, integer, float, and so forth. For more information about built-in data types, see HCL OneDB Guide to SQL: Reference.

User-defined data types include opaque and distinct data types. For more information about user-defined data types, see HCL OneDB User-Defined Routines and Data Types Developer's Guide.

The return value of a user-defined function can be a built-in or user-defined data type, but not a simple large object (TEXT or BYTE data type) or a smart large object (BLOB or CLOB data type). For more information about how to use functional indexes, see Using a functional index.

For information about how to estimate B-tree index size, see Estimating index pages.