Fast Object Database for Java - with JPA/JDO support

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99

max(x)

Method javax.persistence.criteria.CriteriaBuilder Expression max( Expression x ) Create an aggregate expression applying the numerical max operation. Parameters: x - expression representing input value to max operation Returns: max expression Since: JPA 2.0
51

GROUP BY and HAVING clauses

(count, sum, avg, max, min) that are carried out on all the objects (or the object tuples) in ... the minimum of comparable values (numeric, strings, dates). MAX - returns the maximum of comparable values ... of numeric values. min, least - return an expression representing the minimum of comparable values. max
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Server Configuration

: max="0" /> max="0" /> The element specifies ... to the database (as explained in the JPA Overview section in chapter 3). The max attribute specifies the maximum
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[ODB1] Chapter 8 - ObjectDB Server

path="$objectdb/server/data" /> max="10" user-max="10" timeout="300" /> max="10" timeout="300" /> All attributes and sub elements shown in
34

Error using query with MAX() function

"); Expression me = cb.max(c); CriteriaQuery s = q.select(me); Predicate predicate = cb ... set to debug. [2011-05-02 21:10:36 #150 query.manager]
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Understanding Database max-threads objectdb.conf Settings Option

These are questions asked in the context of the proposed architecture described in the forum thread titled, "Sample JDO Architecture for Follow Up Questions". In the objectdb.conf file (attached to forum thread mentioned above), I set Database max-threads. In the documentation, it was not
32

Max transaction size

What’s the max transaction size, or how is it determined? Trianglehead Json Error The main limit is the available memory in the JVM. There is no hard limit. support Support
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Exceeding max connections and crashing

Exceeding max connections and crashing
29

Database Management Settings

enabled="true" sync="false" path="." max="128mb" /> max-threads="10 ... for most applications. The element max
26

Comparison in JPQL and Criteria API

two simple comparisons. The two following expressions are equivalent (:min and :max are query parameters): x BETWEEN :min AND :max x >= :min AND x <= :max Similarly, NOT BETWEEN is also a shortcut and the following expressions are equivalent: x NOT BETWEEN :min AND :max x < :min OR x

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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