org.nuxeo.ecm.core.storage.sql.db

Class H2Fulltext

java.lang.Object

org.nuxeo.ecm.core.storage.sql.db.H2Fulltext

public class H2Fulltext
extends Object

An optimized Lucene-based fulltext indexing trigger and search.

Author:

H2 Group, Florent Guillaume

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	H2Fulltext.Trigger Trigger used to update the lucene index upon row change.

Method Summary

Methods

Modifier and Type	Method and Description
static void	createIndex(Connection conn, String indexName, String schema, String table, String columns, String analyzer) Creates a fulltext index for a table and column list.
static void	dropAll(Connection conn) Drops all fulltext indexes from the database.
static void	init(Connection conn) Initializes fulltext search functionality for this database.
static void	reindex(Connection conn) Re-creates the fulltext index for this database.
static ResultSet	search(Connection conn, String indexName, String text) Searches from the given full text index.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

init

public static void init(Connection conn)
                 throws SQLException

Initializes fulltext search functionality for this database. This adds the following Java functions to the database:

• NXFT_CREATE_INDEX(nameString, schemaString, tableString, columnListString, analyzerString)
• NXFT_REINDEX()
• NXFT_DROP_ALL()
• NXFT_SEARCH(queryString, limitInt, offsetInt): result set

It also adds a schema NXFT to the database where bookkeeping information is stored. This function may be called from a Java application, or by using the SQL statements:

  CREATE ALIAS IF NOT EXISTS NXFT_INIT FOR
      "org.nuxeo.ecm.core.storage.sql.db.H2Fulltext.init";
  CALL NXFT_INIT();
 

Parameters:

conn -

Throws:

SQLException

createIndex

public static void createIndex(Connection conn,
               String indexName,
               String schema,
               String table,
               String columns,
               String analyzer)
                        throws SQLException

Creates a fulltext index for a table and column list.

A table may have any number of indexes at a time, but the index name must be unique. If the index already exists, nothing is done, otherwise the index is created and populated from existing data.

Usually called through:

   CALL NXFT_CREATE_INDEX('indexname', 'myschema', 'mytable', ('col1', 'col2'), 'lucene.analyzer');
 

Parameters:

conn - the connection

indexName - the index name

schema - the schema name of the table

table - the table name

columns - the column list

analyzer - the Lucene fulltext analyzer class

Throws:

SQLException

reindex

public static void reindex(Connection conn)
                    throws SQLException

Re-creates the fulltext index for this database.

Throws:

SQLException

dropAll

public static void dropAll(Connection conn)
                    throws SQLException

Drops all fulltext indexes from the database.

Throws:

SQLException

search

public static ResultSet search(Connection conn,
               String indexName,
               String text)
                        throws SQLException

Searches from the given full text index. The returned result set has a single ID column which holds the keys for the matching rows.

Usually called through:

   SELECT * FROM NXFT_SEARCH(name, 'text');
 

Parameters:

conn - the connection

indexName - the index name

text - the search query

Returns:

the result set

Throws:

SQLException