ObjectDB ObjectDB

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21

General Settings and Logging

" />   <url-history size="50" user="true" password="true" /> <log path="$objectdb/log/" max="8mb ... recently used databases in the Explorer easier. The <log> element <log path="$objectdb/log/" max ... file exceeds the maximum size, which is specified by the max attribute. The stdout and stderr
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ObjectDB Object Database Features

executions. Result range settings (first, max) - for paging. Query Structure SELECT (including NEW ... (COUNT, SUM, AVG, MAX, MIN). Query Expressions Path navigation expressions using the dot (.) operator
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Index Definition

and MAX queries: SELECT MIN(p.x), MAX(p.x) FROM Point p Given an index on field x ObjectDB
12

FROM clause (JPQL / Criteria API)

, INDEX, INNER, IS, JOIN, KEY, LEADING, LEFT, LENGTH, LIKE,LOCATE, LOWER, MAX, MEMBER, MIN, MOD, NEW
12

Database Explorer

of elements. Use the [First] and [Max] fields to set the result range. Check [Disable Cache] to bypass
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Is ObjectDB better than competing object databases?

queries (max, min, count, sum and avg). ObjectDB supports rich queries, including aggregate queries
12

JPA Criteria API Queries

, count, sum, avg, min, max, ...). ORDER BY clause (orderBy, Order, asc, desc). The links
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Database Replication and Clustering

the configuration: <server>     <connection port="6001" max="100" />     <data path="$objectdb/db
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JPA Query Structure (JPQL / Criteria)

GROUP BY / HAVING (groupBy, having, count, sum, avg, min, max, ...). Criteria ORDER BY (orderBy, Order, asc, desc).
1

[ODB1] Chapter 5 - JDO Connections

before throwing an exception: System.setProperty("com.objectdb.lock.retry.max", "10"); // Wait

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.

Need Help?

  1. Search ObjectDB website
  2. Read the FAQ
  3. Follow the Tutorials
  4. View or post in the forum
  5. Search or file an issue
  6. Contact support