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Oracle and IBM Db2 provide a construct explicitly named CLOB, [1] [2] and the majority of other database systems support some form of the concept, often labeled as text, memo or long character fields. CLOBs usually have very high size-limits, of the order of gigabytes. The tradeoff for the capacity is usually limited access methods.
Object Query Language (OQL) is a query language standard for object-oriented databases modeled after SQL and developed by the Object Data Management Group (ODMG). Because of its overall complexity the complete OQL standard has not yet been fully implemented in any software.
Reserved words in SQL and related products In SQL:2023 [3] In IBM Db2 13 [4] In Mimer SQL 11.0 [5] In MySQL 8.0 [6] In Oracle Database 23c [7] In PostgreSQL 16 [1] In Microsoft SQL Server 2022 [2]
Used in the declaration of a method or code block to acquire the mutex lock for an object while the current thread executes the code. [8] For static methods, the object locked is the class's Class. Guarantees that at most one thread at a time operating on the same object executes that code.
Generics are a facility of generic programming that were added to the Java programming language in 2004 within version J2SE 5.0. They were designed to extend Java's type system to allow "a type or method to operate on objects of various types while providing compile-time type safety". [1]
Function object: with a single method (in C++, the function operator, operator()) it acts much like a function; Immutable object: does not change state after creation; First-class object: can be used without restriction; Container object: contains other objects; Factory object: creates other objects
However, if there is sufficient memory or a program has a short run time, object destruction may not occur; memory simply being deallocated at process termination. In some cases, object destruction consists solely of deallocating memory, particularly with garbage-collection, or if the object is a plain old data structure. In other cases ...
Object-oriented languages represent runtime state as trees or directed graphs of objects connected by pointers or references. This does not map cleanly to a 1NF relational database, a problem sometimes called the object-relational impedance mismatch and which object relational mapper (ORM) libraries try to bridge.