org.apache.jena.sdb.layout2.hash.FmtLayout2HashH2 Maven / Gradle / Ivy

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SDB is a persistence layer for use with Apache Jena that uses an SQL database to store triples/quads.
There is a newer version: 3.17.0
/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.jena.sdb.layout2.hash;
/* H2 contribution from Martin HEIN (m#)/March 2008 */

import static org.apache.jena.sdb.sql.SQLUtils.sqlStr ;

import java.sql.SQLException;

import org.apache.jena.sdb.layout2.* ;
import org.apache.jena.sdb.sql.SDBConnection ;
import org.apache.jena.sdb.sql.SDBExceptionSQL ;


public class FmtLayout2HashH2 extends FmtLayout2
{
    //static private Logger log = LoggerFactory.getLogger(FormatterTriplesNodesH2.class) ;
    
    public FmtLayout2HashH2(SDBConnection connection)
    { 
        super(connection) ;
    }

    @Override
    protected void formatTableTriples()
    {
        String tname = TableDescTriples.name() ;
        dropTable(tname) ;
        try { 
            connection().exec(sqlStr(
                                 "CREATE TABLE "+tname+" (",
                                 "    s BIGINT NOT NULL,",
                                 "    p BIGINT NOT NULL,",
                                 "    o BIGINT NOT NULL,",
                                 "    PRIMARY KEY (s, p, o)",
                                 ")"                
                    )) ;
        } catch (SQLException ex)
        { throw new SDBExceptionSQL("SQLException formatting table '"+TableDescTriples.name()+"'",ex) ; }
    }
    
    @Override
    protected void formatTableQuads()
    {
        String tname = TableDescQuads.name() ;
        dropTable(tname) ;
        try { 
            connection().exec(sqlStr(
                                 "CREATE TABLE "+tname+" (",
                                 "    g BIGINT NOT NULL,",
                                 "    s BIGINT NOT NULL,",
                                 "    p BIGINT NOT NULL,",
                                 "    o BIGINT NOT NULL,",
                                 "    PRIMARY KEY (g, s, p, o)",
                                 ")"                
                    )) ;
        } catch (SQLException ex)
        { throw new SDBExceptionSQL("SQLException formatting table '"+TableDescTriples.name()+"'",ex) ; }
    }

    @Override
    protected String syntaxDropIndex(String indexName, String table)
    {
        return String.format("DROP INDEX IF EXISTS %s", indexName) ;
    }

    @Override
    protected void formatTableNodes()
    {
        String tname = TableDescNodes.name() ;
        dropTable(tname) ;
        try { 
            connection().exec(sqlStr ("CREATE TABLE "+tname+" (",
                                       "   hash BIGINT NOT NULL,",
                                       "   lex CLOB NOT NULL,",
                                       "   lang varchar NOT NULL default E'',",
                                       "   datatype varchar("+TableDescNodes.DatatypeUriLength+") NOT NULL default '',",
                                       "   type integer NOT NULL default E'0',",
                                       "   PRIMARY KEY (hash)",
                                       ")"
                    )) ;
        } catch (SQLException ex)
        {
            throw new SDBExceptionSQL("SQLException formatting table '"+TableDescNodes.name()+"'",ex) ;
        }
    }

    @Override
    protected void formatTablePrefixes()
    {
        String tname = TablePrefixes.name() ;
        dropTable(tname) ;
        try { 
            connection().exec(sqlStr(
                                      "CREATE TABLE "+tname+" (",
                                      "    prefix VARCHAR("+TablePrefixes.prefixColWidth+") NOT NULL ,",
                                      "    uri VARCHAR("+TablePrefixes.uriColWidth+") NOT NULL ,", 
                                      "    CONSTRAINT "+tname+"_PK PRIMARY KEY  (prefix)",
                                      ")"            
                    )) ;
        } catch (SQLException ex)
        {
            throw new SDBExceptionSQL("SQLException resetting table '"+TablePrefixes.name()+"'",ex) ;
        }
    }
}