/*
 * DBeaver - Universal Database Manager
 * Copyright (C) 2010-2017 Serge Rider (serge@jkiss.org)
 *
 * Licensed 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.jkiss.dbeaver.ext.mysql.model;

import org.jkiss.code.NotNull;
import org.jkiss.code.Nullable;
import org.jkiss.dbeaver.model.exec.jdbc.JDBCDatabaseMetaData;
import org.jkiss.dbeaver.model.impl.jdbc.JDBCDataSource;
import org.jkiss.dbeaver.model.impl.jdbc.JDBCSQLDialect;
import org.jkiss.dbeaver.model.impl.sql.BasicSQLDialect;
import org.jkiss.utils.ArrayUtils;

import java.util.Arrays;
import java.util.Collections;

/**
* MySQL dialect
*/
class MySQLDialect extends JDBCSQLDialect {

    public static final String[] MYSQL_NON_TRANSACTIONAL_KEYWORDS = ArrayUtils.concatArrays(
        BasicSQLDialect.NON_TRANSACTIONAL_KEYWORDS,
        new String[]{
            "USE", "SHOW",
            "CREATE", "ALTER", "DROP",
            "EXPLAIN", "DESCRIBE", "DESC" }
    );

    public MySQLDialect() {
        super("MySQL");
    }

    public void initDriverSettings(JDBCDataSource dataSource, JDBCDatabaseMetaData metaData) {
        super.initDriverSettings(dataSource, metaData);
        //addSQLKeyword("STATISTICS");
        Collections.addAll(tableQueryWords, "EXPLAIN", "DESCRIBE", "DESC");
        addFunctions(Arrays.asList("SLEEP"));
    }

    @Nullable
    @Override
    public String getScriptDelimiterRedefiner() {
        return "DELIMITER";
    }

    @NotNull
    @Override
    public MultiValueInsertMode getMultiValueInsertMode() {
        return MultiValueInsertMode.GROUP_ROWS;
    }

    @Override
    public boolean supportsAliasInSelect() {
        return true;
    }

    @Override
    public boolean supportsCommentQuery() {
        return true;
    }

    @Override
    public String[] getSingleLineComments() {
        return new String[] { "-- ", "#" };
    }

    @Override
    public String getTestSQL() {
        return "SELECT 1";
    }

    @NotNull
    protected String[] getNonTransactionKeywords() {
        return MYSQL_NON_TRANSACTIONAL_KEYWORDS;
    }

}