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/*
 * Copyright (c) 2009-2016, Data Geekery GmbH (http://www.datageekery.com)
 * All rights reserved.
 *
 * 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.
 *
 * Other licenses:
 * -----------------------------------------------------------------------------
 * Commercial licenses for this work are available. These replace the above
 * ASL 2.0 and offer limited warranties, support, maintenance, and commercial
 * database integrations.
 *
 * For more information, please visit: http://www.jooq.org/licenses
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 */
package org.jooq.impl;

import static org.jooq.impl.DSL.function;
import static org.jooq.impl.DSL.inline;

import org.jooq.Configuration;
import org.jooq.Field;

/**
 * @author Lukas Eder
 */
final class CurrentSchema extends AbstractFunction {

    /**
     * Generated UID
     */
    private static final long serialVersionUID = -7273879239726265322L;

    CurrentSchema() {
        super("current_schema", SQLDataType.VARCHAR);
    }

    @Override
    final Field getFunction0(Configuration configuration) {
        switch (configuration.family()) {














            case CUBRID:
            case FIREBIRD:
            case SQLITE:
                return inline("");

            case DERBY:
                return DSL.field("{current schema}", String.class);

            case H2:
                return DSL.field("{schema}()", String.class);

            case MARIADB:
            case MYSQL:
                return DSL.field("{database}()", String.class);

            case HSQLDB:
            case POSTGRES:
                return DSL.field("{current_schema}", String.class);
        }

        return function("current_schema", String.class);
    }
}