VerticaMetaModel.java

/*
 * 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.vertica.model;

import org.jkiss.code.NotNull;
import org.jkiss.code.Nullable;
import org.jkiss.dbeaver.DBException;
import org.jkiss.dbeaver.Log;
import org.jkiss.dbeaver.ext.generic.model.GenericDataSource;
import org.jkiss.dbeaver.ext.generic.model.GenericProcedure;
import org.jkiss.dbeaver.ext.generic.model.GenericTable;
import org.jkiss.dbeaver.ext.generic.model.meta.GenericMetaModel;
import org.jkiss.dbeaver.model.DBPEvaluationContext;
import org.jkiss.dbeaver.model.DBUtils;
import org.jkiss.dbeaver.model.exec.DBCQueryTransformProvider;
import org.jkiss.dbeaver.model.exec.DBCQueryTransformType;
import org.jkiss.dbeaver.model.exec.DBCQueryTransformer;
import org.jkiss.dbeaver.model.exec.jdbc.JDBCPreparedStatement;
import org.jkiss.dbeaver.model.exec.jdbc.JDBCResultSet;
import org.jkiss.dbeaver.model.exec.jdbc.JDBCSession;
import org.jkiss.dbeaver.model.impl.sql.QueryTransformerLimit;
import org.jkiss.dbeaver.model.runtime.DBRProgressMonitor;

import java.sql.SQLException;

/**
 * VerticaMetaModel
 */
public class VerticaMetaModel extends GenericMetaModel implements DBCQueryTransformProvider
{
    private static final Log log = Log.getLog(VerticaMetaModel.class);

    public VerticaMetaModel() {
        super();
    }

    @Override
    public String getTableDDL(DBRProgressMonitor monitor, GenericTable sourceObject) throws DBException {
        GenericDataSource dataSource = sourceObject.getDataSource();
        try (JDBCSession session = DBUtils.openMetaSession(monitor, dataSource, "Read Vertica object definition")) {
            try (JDBCPreparedStatement dbStat = session.prepareStatement("SELECT EXPORT_OBJECTS('','" + sourceObject.getFullyQualifiedName(DBPEvaluationContext.DML) + "');")) {
                try (JDBCResultSet dbResult = dbStat.executeQuery()) {
                    StringBuilder sql = new StringBuilder();
                    while (dbResult.nextRow()) {
                        sql.append(dbResult.getString(1));
                    }
                    return sql.toString();
                }
            }
        } catch (SQLException e) {
            throw new DBException(e, dataSource);
        }
    }

    public String getViewDDL(DBRProgressMonitor monitor, GenericTable sourceObject) throws DBException {
        return getTableDDL(monitor, sourceObject);
    }

    @Override
    public String getProcedureDDL(DBRProgressMonitor monitor, GenericProcedure sourceObject) throws DBException {
        return super.getProcedureDDL(monitor, sourceObject);
    }

    @Nullable
    @Override
    public DBCQueryTransformer createQueryTransformer(@NotNull DBCQueryTransformType type) {
        if (type == DBCQueryTransformType.RESULT_SET_LIMIT) {
            return new QueryTransformerLimit(false);
        }
        return null;
    }
}