#Universal database meaning software
#Universal database meaning code

The checksum is typically sent at the end of the packet and used at the receiving end to confirm the integrity of the preceding data.Ĭlient – A client-side process, containing proxy functions, connecting to a server process that contains the actual database functions.Ĭlient/Server – A server is a program that runs on a computer that directly manages the database.

One checksum formula is a simple addition, with overflow ignored, wherein the bytes of the packet are added together into a variable of a fixed size/width (say, 16 bits) as they are sent.

A checksum is most often used when sending a packet of data over a network or other communications channel. Sometimes called the system catalog or just syscat.Ĭhecksum – A numerical check value calculated from a larger set of data. A cache is used to minimize the amount of physical disk I/O performed by the DBMS.Ĭascade – A foreign key attribute that automatically migrates the changes made to a referenced (i.e., primary key) table to all of the referencing ( foreign key) table rows.Ĭatalog – A repository for the computer-readable form of a database’s data definition meta-data. See WikipediaĬache – The computer memory that is set aside to contain a portion of the database data that has most recently been accessed by the database application program. Mechanisms for creating and removing breakpoints are provided by most debugging tools.ī-tree – An indexing method in which the values of the columns used in the index are efficiently maintained in sorted order that also provides fast access (three or four additional disk accesses) to an individual index entry. It is also a specific term (and synonym) for data of type long varbinary.īreakpoint – A location in a program at which execution is to be stopped and control of the processor switched to the debugger. In SQL, BLOB can be a general term for any data of type long varbinary, long varchar, or long wvarchar. TCP/IP uses big-endian representation.īLOB – An abbreviation for Binary Large OBject. Similarly, every communications protocol must define the byte order of its multibyte values. The Java virtual machine is big-endian as well. Sun’s SPARC, Motorola’s 68k, and the PowerPC families are all big-endian.

Every processor stores its data in either big-endian or little-endian format. Note that only the bytes are reordered, never the nibbles or bits that comprise them.

#Universal database meaning software

The application software is unlikely to be reusable across embedded platforms, simply because each embedded system has a different application.Ītomicity – The property of a transaction that guarantees that either all or none of the changes made by the transaction are written to the database.ĪVL-Tree – An AVL tree is a self balancing binary search tree.īig-Endian – A data representation for a multibyte value that has the most significant byte stored at the lowest memory address. If there is no such architecture, then this term may not be used.

#Universal database meaning code

Such application-specific code is generally built on a layered architecture of reusable components, such as a real-time operating system and network protocol stack or other middleware. The DBMS is in-process with the application code for very fast internal access.Īperiodic Server – Software that is specific to a particular embedded system. ACID – The acronym standing for the properties maintained by standard database management systems, standing for Atomicity, Consistency, Isolation, and Durability.Īpplication Server – A server that processes application-specific database operations made from application client programs.