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Issue
38

NoResultException: No matching results for a unique query

I am very often getting a "com.objectdb.o._NoResultException: No matching results for a unique query" when modifying my already persisted entities within a transaction. I cannot replicate it however because it happens infrequently. The weird thing is that the entity nevertheless gets comitted
Forum
38

Object comparation never matches

] javax.persistence.NoResultException" "No matching results for a unique query (error 782
Forum
38

Recovery file does not match db file

Just rebooted my production server, which had been running fine for months. When it came up, these errors started: ObjectDB 2.3.1_03] javax.persistence.PersistenceException Recovery file '/auctionologies/java/storage.odb$' does not match db file '/auctionologies/java/storage.odb' (error 145
Forum
36

Documentation problem - license does not match implementation

Documentation problem - license does not match implementation
Manual
32

Database Schema Evolution

the new schema for which there is a matching field in the old schema, the new field in the new entity object is initialized using the value of the matching old field in the original entity object. Fields in the new schema that do not have matching fields in the old schema are initialized
Manual
30

Strings in JPQL and Criteria Queries

Pattern Matching with Wildcards The [NOT] LIKE operator checks if a specified string matches ... characters: The percent character (%) - which matches zero or more of any character. The underscore character (_) - which matches any single character. The left operand is always the string to check
Manual
18

FROM clause (JPQL / Criteria API)

skips any outer variable value (e.g. any Country) that has no matching inner variable (e.g. a Capital ... have any matching inner value it gets at least a NULL value as a matching value in the FROM iteration
Manual
15

Schema Update

with persistable classes that have been renamed or moved in the IDE, with no matching schema configuration ... that after such changes the application is run only with the configuration that matches these changes exactly
Manual
10

Paths and Types in JPQL and Criteria API

must contain a persistent field (or property) with a matching name. The path expression
Manual
10

Index Definition

defined in the index matches the field order used in the WHERE clause of the query a more efficient range