com.rapiddweller.jdbacl.dialect.PostgreSQL10Dialect Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of rd-lib-jdbacl Show documentation

'jdbacl' stands for 'Java DataBase ACcess Layer' and provides utilities for accessing JDBC databases from Java programs, retrieving meta information in an object model and querying database data. 'rapiddweller jdbacl' is forked from Databene jdbacl by Volker Bergmann.

The newest version!

/*
 * (c) Copyright 2008-2012 by Volker Bergmann. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, is permitted under the terms of the
 * GNU General Public License.
 *
 * For redistributing this software or a derivative work under a license other
 * than the GPL-compatible Free Software License as defined by the Free
 * Software Foundation or approved by OSI, you must first obtain a commercial
 * license to this software product from Volker Bergmann.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * WITHOUT A WARRANTY OF ANY KIND. ALL EXPRESS OR IMPLIED CONDITIONS,
 * REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE
 * HEREBY EXCLUDED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

package com.rapiddweller.jdbacl.dialect;

import com.rapiddweller.common.ArrayBuilder;
import com.rapiddweller.jdbacl.DBUtil;
import com.rapiddweller.jdbacl.model.DBSequence;

import java.math.BigInteger;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.List;

/**
 * Handles theses changes from PostgresSQL 10:
 *
 * 
 *      sequence handling (see https://github.com/rails/rails/pull/28864)
 * 
 *
 * @since 1.1.12
 */
public class PostgreSQL10Dialect extends PostgreSQLDialect {

  @Override
  public DBSequence[] querySequences(Connection connection) throws SQLException {
    // query sequence names
    List rows = DBUtil.query("select relname from pg_class where relkind = 'S'", connection);
    ArrayBuilder builder = new ArrayBuilder<>(DBSequence.class, rows.size());
    for (Object[] row : rows) {
      String name = (String) row[0];
      // query sequence details
      List seqRows = DBUtil.query(String.format("select sequencename, start_value, increment_by, " +
              "max_value, min_value, cycle, cache_size, last_value, schemaname, sequenceowner from pg_sequences WHERE sequencename = '%s'", name),
          connection);
      for (Object[] details : seqRows) {
        DBSequence sequence = new DBSequence(name, details[9].toString(), details[8].toString());
        sequence.setStart(new BigInteger(details[1].toString()));
        sequence.setIncrement(new BigInteger(details[2].toString()));
        sequence.setMaxValue(new BigInteger(details[3].toString()));
        sequence.setMinValue(new BigInteger(details[4].toString()));
        sequence.setCycle(Boolean.valueOf(details[5].toString()));
        sequence.setCache(Long.parseLong(details[6].toString()));
        sequence.setLastNumber(details[7] != null ? new BigInteger(details[7].toString()) : BigInteger.ZERO);
        builder.add(sequence);
      }
    }
    return builder.toArray();
  }
}