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1 /*
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2 Copyright (c) 2008 Franklin Schmidt <fschmidt@gmail.com>
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3
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4 Permission is hereby granted, free of charge, to any person obtaining a copy
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5 of this software and associated documentation files (the "Software"), to deal
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6 in the Software without restriction, including without limitation the rights
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7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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8 copies of the Software, and to permit persons to whom the Software is
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9 furnished to do so, subject to the following conditions:
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10
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11 The above copyright notice and this permission notice shall be included in
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12 all copies or substantial portions of the Software.
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13
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14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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20 THE SOFTWARE.
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21 */
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22
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23 package fschmidt.db.postgres;
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24
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25 import java.sql.Connection;
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26 import java.sql.PreparedStatement;
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27 import java.sql.Savepoint;
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28 import java.sql.SQLException;
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29 import fschmidt.db.DbArcana;
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30
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31
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32 public final class DbDatabaseImpl extends fschmidt.db.base.DbDatabaseImpl implements DbArcana {
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33
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34 public DbDatabaseImpl(String url,String user,String password) {
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35 super(url,user,password);
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36 try {
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37 Class.forName("org.postgresql.Driver");
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38 } catch(ClassNotFoundException e) {
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39 throw new RuntimeException(e);
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40 }
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41 }
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42
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43 public DbArcana arcana() {
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44 return this;
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45 }
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46
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47 public String quoteIdentifier(String identifier) {
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48 return "\"" + identifier + "\"";
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49 }
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50
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51 public String getLastSeqValFn() {
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52 return "lastval()";
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53 }
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54
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55 public String dateSub(String date,int n,String units) {
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56 return "(" + date + " - interval '" + n + " " + units + "')";
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57 }
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58
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59 public static int executeUpdateIgnoringDuplicateKeys(PreparedStatement stmt)
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60 throws SQLException
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61 {
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62 PostgresExceptionHandler peh = new PostgresExceptionHandler(stmt);
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63 try {
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64 return stmt.executeUpdate();
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65 } catch(SQLException e) {
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66 if( e.getMessage().startsWith("ERROR: duplicate key value violates unique constraint ") ) {
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67 peh.handleException();
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68 return 0;
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69 }
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70 throw e;
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71 } finally {
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72 peh.close();
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73 }
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74 }
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75
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76 }
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