SQL/MX Glossary

Glossary
HP NonStop SQL/MX Glossary—523732-002
Glossary-20
Microsoft ODBC driver manager
Microsoft ODBC driver manager. An ODBC component that manages access to ODBC
drivers for ODBC applications. The driver manager loads and unloads ODBC drivers
and passes calls for ODBC functions to the correct driver. ODBC/MX uses the
Microsoft 3.0 (or later) Driver Manager.
Microsoft ODBC server. An ODBC component in the client/server architecture that stores,
retrieves, and protects data in the database. An ODBC/MX server implements core
ODBC function calls by using the SQL/MX call level interface (CLI) to access an
SQL/MP database.
mixed-workload environment. A computing environment characterized by sometimes
conflicting demands for I/O and processor resources. NonStop SQL/MX is designed to
overcome issues associated with mixed workloads executing concurrently on the same
server. Priorities can be assigned to individual workloads (queries, transactions, and
management commands) based on the urgency of the information or the expected
execution cost in terms of I/O and processor cycles. The priority of an individual
workload dictates the processor cycles and I/O allocated to it relative to other
workloads executing at the same time on the same server. This priority is carried with
each resource request made on behalf of the query or application, even when requests
are passed to other processors.
module. Contains the compiled and optimized execution plans of SQL statements from an
embedded SQL program. The module is necessary for the execution of statically
compiled programs.
module compiler. A utility that takes a self-contained (or partly self-contained) application
executable and SQL/MX compiles its embedded module definition.
module definition file (MDF). Contains SQL/MX-specific information for each embedded
SQL statement of a program. For embedded SQL in C or COBOL, the MDF is the
output of the SQL preprocessor when you specify certain options on the command line.
For embedded SQL in Java (SQLJ), the MDF is the output of the SQLJ customizer
when you specify a certain option on the command line. The MDF is the input file for
the SQL/MX compiler. For details, see the SQL/MX Programming Manual for C and
COBOL or the SQL/MX Programming Manual for Java. Contrast with embedded
module definition.
module definition source. The module definitions emitted by the preprocessor as extra
source code in the annotated output source file.
MODULE directive. An embedded SQL statement that specifies the name of a module.
module file. The file in which a module's compiled SQL plans are stored.
Module Group Specification String (MGSS). A regular identifier used by the Module
Management subsystem to represent a group. The C/C++, and COBOL preprocessors
and SQLJ Customizer append a leading circumflex (^) character and the MGSS to a
processed module name. See also processed module name.