Package org.springframework.data.cassandra.core.mapping

Annotation Interface SASI

@Documented
@Retention(RUNTIME)
@Target({FIELD,METHOD,ANNOTATION_TYPE})
public @interface SASI

Identifies a secondary index using SASI indexing on a single column.

SASI uses significantly using fewer memory, disk, and CPU resources. It enables querying with PREFIX and CONTAINS on strings, similar to the SQL implementation of LIKE = "foo*" or LIKE = "*foo*".

 @Table
 class Person {

        @SASI(analyzed = true, indexMode = CONTAINS) @StandardAnalyzed("en") String names; // allows LIKE queries
        @SASI int age // allows age >= … queries;
 }
 

SASI indexing can apply an analyzer that is applied during indexing. Annotation-based indexing supports standard analyzer and non-tokenizing analyzer.

Since:

2.0

Author:

Mark Paluch

See Also:

• SASI.StandardAnalyzed
• SASI.NonTokenizingAnalyzed

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	SASI.IndexMode
static @interface	SASI.NonTokenizingAnalyzed	Apply non-tokenizing analyzer to SASI indexing.
static enum	SASI.Normalization
static @interface	SASI.StandardAnalyzed	Apply standard analyzer to SASI indexing.

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element	Description
SASI.IndexMode	indexMode	The name of the index.
String	value	The name of the index.

Element Details

value

String value

The name of the index. If null or empty, then the index name will be generated by Cassandra and will be unknown unless column metadata is used to discover the generated index name.

Default:

""

indexMode

SASI.IndexMode indexMode

The name of the index. If null or empty, then the index name will be generated by Cassandra and will be unknown unless column metadata is used to discover the generated index name.

Default:

PREFIX