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14

SELECT clause (JPQL / Criteria API)

Object[] elements, one per result. The length of each result Object[] element is 2. The first array
14

JPA Query Expressions (JPQL / Criteria)

, sqrt). String expressions (like, length, locate, lower, upper, concat, substring, ...). Data
14

Numbers in JPQL and Criteria Queries

.g. LOCATE, LENGTH. as composite arithmetic expressions that use operators and functions to combine
14

JPA Criteria API Queries

, quot, mod, abs, neg, sqrt). String expressions (like, length, locate, lower, upper, concat, substring
14

GROUP BY and HAVING clauses

GROUP BY SUBSTRING(c.name, 1, 1); The query returns Object[] arrays of length 3, in which the first
12

javax.persistence.criteria.CriteriaBuilder

> length( Expression<String> x) Create expression to return length of a string. Create expression to return length of a string. Parameters: x - string expression Returns: length expression Since: JPA 2.0 ... a substring of given length starting at the specified position. First position is 1. Parameters: x
8

javax.persistence.TransactionRequiredException

the array's length is non-zero) represents the top of the stack, which is the last method invocation in ... element of the array (assuming the array's length is non-zero) represents the bottom of the stack ... that has no stack trace information concerning this throwable is permitted to return a zero-length array
1

[ODB1] Chapter 2 - A Quick Tour

// Check the arguments: 11 if (args.length != 3) 12 { 13
1

[ODB1] Chapter 9 - ObjectDB Explorer

an initial value and arrays require specifying an array length. Click the "OK" button to construct
0

javax.jdo.JDOObjectNotFoundException

element of the array (assuming the array's length is non-zero) represents the top of the stack ... was created and thrown. The last element of the array (assuming the array's length is non-zero ... is permitted to return a zero-length array from this method. Generally speaking, the array returned by

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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