emcreateQuery

emcreateQuery is a term used in some Java persistence contexts to describe the operation of creating a query object from a query string within a persistence context, typically managed by an entity manager (often abbreviated em). The function yields a Query or TypedQuery object that can be executed to retrieve data from the underlying database. It is not a standard API name in major persistence specifications; the closest standard equivalent is EntityManager.createQuery in the Java Persistence API.

Usage and behavior

emcreateQuery accepts a query string written in the framework’s query language, such as JPQL or HQL, and prepares a query that can later be executed. Depending on the API, it may also support a typed form that returns a TypedQuery<T> for a specific result type. The resulting query object supports parameter binding (for example, named or positional parameters), and can be executed to obtain results via methods like getResultList or getSingleResult. The exact capabilities, including parameter binding syntax and result typing, depend on the implementation.

Typical lifecycle

In standard practice, an active persistence context is required when creating a query. After creation, developers bind parameters, configure pagination if supported, and then execute the query to obtain results. Exceptions may be thrown for invalid query strings, missing parameters, or persistence problems (for example, IllegalArgumentException or PersistenceException).

Relation to standard APIs

The most common real-world equivalent is EntityManager.createQuery. In documented libraries or tutorials, emcreateQuery may appear as shorthand or illustrative naming to emphasize the “entity manager create query” action, rather than as a distinct, universal API.

See also

EntityManager.createQuery, TypedQuery, Query, JPQL, HQL, PersistenceException.