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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.
PDQPRIORITY environment variableThe PDQPRIORITY environment variable determines the degree of parallelism that the database server uses and affects how the database server allocates resources, including memory, processors, and disk reads.
Using PDQPRIORITY with HCL OneDB™

Using PDQPRIORITY with HCL OneDB

The resources value specifies the query priority level and the amount of resources that the database server uses to process the query.

When PDQPRIORITY is not set, the default value is OFF.

When PDQPRIORITY is set to HIGH, HCL OneDB™ determines an appropriate value to use for PDQPRIORITY based on several criteria. These include the number of available processors, the fragmentation of tables queried, the complexity of the query, and additional factors.

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