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Indexes.md

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Manipulating indexes

These functions implement the HTTP API for manipulating indexes.

ArangoCollection.ensureHashIndex

ArangoCollection.ensureHashIndex(Iterable<String> fields, HashIndexOptions options) : IndexEntity

Creates a hash index for the collection if it does not already exist.

Arguments

  • fields: Iterable<String>

    A list of attribute paths

  • options: HashIndexOptions

    • unique: Boolean

      If true, then create a unique index

    • sparse: Boolean

      If true, then create a sparse index

    • deduplicate: Boolean

      If false, the deduplication of array values is turned off.

Examples

ArangoDB arango = new ArangoDB.Builder().build();
ArangoDatabase db = arango.db("myDB");
ArangoCollection collection = db.collection("some-collection");

IndexEntity index = collection.ensureHashIndex(Arrays.asList("a", "b.c"));
// the index has been created with the handle `index.getId()`

ArangoCollection.ensureSkipListIndex

ArangoCollection.ensureSkipListIndex(Iterable<String> fields, SkipListIndexOptions options) : IndexEntity

Creates a skip-list index for the collection if it does not already exist.

Arguments

  • fields: Iterable<String>

    A list of attribute paths

  • options: SkipListIndexOptions

    • unique: Boolean

      If true, then create a unique index

    • sparse: Boolean

      If true, then create a sparse index

    • deduplicate: Boolean

      If false, the deduplication of array values is turned off.

Examples

ArangoDB arango = new ArangoDB.Builder().build();
ArangoDatabase db = arango.db("myDB");
ArangoCollection collection = db.collection("some-collection");

IndexEntity index = collection.ensureSkipListIndex(Arrays.asList("a", "b.c"));
// the index has been created with the handle `index.getId()`

ArangoCollection.ensureGeoIndex

ArangoCollection.ensureGeoIndex(Iterable<String> fields, GeoIndexOptions options) : IndexEntity

Creates a geo index for the collection if it does not already exist.

Arguments

  • fields: Iterable<String>

    A list of attribute paths

  • options: GeoIndexOptions

    • geoJson: Boolean

      If a geo-spatial index on a location is constructed and geoJson is true, then the order within the array is longitude followed by latitude. This corresponds to the format described in.

Examples

ArangoDB arango = new ArangoDB.Builder().build();
ArangoDatabase db = arango.db("myDB");
ArangoCollection collection = db.collection("some-collection");

IndexEntity index = collection.ensureGeoIndex(Arrays.asList("latitude", "longitude"));
// the index has been created with the handle `index.getId()`

ArangoCollection.ensureFulltextIndex

ArangoCollection.ensureFulltextIndex(Iterable<String> fields, FulltextIndexOptions options) : IndexEntity

Creates a fulltext index for the collection if it does not already exist.

Arguments

  • fields: Iterable<String>

    A list of attribute paths

  • options: FulltextIndexOptions

    • minLength: Integer

      Minimum character length of words to index. Will default to a server-defined value if unspecified. It is thus recommended to set this value explicitly when creating the index.

Examples

ArangoDB arango = new ArangoDB.Builder().build();
ArangoDatabase db = arango.db("myDB");
ArangoCollection collection = db.collection("some-collection");

IndexEntity index = collection.ensureFulltextIndex(Arrays.asList("description"));
// the index has been created with the handle `index.getId()`

ArangoCollection.ensurePersistentIndex

ArangoCollection.ensurePersistentIndex(Iterable<String> fields, PersistentIndexOptions options) : IndexEntity

Creates a persistent index for the collection if it does not already exist.

Arguments

  • fields: Iterable<String>

    A list of attribute paths

  • options: PersistentIndexOptions

    • unique: Boolean

      If true, then create a unique index

    • sparse: Boolean

      If true, then create a sparse index

Examples

ArangoDB arango = new ArangoDB.Builder().build();
ArangoDatabase db = arango.db("myDB");
ArangoCollection collection = db.collection("some-collection");

IndexEntity index = collection.ensurePersistentIndex(Arrays.asList("a", "b.c"));
// the index has been created with the handle `index.getId()`

ArangoCollection.getIndex

ArangoCollection.getIndex(String id) : IndexEntity

Fetches information about the index with the given id and returns it.

Arguments

  • id: String

    The index-handle

Examples

ArangoDB arango = new ArangoDB.Builder().build();
ArangoDatabase db = arango.db("myDB");
ArangoCollection collection = db.collection("some-collection");

IndexEntity index = collection.getIndex("some-index");

ArangoCollection.getIndexes

ArangoCollection.getIndexes() : Collection<IndexEntity>

Fetches a list of all indexes on this collection.

Examples

ArangoDB arango = new ArangoDB.Builder().build();
ArangoDatabase db = arango.db("myDB");
ArangoCollection collection = db.collection("some-collection");

Collection<IndexEntity> indexes = collection.getIndexs();

ArangoCollection.deleteIndex

ArangoCollection.deleteIndex(String id) : String

Deletes the index with the given id from the collection.

Arguments

  • id: String

    The index-handle

Examples

ArangoDB arango = new ArangoDB.Builder().build();
ArangoDatabase db = arango.db("myDB");
ArangoCollection collection = db.collection("some-collection");

collection.deleteIndex("some-index");