/* This file is part of VoltDB.
* Copyright (C) 2008-2017 VoltDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with VoltDB. If not, see <http://www.gnu.org/licenses/>.
*/
package org.voltdb.compiler.statements;
import java.util.regex.Matcher;
import org.voltdb.catalog.CatalogMap;
import org.voltdb.catalog.Database;
import org.voltdb.catalog.Group;
import org.voltdb.compiler.DDLCompiler;
import org.voltdb.compiler.DDLCompiler.DDLStatement;
import org.voltdb.compiler.DDLCompiler.StatementProcessor;
import org.voltdb.compiler.VoltCompiler.DdlProceduresToLoad;
import org.voltdb.compiler.VoltCompiler.VoltCompilerException;
import org.voltdb.parser.SQLParser;
/**
* Process CREATE ROLE role-name [WITH permission [,...]]
*/
public class DropRole extends StatementProcessor {
public DropRole(DDLCompiler ddlCompiler) {
super(ddlCompiler);
}
@Override
protected boolean processStatement(DDLStatement ddlStatement, Database db, DdlProceduresToLoad whichProcs)
throws VoltCompilerException {
// matches if it is DROP ROLE
// group 1 is role name
Matcher statementMatcher = SQLParser.matchDropRole(ddlStatement.statement);
if (! statementMatcher.matches()) {
return false;
}
String roleName = statementMatcher.group(1).toUpperCase();
boolean ifExists = (statementMatcher.group(2) != null);
CatalogMap<Group> groupMap = db.getGroups();
if (groupMap.get(roleName) == null) {
if (!ifExists) {
throw m_compiler.new VoltCompilerException(String.format(
"Role name \"%s\" in DROP ROLE statement does not exist.",
roleName));
}
else {
return true;
}
}
else {
// Hand-check against the two default roles which shall not be
// dropped.
if (roleName.equals("ADMINISTRATOR") || roleName.equals("USER")) {
throw m_compiler.new VoltCompilerException(String.format(
"You may not drop the built-in role \"%s\".",
roleName));
}
// The constraint that there be no users with this role gets
// checked by the deployment validation. *HOWEVER*, right now
// this ends up giving a confusing error message.
groupMap.delete(roleName);
}
return true;
}
}