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HSQLDB example source code file (PostgresTransferHelper.java)
The HSQLDB PostgresTransferHelper.java source code/* Copyright (c) 2001-2008, The HSQL Development Group * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * Neither the name of the HSQL Development Group nor the names of its * contributors may be used to endorse or promote products derived from this * software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG, * 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 org.hsqldb.util; import java.sql.ResultSet; import java.sql.ResultSetMetaData; import java.sql.SQLException; import java.sql.Types; // fredt@users 20020215 - patch 516309 by Nicolas Bazin - transfer PostgresSQL // sqlbob@users 20020325 - patch 1.7.0 - reengineering /** * Conversions from PostgresSQL databases * * @author Nichola Bazin * @version 1.7.0 */ class PostgresTransferHelper extends TransferHelper { private final int PostgreSQL = 0; private final int HSQLDB = 1; String[][] Funcs = { { "now()", "\'now\'" } }; PostgresTransferHelper() { super(); } PostgresTransferHelper(TransferDb database, Traceable t, String q) { super(database, t, q); } int convertToType(int type) { if (type == Types.DECIMAL) { type = Types.NUMERIC; tracer.trace("Converted DECIMAL to NUMERIC"); } return (type); } String fixupColumnDefRead(TransferTable t, ResultSetMetaData meta, String columnType, ResultSet columnDesc, int columnIndex) throws SQLException { String SeqName = new String("_" + columnDesc.getString(4) + "_seq"); int spaceleft = 31 - SeqName.length(); if (t.Stmts.sDestTable.length() > spaceleft) { SeqName = t.Stmts.sDestTable.substring(0, spaceleft) + SeqName; } else { SeqName = t.Stmts.sDestTable + SeqName; } String CompareString = "nextval(\'\"" + SeqName + "\"\'"; if (columnType.indexOf(CompareString) >= 0) { // We just found a increment columnType = "SERIAL"; } for (int Idx = 0; Idx < Funcs.length; Idx++) { String PostgreSQL_func = Funcs[Idx][PostgreSQL]; int iStartPos = columnType.indexOf(PostgreSQL_func); if (iStartPos >= 0) { String NewColumnType = columnType.substring(0, iStartPos); NewColumnType += Funcs[Idx][HSQLDB]; NewColumnType += columnType.substring(iStartPos + PostgreSQL_func.length()); columnType = NewColumnType; } } return (columnType); } String fixupColumnDefWrite(TransferTable t, ResultSetMetaData meta, String columnType, ResultSet columnDesc, int columnIndex) throws SQLException { if (columnType.equals("SERIAL")) { String SeqName = new String("_" + columnDesc.getString(4) + "_seq"); int spaceleft = 31 - SeqName.length(); if (t.Stmts.sDestTable.length() > spaceleft) { SeqName = t.Stmts.sDestTable.substring(0, spaceleft) + SeqName; } else { SeqName = t.Stmts.sDestTable + SeqName; } String DropSequence = "DROP SEQUENCE " + SeqName + ";"; t.Stmts.sDestDrop += DropSequence; } for (int Idx = 0; Idx < Funcs.length; Idx++) { String HSQLDB_func = Funcs[Idx][HSQLDB]; int iStartPos = columnType.indexOf(HSQLDB_func); if (iStartPos >= 0) { String NewColumnType = columnType.substring(0, iStartPos); NewColumnType += Funcs[Idx][PostgreSQL]; NewColumnType += columnType.substring(iStartPos + HSQLDB_func.length()); columnType = NewColumnType; } } return (columnType); } void beginDataTransfer() { try { db.setAutoCommit(false); } catch (Exception e) {} } void endDataTransfer() { try { db.commit(); db.execute("VACUUM ANALYZE"); } catch (Exception e) {} } } Other HSQLDB examples (source code examples)Here is a short list of links related to this HSQLDB PostgresTransferHelper.java source code file: |
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