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annotate tests/Test_Rpositioning.java @ 261:d4baf8a4b43a

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Update Copyright year to 2019
author Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
date Thu, 03 Jan 2019 14:43:44 +0100 (2019-01-03)
parents c38d4eaf5479
children 54137aeb1f92
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1 /*
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2 * This Source Code Form is subject to the terms of the Mozilla Public
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3 * License, v. 2.0. If a copy of the MPL was not distributed with this
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4 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
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5 *
261
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6 * Copyright 1997 - July 2008 CWI, August 2008 - 2019 MonetDB B.V.
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7 */
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8
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9 import java.sql.*;
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10
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11 public class Test_Rpositioning {
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12 public static void main(String[] args) throws Exception {
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04fbf3655452 Disable Class.forName("nl.cwi.monetdb.jdbc.MonetDriver"); code
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13 // Class.forName("nl.cwi.monetdb.jdbc.MonetDriver"); // not needed anymore for self registering JDBC drivers
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14 Connection con = DriverManager.getConnection(args[0]);
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15 Statement stmt = con.createStatement();
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16 DatabaseMetaData dbmd = con.getMetaData();
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17
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18 // get a one rowed resultset
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19 ResultSet rs = stmt.executeQuery("SELECT 1");
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20
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21 // >> true: we should be before the first result now
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22 System.out.println("1. true\t" + rs.isBeforeFirst());
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23 // >> false: we're not at the first result
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24 System.out.println("2. false\t" + rs.isFirst());
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25 // >> true: there is one result, so we can call next once
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26 System.out.println("3. true\t" + rs.next());
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27 // >> false: we're not before the first row anymore
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28 System.out.println("4. false\t" + rs.isBeforeFirst());
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29 // >> true: we're at the first result
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30 System.out.println("5. true\t" + rs.isFirst());
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31 // >> false: we're on the last row
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32 System.out.println("6. false\t" + rs.isAfterLast());
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33 // >> true: see above
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34 System.out.println("7. true\t" + rs.isLast());
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35 // >> false: there is one result, so this is it
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36 System.out.println("8. false\t" + rs.next());
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37 // >> true: yes, we're at the end
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38 System.out.println("9. true\t" + rs.isAfterLast());
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39 // >> false: no we're one over it
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40 System.out.println("10. false\t" + rs.isLast());
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41 // >> false: another try to move on should still fail
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42 System.out.println("11. false\t" + rs.next());
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43 // >> true: and we should stay positioned after the last
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44 System.out.println("12.true\t" + rs.isAfterLast());
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46 rs.close();
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47
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48 // try the same with a 'virtual' result set
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49 rs = dbmd.getTableTypes();
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50
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51 // >> true: we should be before the first result now
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52 System.out.println("1. true\t" + rs.isBeforeFirst());
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53 // >> false: we're not at the first result
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54 System.out.println("2. false\t" + rs.isFirst());
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55 // >> true: there is one result, so we can call next once
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56 System.out.println("3. true\t" + rs.next());
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57 // >> false: we're not before the first row anymore
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58 System.out.println("4. false\t" + rs.isBeforeFirst());
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59 // >> true: we're at the first result
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60 System.out.println("5. true\t" + rs.isFirst());
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61 // move to last row
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62 rs.last();
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63 // >> false: we're on the last row
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64 System.out.println("6. false\t" + rs.isAfterLast());
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65 // >> true: see above
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66 System.out.println("7. true\t" + rs.isLast());
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67 // >> false: there is one result, so this is it
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68 System.out.println("8. false\t" + rs.next());
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69 // >> true: yes, we're at the end
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70 System.out.println("9. true\t" + rs.isAfterLast());
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71 // >> false: no we're one over it
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72 System.out.println("10. false\t" + rs.isLast());
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73 // >> false: another try to move on should still fail
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74 System.out.println("11. false\t" + rs.next());
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75 // >> true: and we should stay positioned after the last
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76 System.out.println("12. true\t" + rs.isAfterLast());
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77
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78 rs.close();
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79
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80 con.close();
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81 }
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82 }