liquibase.ext.teradata.sqlgenerator.RenameColumnGeneratorTeradata Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of liquibase-teradata Show documentation

Liquibase extensions for Teradata.

There is a newer version: 4.31.0

/**
 * Copyright 2010 Open Pricer
 *
 * 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 liquibase.ext.teradata.sqlgenerator;

import liquibase.database.Database;
import liquibase.ext.teradata.database.TeradataDatabase;
import liquibase.sql.Sql;
import liquibase.sql.UnparsedSql;
import liquibase.sqlgenerator.SqlGeneratorChain;
import liquibase.sqlgenerator.core.RenameColumnGenerator;
import liquibase.statement.core.AddColumnStatement;
import liquibase.statement.core.RenameColumnStatement;

/**
 *  Teradata specific syntax for column renaming
 *
 */
public class RenameColumnGeneratorTeradata extends RenameColumnGenerator {

    @Override
    public int getPriority() {
        return PRIORITY_DATABASE;
    }

	@Override
	public boolean supports(RenameColumnStatement statement, Database database) {
		return database instanceof TeradataDatabase;
	}

	/**
	 * @see liquibase.sqlgenerator.core.RenameColumnGenerator#generateSql(liquibase.statement.core.RenameColumnStatement, liquibase.database.Database, liquibase.sqlgenerator.SqlGeneratorChain)
	 */
	@Override
	public Sql[] generateSql(RenameColumnStatement statement, Database database, SqlGeneratorChain sqlGeneratorChain) {
		String sql = "ALTER TABLE " + database.escapeTableName(statement.getCatalogName(), statement.getSchemaName(), statement.getTableName())
                + " RENAME " + database.escapeColumnName(statement.getCatalogName(), statement.getSchemaName(), statement.getTableName(), statement.getOldColumnName())
                + " TO " + database.escapeColumnName(statement.getCatalogName(), statement.getSchemaName(), statement.getTableName(), statement.getNewColumnName());
		return new Sql[] {
				new UnparsedSql(sql)
		};
	}
}