JPQL

The arguments for a query operation are the JPQL string or moniker of a predefined named query.

Neither form of compile-time safety is warranted for the parameters of a JPQL query.

JPQL is a full-featured query language with syntax similar to SQL, but it operates on entities rather than database tables.

EntityManager also acts as a factory to create executable javax. persistence. Query instances from a JPQL query string.

Querying of the supported datastores can be performed using JDOQL, JPQL or SQL (dependent on the datastore).

If this option is unchecked, the JPQL query statements will be used directly inside of the JPA Manager Bean code.

Tip: Clicking each Query Method will display the JPQL query that will be run when you run that method. (Figure 13).

The input arguments are query, which is the JPQL string; and params, which is the bound parameter values to the query, each indexed by key.

EntityManager is the factory that constructs an executable query instance given a JPQL string (line 3).

JPA 1. 0 introduced JPQL, a powerful query language that's considered a major reason for JPA's popularity.

A JPQL query is specified as a String (line 2).

This is similar to constructing an executable query given a JPQL string as input.

As mentioned earlier, some SQL might not be generated from the static generator (for example, dynamic JPQL).

For example, dynamic JPQL queries are not gathered by wsdb2gen.

Take a look back at this article's original JPQL query (the correct one)

An equivalent JPQL query would be

Querying Excel documents using JPQL

Contrast the query in Listing 7 with the equivalent (correct) JPQL

Querying XML documents using JPQL