ObjectDB Database Search

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Inserted entities with strings as keys and indices needs more and more ram memory in comparing to primitive integers as keys and indices

Hello, I have a problem with inserting of many entities. We use strings as primary key and indices ... . Can you explain this and do you have an idea for the case that strings are used for keys and indices? See both examples. btc_es BTC EmbeddedSystems Correction. The case with strings as primary key

String Encoding Issue

Hi all Encounter a character encoding issue when i try to retrieve a String column containing Chinese character. Retrieve a String column on odb file.  em = emf.createEntityManager(); Query ... ();) {     System.out.println(itr.next().getName()); // name is a string column

Memory consumption of empty Strings

for an enhancement of objectdb: My program has several entities which contain many String . Often some of these String are empty (""). To avoid unnecessary memory consumption, the String within the entities are initialized like: String firstName = ""; In this case every "empty" attribute shares the same String

Possible issue with String fields

to commit transaction: String index out of range: 5 (error 613) at com.objectdb.jpa.EMImpl.commit ... .StringIndexOutOfBoundsException: String index out of range: 5 at java.lang. String .charAt( String .java:695) at com.objectdb.o.SYH ... When I comment out the fields that are strings all works out fine. I tried replacing the jdbc field

failure to enforce NOT NULL for java.lang.String

.IDENTITY) private Long id; @Unique @Persistent(nullValue=NullValue.EXCEPTION) private String username; public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getUsername() { return username; } public void setUsername( String username) { this.username = username

ORDER BY problem, when String starts with language specific character

anaq x ObjectDB uses the ordinal Java String lexicographical order, which is based on the order ... fields - name and normalizedName , and just keeping strings in name using the decomposed form ... .*; public final class T352 {     public static void main( String [] args)   

Error reading UTF string

Good day, I have many errors like this, when try to use java.util.UUID as string in querys. 16:18 ... .objectdb.o.InternalException: Error reading UTF string at org.jboss.as.ejb3.tx.CMTTxInterceptor ... reading UTF string at granat.dp.ejb.PersonBean.find(PersonBean.java:287) [DP-ejb.jar:] at sun.reflect

"Unsupported auto value type java.lang.String" when persisting new instance

. String for field hr.hzmo.network.model.Device.ID (error 323) at com.objectdb.jpa.EMImpl.persist ... .java:71) Caused by: com.objectdb.o.UserException: Unsupported auto value type java.lang. String ... for primary key: @Id @GeneratedValue(strategy=GenerationType.IDENTITY) private String ID; kiki

String Contains Query Result - Possible?

Hi, I have a managed database for an Entity, "Program", containing a String field, "description", that is effectively a unique sub- string of a system generated description. Example ... even when using wildcards as the input string will be larger than the string being searched for. Presently

substring works with string but not with char

with a string parameter select f from Foo f where substring(f.name, 1, 1) = ?1 but when i use a char ... of the left side expression is String and the type on the right side expression (the parameter) is Character . In ObjectDB as in Java char is comparable to int but not to String . Maybe an exception

String representation of a query

Hi, Is it possible to get a JPQL string having a Query object instance? JpaQuery class doesn't ... with JPQL string and parameters map to find and optimize the most ineffective cases. kborkowski Karol Borkowski Following your request a toString implementation that returns the query string

Schema migration - long to String

Hi, I need to change field type in our model from long to String . After changing filed type in our model and repairing database with doctor, most of our entities is gone. Doctor puts some errors ... documentation? lwalkowski Lukasz Walkowski Changing a field from long to String should not require any

order by string with numbers

Hi Anyone could help me I need to order a string  for example user1, user2, ..., user1000 I found sql solution but I would like to use criteria builder and I don´t if exist CAST and AS UNSIGNED ... .parseInt is supported by ObjectDB in JPQL string queries. You may try using Integer.parseInt as a JPA criteria query function . support Support

Error reading UTF string

reading UTF string com.objectdb.o.InternalException: Error reading UTF string at com.objectdb.o.BYR

like operator (String)

; objectdb-2.4.7_07, alsothere exists an @Index for String email        

String comparison in query where clause

I am having trouble getting a simple string comparison to work in an SQL "where" clause.  It is my understanding that queries are case sensitive by default and I do not want that, so I am constructing the query as follows... SELECT e FROM Exercise AS e WHERE UPPER(e.name) = ?0 and then I

General Performance Issues Illustrated with a Specific Method

listPatientsByIDsWithBasicData( String ids) { Long st = new Date().getTime(); System.out.println ... ().equals("")) { return cs; } String jpql; Map m; m = new HashMap(); jpql = "select new lk.gov ... (cascade = CascadeType.ALL,fetch = FetchType.EAGER) private Person person; @Index private String phn

Criteria Query Selection and Results

.persistence.criteria package, since they might be useful also in string based JPQL queries. Using tuples

JPA Persistence Unit

should be used. ObjectDB is represented by the com.objectdb.jpa.Provider string . If not specified, the first JPA

Server User List

permissions are granted. The comma separated string value may contain the following permissions

ORDER BY clause (JPQL / Criteria API)

whose type is comparable (i.e. numbers, strings and date values) and is derived from the SELECT

JPA Primary Key

.lang. String . java.util.Date , java.sql.Date , java.sql.Time , java.sql.Timestamp. Any enum type

Enable intern() for Retrieved Strings

Implement a setting, where the developer can specify which Strings should be loaded via the String ... of instantiating every first name with a new String , the user should be able to specify that this field should be loaded via String . intern() (with all its advantages and disadvantages). mlaggner Manuel Laggner

Collation and String Order

ObjectDB should support selecting collation when a new database is created. The collation will affect the way strings are sorted in queries (with ORDER BY). Currently strings are always ordered by Unicode order, and a workaround that enables controlling the order is to use normalizing, as

@Enumerated(EnumType.STRING) annotation inhibits proper execution of IN expressions.

When the following annotation is present on an enum type entity field: @Enumerated(EnumType. STRING ) Queries using JPQL IN expressions on this field won't work correctly anymore. This issue ... ;to @Enumerated(EnumType. STRING ) , as your suggestion. It happened because ObjectDB considered

Error reading UTF string (Serialized Objects in Explorer)

Error reading UTF string (Serialized Objects in Explorer)

InterfaceRef jakarta.persistence.EntityManager

- class of entity graph Return: entity graph Since: JPA 2.1 EntityGraph createEntityGraph ( String ... Since: JPA 2.1 Query createNamedQuery ( String  name) Create an instance of Query for executing ... - if a query has not been defined with the given name or if the query string is found to be invalid

InterfaceRef jakarta.persistence.metamodel.EmbeddableType

Methods Attribute getAttribute ( String  name) Return the attribute of the managed type ... Since: JPA 2.0 CollectionAttribute getCollection ( String  name) Return the Collection-valued ... Since: JPA 2.0 CollectionAttribute getCollection ( String  name, Class  elementType) Return

InterfaceRef jakarta.persistence.metamodel.ManagedType

Public Methods Attribute getAttribute ( String  name) Return the attribute of the managed type ... ( String  name) Return the Collection-valued attribute of the managed type that corresponds ... in the managed type Since: JPA 2.0 CollectionAttribute getCollection ( String  name, Class

InterfaceRef jakarta.persistence.metamodel.IdentifiableType

or mapped superclass type. Since: JPA 2.0 Public Methods Attribute getAttribute ( String  name ... ( String  name) Return the Collection-valued attribute of the managed type that corresponds ... ( String  name, Class  elementType) Return the Collection-valued attribute of the managed

InterfaceRef jakarta.persistence.criteria.From

Inherited from: FetchParent Since: JPA 2.0 Fetch fetch ( String  attributeName) Create a fetch join ... - if attribute of the given name does not exist Inherited from: FetchParent Since: JPA 2.0 Fetch fetch ( String ... attribute Inherited from: Path Since: JPA 2.0 Path get ( String  attributeName) Create a path

ClassRef jakarta.persistence.PersistenceConfiguration

Constructors PersistenceConfiguration ( String  name) Create a new empty configuration. An empty ... configuration is missing or if the factory could not be created Since: JPA 3.2 String jtaDataSource ... null Since: JPA 3.2 PersistenceConfiguration jtaDataSource ( String  dataSourceJndiName) Specify

InterfaceRef jakarta.persistence.EntityGraph

defined Inherited from: Graph Since: JPA 3.2 AttributeNode addAttributeNode ( String  attributeName ... addAttributeNodes ( String ... attributeName) Add one or more attribute nodes to the entity graph ... addElementSubgraph ( String  attributeName) Add a node to the graph that corresponds to a collection

InterfaceRef jakarta.persistence.Subgraph

AttributeNode addAttributeNode ( String  attributeName) Get an existing attribute node for the attribute ... Inherited from: Graph Since: JPA 3.2 void addAttributeNodes ( String ... attributeName) Add ... defined Inherited from: Graph Since: JPA 3.2 Subgraph addElementSubgraph ( String  attributeName) Add

InterfaceRef jakarta.persistence.Graph

( String  attributeName) Get an existing attribute node for the attribute with the given name, or ... : IllegalStateException - if this EntityGraph has been statically defined Since: JPA 3.2 void addAttributeNodes ( String ... has been statically defined Since: JPA 3.2 Subgraph addElementSubgraph ( String  attributeName) Add a node

InterfaceRef jakarta.persistence.criteria.Join

Return: the resulting join Inherited from: From Since: JPA 2.0 Join join ( String  attributeName ... of the given name does not exist Inherited from: From Since: JPA 2.0 Join join ( String   ... Inherited from: From Since: JPA 2.0 CollectionJoin joinCollection ( String  attributeName

AnnotationRef jakarta.persistence.TableGenerator

id numbers from the generator. Since: JPA 1.0 String catalog default "" (Optional) The catalog ... that stores the last value generated. Since: JPA 1.0 String name default "" (optional) A unique ... . Since: JPA 1.0 String options default "" (Optional) A SQL fragment appended to the generated DDL

InterfaceRef jakarta.persistence.StoredProcedureQuery

Object getOutputParameterValue ( String  parameterName) Retrieve a value passed back from ... .1 Parameter getParameter ( String  name) Get the parameter object corresponding to the declared ... getParameter ( String  name, Class  type) Get the parameter object corresponding to the declared

AnnotationRef jakarta.persistence.DiscriminatorColumn

; and the discriminator type to DiscriminatorType. STRING . Example: {@snippet : See Also: DiscriminatorValue DiscriminatorType Since: JPA 1.0 Public Annotation Attributes String columnDefinition default ... .0 DiscriminatorType discriminatorType default STRING (Optional) The type of object/column to use as

AnnotationRef jakarta.persistence.NamedNativeQuery

are scoped to the persistence unit. A named query may be executed by calling ( String , Class) . In simple ... String name default null The name used to identify the query in calls to EntityManager.createNamedQuery . Since: JPA 1.0 String query default null The native SQL query string . Since: JPA 1.0 Class

CriteriaBuilder.replace(x,substring,replacement) - JPA Method

; Expression  x,     String  substring,     String  replacement ) Create an expression replacing every occurrence of a substring within a string . Parameters: x - string expression substring - the literal substring to replace replacement - the replacement string

CriteriaBuilder.locate(x,pattern,from) - JPA Method

; Expression  x,     String  pattern,    int from ) Create expression to locate the position of one string within another, returning position of first character if found. The first position in a string is denoted by 1. If the string to be located is not found, 0

CriteriaBuilder.locate(x,pattern) - JPA Method

; Expression  x,     String  pattern ) Create expression to locate the position of one string within another, returning position of first character if found. The first position in a string is denoted by 1. If the string to be located is not found, 0 is returned. Warning: the order

AnnotationRef jakarta.persistence.JoinColumn

to the column. These are only used if table generation is in effect. Since: JPA 3.2 String columnDefinition ... . Defaults to the generated SQL for the column. Since: JPA 1.0 String comment default "" (Optional) A comment ... generated by the persistence provider. Since: JPA 1.0 String name default "" (Optional) The name

AnnotationRef jakarta.persistence.NamedQuery

. A named query may be executed by calling ( String , Class) . The following is an example ... and the persistence context joined to the transaction. Since: JPA 2.0 String name default null (Required ... String query default null (Required) The query string in the Jakarta Persistence query language

AnnotationRef jakarta.persistence.JoinTable

Public Annotation Attributes String catalog default "" (Optional) The catalog of the table. Defaults ... .2 String comment default "" (Optional) A comment to be applied to the table. This is only used ... .0 String name default "" (Optional) The name of the join table. Defaults to the concatenated names

AnnotationRef jakarta.persistence.MapKeyJoinColumn

: {@snippet : See Also: ForeignKey Since: JPA 2.0 Public Annotation Attributes String columnDefinition ... provider. Since: JPA 2.0 String name default "" (Optional) The name of the foreign key column ... default false (Optional) Whether the foreign key column is nullable. Since: JPA 2.0 String options

AnnotationRef jakarta.persistence.Table

apply. Example: {@snippet : Since: JPA 1.0 Public Annotation Attributes String catalog default ... if table generation is in effect. Since: JPA 3.2 String comment default "" (Optional) A comment ... is created automatically. Since: JPA 2.1 String name default "" (Optional) The name of the table

Step 4: Add a Servlet Class

a new guest: String name = request.getParameter("name"); if (name != null) guestDao.persist(new

Step 4: Add a Servlet Class

= emf.createEntityManager(); try { // Handle a new guest (if any): String name = request