org.tentackle.sql.backends.PostgresScriptRunner Maven / Gradle / Ivy
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/*
* Tentackle - https://tentackle.org
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.tentackle.sql.backends;
import org.tentackle.sql.Backend;
import org.tentackle.sql.BackendException;
import org.tentackle.sql.DefaultScriptRunner;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
/**
* Script runner for postgres.
*/
public class PostgresScriptRunner extends DefaultScriptRunner {
/**
* Creates a script runner.
*
* @param backend the backend
* @param connection the SQL connection
* @see AbstractBackend#createScriptRunner(Connection)
*/
public PostgresScriptRunner(Backend backend, Connection connection) {
super(backend, connection);
}
@Override
protected boolean determinePosixEscapeSyntaxSupported() {
// depends on the connection settings
try (Statement statement = getConnection().createStatement()) {
ResultSet resultSet = statement.executeQuery("SELECT setting FROM pg_settings WHERE name = 'standard_conforming_strings'");
if (resultSet.next()) {
String setting = resultSet.getString(1);
return "off".equals(setting);
}
return false;
}
catch (SQLException ex) {
throw new BackendException("cannot determine posix escape syntax support", ex);
}
}
}