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SQL programmingYou can use the HCL OneDB™ implementation of the SQL language to develop applications for HCL OneDB™ database servers.
Guide to SQL: ReferenceThe HCL OneDB™ Guide to SQL: Reference contains the reference information for the system catalog tables, data types, and environment variables of the HCL OneDB™ dialect of the SQL language, as implemented in HCL OneDB™. These topics also include information about the stores_demo, sales_demo, and superstore_demo databases that are included with HCL OneDB™.
System catalog tablesThe system catalog consists of tables and views that describe the structure of the database. Sometimes called the data dictionary, these table objects contain everything that the database knows about itself. Each system catalog table contains information about specific elements in the database. Each database has its own system catalog.
Information Schema
Generating the Information Schema Views

Generating the Information Schema Views

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The Information Schema views are generated automatically when you, as DBA, run the following DB-Access command:

dbaccess database-name $ONEDB_HOME/etc/xpg4_is.sql

The views display data from the system catalog tables. If tables, views, or routines exist with any of the same names as the Information Schema views, you must either rename those database objects or rename the views in the script before you can install the views. You can drop the views with the DROP VIEW statement on each view. To re-create the views, rerun the script.

Important: In addition to the columns specified for each Information Schema view, individual vendors might include additional columns or change the order of the columns. It is recommended that applications not use the forms SELECT * or SELECT table-name* to access an Information Schema view.

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