255 | Index DefinitionQuerying without indexes requires iteration over entity objects in the database one by one. This may take a significant amount of time if many entity objects have to be examined. Using proper indexes ... . Index management introduces overhead in terms of maintenance time and storage space, so deciding |
50 | index()Method javax.persistence.criteria.ListJoin Expression<Integer> index() Create an expression that corresponds to the index of the object in the referenced association or element collection ... for which an order column has been defined. Returns: expression denoting the index Since: JPA 2.0 |
16 | JDO Annotations for Index DefinitionThe following annotations are used to define indexes on persistent fields: The Index Definition section of the ObjectDB manual explains these annotations in details. |
7 | [ODB1] Chapter 4 - JDO Metadata identity supported by ObjectDB. To enforce unique values in a field you can define a unique index as ... only in index declarations, as explained in the next section. 4.5 Index Definition Querying a large extent without indexes may take a significant amount of time because it requires iteration |
5 | javax.jdo.annotations.Indexjavax.jdo.annotations Annotation Index Target: Classes and fields (including property get methods) Annotation for a database index. Used for database schema generation to create indexes. Corresponds to the xml element "index". Since: JDO 2.1 Column[] columns Columns that compose this index. Columns |
5 | Index.tableAnnotation Element javax.jdo.annotations.Index String table Table for the index. This is needed iff annotating a type where the index is not defined on the primary table for the type. Returns: the table on which the index is defined Default value: "" Since: JDO 2.1 |
5 | Discriminator.indexedAnnotation Element javax.jdo.annotations.Discriminator String indexed Whether the discriminator is indexed. Returns: whether the discriminator is indexed Default value: "" Since: JDO 2.1 |
5 | Index.membersAnnotation Element javax.jdo.annotations.Index String[] members Member (field and property) names that compose this index. Returns: member names that compose this index Default value: {} Since: JDO 2.1 |
5 | Index.columnsAnnotation Element javax.jdo.annotations.Index Column[] columns Columns that compose this index. Returns: columns that compose this index Default value: {} Since: JDO 2.1 |
5 | Version.indexedAnnotation Element javax.jdo.annotations.Version String indexed Whether the version column(s) is(are) indexed. Returns: whether the version column(s) is(are) indexed Default value: "" Since: JDO 2.1 |
