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/*
* SonarQube
* Copyright (C) 2009-2016 SonarSource SA
* mailto:contact AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.sonar.db.charset;
import com.google.common.annotations.VisibleForTesting;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
import org.sonar.api.utils.log.Logger;
import org.sonar.api.utils.log.Loggers;
import static com.google.common.collect.FluentIterable.from;
import static java.lang.String.format;
import static org.apache.commons.lang.StringUtils.endsWithIgnoreCase;
class MssqlCharsetHandler extends CharsetHandler {
private static final Logger LOGGER = Loggers.get(MssqlCharsetHandler.class);
protected MssqlCharsetHandler(SqlExecutor selectExecutor) {
super(selectExecutor);
}
@Override
void handle(Connection connection, boolean enforceUtf8) throws SQLException {
LOGGER.info("Verify that database collation is case-sensitive and accent-sensitive");
checkCollation(connection);
}
private void checkCollation(Connection connection) throws SQLException {
// All VARCHAR columns are returned. No need to check database general collation.
// Example of row:
// issues | kee | Latin1_General_CS_AS
List<ColumnDef> columns = select(connection,
ColumnDef.SELECT_COLUMNS +
"FROM [INFORMATION_SCHEMA].[COLUMNS] " +
"WHERE collation_name is not null " +
"ORDER BY table_name,column_name", ColumnDef.ColumnDefRowConverter.INSTANCE);
for (ColumnDef column : from(columns).filter(ColumnDef.IsInSonarQubeTablePredicate.INSTANCE)) {
if (!endsWithIgnoreCase(column.getCollation(), "_CS_AS")) {
repairColumnCollation(connection, column);
}
}
}
private void repairColumnCollation(Connection connection, ColumnDef column) throws SQLException {
// 1. select the indices defined on this column
String selectIndicesSql = format("SELECT I.name as index_name, I.is_unique as unik, IndexedColumns " +
" FROM sys.indexes I " +
" JOIN sys.tables T ON T.Object_id = I.Object_id " +
" JOIN (SELECT * FROM ( " +
" SELECT IC2.object_id, IC2.index_id, " +
" STUFF((SELECT ' ,' + C.name " +
" FROM sys.index_columns IC1 " +
" JOIN sys.columns C " +
" ON C.object_id = IC1.object_id " +
" AND C.column_id = IC1.column_id " +
" AND IC1.is_included_column = 0 " +
" WHERE IC1.object_id = IC2.object_id " +
" AND IC1.index_id = IC2.index_id " +
" GROUP BY IC1.object_id,C.name,index_id " +
" ORDER BY MAX(IC1.key_ordinal) " +
" FOR XML PATH('')), 1, 2, '') IndexedColumns " +
" FROM sys.index_columns IC2 " +
" GROUP BY IC2.object_id ,IC2.index_id) tmp1 )tmp2 " +
" ON I.object_id = tmp2.object_id AND I.Index_id = tmp2.index_id " +
" WHERE I.is_primary_key = 0 AND I.is_unique_constraint = 0 " +
" and T.name =('%s') " +
" and CHARINDEX ('%s',IndexedColumns)>0", column.getTable(), column.getColumn());
List<ColumnIndex> indices = getSqlExecutor().executeSelect(connection, selectIndicesSql, ColumnIndexConverter.INSTANCE);
// 2. drop indices
for (ColumnIndex index : indices) {
getSqlExecutor().executeUpdate(connection, format("DROP INDEX %s.%s", column.getTable(), index.name));
}
// 3. alter collation of column
String csCollation = toCaseSensitive(column.getCollation());
String nullability = column.isNullable() ? "NULL" : "NOT NULL";
String size = column.getSize() >= 0 ? String.valueOf(column.getSize()) : "max";
String alterSql = format("ALTER TABLE %s ALTER COLUMN %s %s(%s) COLLATE %s %s",
column.getTable(), column.getColumn(), column.getDataType(), size, csCollation, nullability);
LOGGER.info("Changing collation of column [{}.{}] from {} to {} | sql=", column.getTable(), column.getColumn(), column.getCollation(), csCollation, alterSql);
getSqlExecutor().executeUpdate(connection, alterSql);
// 4. re-create indices
for (ColumnIndex index : indices) {
String uniqueSql = index.unique ? "UNIQUE" : "";
String createIndexSql = format("CREATE %s INDEX %s ON %s (%s)", uniqueSql, index.name, column.getTable(), index.csvColumns);
getSqlExecutor().executeUpdate(connection, createIndexSql);
}
}
@VisibleForTesting
static String toCaseSensitive(String ciCollation) {
// Example: Latin1_General_CI_AI --> Latin1_General_CS_AS
return ciCollation.substring(0, ciCollation.length() - "_CI_AI".length()) + "_CS_AS";
}
@VisibleForTesting
static class ColumnIndex {
private final String name;
private final boolean unique;
private final String csvColumns;
public ColumnIndex(String name, boolean unique, String csvColumns) {
this.name = name;
this.unique = unique;
this.csvColumns = csvColumns;
}
}
@VisibleForTesting
enum ColumnIndexConverter implements SqlExecutor.RowConverter<ColumnIndex> {
INSTANCE;
@Override
public ColumnIndex convert(ResultSet rs) throws SQLException {
return new ColumnIndex(rs.getString(1), rs.getBoolean(2), rs.getString(3));
}
}
}
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