/*
* RHQ Management Platform
* Copyright (C) 2005-2008 Red Hat, Inc.
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
package org.rhq.core.db;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
/**
* Superclass of all versions of the SQL Server database.
*
* @author Joseph Marques
*/
public abstract class SQLServerDatabaseType extends DatabaseType {
public static final String SEQ_SUFFIX = "_ID_SEQ";
public static final String BAD_SEQ_NAME = "Sequences named must end in " + SEQ_SUFFIX;
public static final String SEQ_ERROR_MSG = "SQL Server does not support sequences, use identifier columns instead";
/**
* The vendor name for all SQL Server databases.
*/
public static final String VENDOR_NAME = "sqlserver";
/**
* Returns {@link #VENDOR_NAME}.
*
* @see DatabaseType#getVendor()
*/
public String getVendor() {
return VENDOR_NAME;
}
public String getHibernateDialect() {
return "org.hibernate.dialect.SQLServerDialect";
}
/**
* @see DatabaseType#isTableNotFoundException(SQLException)
*/
public boolean isTableNotFoundException(SQLException e) {
String msg = e.getMessage();
msg = (msg == null) ? "" : msg.trim().toLowerCase();
return msg.contains("invalid object name");
}
/**
* Assumes the sequence table is the value of the table argument followed by "_", the value of the key argument and
* then "_seq".
*
* @see DatabaseType#getSequenceValue(Connection, String, String)
*/
public int getSequenceValue(Connection conn, String table, String key) throws SQLException {
// if (true) so the compiler is fooled into believing there can be a return value
if (true) {
throw new FeatureNotSupportedException(SEQ_ERROR_MSG);
}
return 0;
}
/**
* @see DatabaseType#getNextSequenceValue(Connection, String, String)
*/
public int getNextSequenceValue(Connection conn, String table, String key) throws SQLException {
// if (true) so the compiler is fooled into believing there can be a return value
if (true) {
throw new FeatureNotSupportedException(SEQ_ERROR_MSG);
}
return 0;
}
/**
* @see DatabaseType#alterColumn(Connection, String, String, String, String, String, Boolean, Boolean)
*/
public void alterColumn(Connection conn, String table, String column, String generic_column_type,
String default_value, String precision, Boolean nullable, Boolean reindex) throws SQLException {
String db_column_type = null;
List<String> sql_list = new ArrayList<String>();
if (generic_column_type != null) {
db_column_type = getDBTypeFromGenericType(generic_column_type);
if (precision != null) {
db_column_type += " (" + precision + ")";
}
sql_list.add("ALTER TABLE " + table + " ALTER COLUMN " + column + " " + db_column_type);
}
if (default_value != null) {
sql_list.add("ALTER TABLE " + table + " ALTER COLUMN " + column + " SET DEFAULT '" + default_value + "'");
}
if (nullable != null) {
if (nullable.booleanValue()) {
sql_list.add("ALTER TABLE " + table + " ALTER " + column + " SET NULL");
} else {
sql_list.add("ALTER TABLE " + table + " ALTER " + column + " SET NOT NULL");
}
}
executeSql(conn, sql_list);
// now that we've altered the column, let's reindex if we were told to do so
if ((reindex != null) && reindex.booleanValue()) {
reindexTable(conn, table);
}
return;
}
/**
* @see DatabaseType#reindexTable(Connection, String)
*/
public void reindexTable(Connection conn, String table) throws SQLException {
// DBREINDEX( table_name [ , index_name [ , fillfactor ] ]
// quote table name
// pass " " for index_name, indicating all indexes should be rebuilt
// pass 0 for fillfactor, indicating previous fillfactor should be used
String reindexSql = "DBCC DBREINDEX (\"" + table + "\", \" \", 0)";
executeSql(conn, reindexSql);
}
/**
* @return false due to: http://support.microsoft.com/kb/321843
*/
@Override
public boolean supportsSelfReferringCascade() {
return false;
}
}