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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™.
Environment variablesVarious environment variables affect the functionality of your HCL OneDB™ products. You can set environment variables that identify your terminal, specify the location of your software and define other parameters.
Environment variables in HCL OneDB™ productsThe topics that follow discuss (in alphabetic order) environment variables that HCL OneDB™ database server products and their utilities use.
INFORMIXOPCACHE environment variable

INFORMIXOPCACHE environment variable

The INFORMIXOPCACHE environment variable can specify the size of the memory cache for the staging-area blobspace of the client application.

kilobytes: Specifies the value you set for the optical memory cache.

Set the INFORMIXOPCACHE environment variable by specifying the size of the memory cache in KB. The specified size must be equal to or smaller than the size of the system-wide configuration parameter, OPCACHEMAX.

If you do not set INFORMIXOPCACHE, the default cache size is 128 kilobytes or the size specified in the configuration parameter OPCACHEMAX. The default for OPCACHEMAX is 0. If you set INFORMIXOPCACHE to a value of 0, Optical Subsystem does not use the cache.