About length

manual

Strings in JPQL and Criteria Queries

Explains string expressions in JPQL queries, including LIKE, LOCATE, LOWER, UPPER, TRIM, CONCAT and SUBSTRING.... - String Pattern Matching with Wildcards LENGTH - Counting Characters in a String LOCATE - Locating ... character) represents a real % character. LENGTH - Counting Characters in a String The LENGTH (str) function ...

 
api-jpa

length(x)

Create expression to return length of a string.(Method of javax.persistence.criteria.CriteriaBuilder)

 
forum_thread

Multi part paths in a composite index must have the same length

Hi, I am trying to create some index in a DB - but I get an exception when i try to commit. Exception in thread "main" [ObjectDB 2.6.0_01] javax.persistence.PersistenceException Invalid index path 'tStamp.value / instrumentId' in type Entities.OrderBookNew (error 328) at com.objectdb.jpa.EMImpl.createQuery(EMImpl.java:958)   Here is how the class of the persisted object looks like ... part paths in a composite index must have the same length . Therefore , the following index definition is invalid : ...

 
api-jpa

Column.length

(Optional) The column length.(Annotation Element of javax.persistence.Column)

 
api-jpa

MapKeyColumn.length

(Optional) The column length.(Annotation Element of javax.persistence.MapKeyColumn)

 
api-jpa

DiscriminatorColumn.length

(Optional) The column length for String-based discriminator types.(Annotation Element of javax.persistence.DiscriminatorColumn)

 
api-jdo

Column.length

Maximum length of data stored in this column.(Annotation Element of javax.jdo.annotations.Column)

 
manual

JPA Query Expressions (JPQL / Criteria)

Describes JPA query (JPQL / Criteria API) expressions (literals, operators and functions).... pattern. See JavaDoc Reference Page... , length length(x) CriteriaBuilder's method Create expression to return ...

 
api-jpa

javax.persistence.criteria.CriteriaBuilder

Used to construct criteria queries, compound selections, expressions, predicates, orderings.(Interface of JPA)

 
api-jpa

javax.persistence.Column

Is used to specify the mapped column for a persistent property or field.(Annotation of JPA)