// jTDS JDBC Driver for Microsoft SQL Server and Sybase
// Copyright (C) 2004 The jTDS Project
//
// 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 net.sourceforge.jtds.test;

import java.math.BigDecimal;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import java.sql.Types;

/**
 * @version $Id: PreparedStatementTest.java,v 1.0, 2006-03-15 17:47:22Z, Robert Worsnop$
 */
public class PreparedStatementTest extends TestBase {

    public PreparedStatementTest(String name) {
        super(name);
    }

    public void testPreparedStatement() throws Exception {
        PreparedStatement pstmt = con.prepareStatement("SELECT * FROM #test");

        Statement stmt = con.createStatement();
        makeTestTables(stmt);
        makeObjects(stmt, 10);
        stmt.close();

        ResultSet rs = pstmt.executeQuery();
        dump(rs);

        rs.close();
        pstmt.close();
    }

    public void testScrollablePreparedStatement() throws Exception {
        Statement stmt = con.createStatement();
        makeTestTables(stmt);
        makeObjects(stmt, 10);
        stmt.close();

        PreparedStatement pstmt = con.prepareStatement("SELECT * FROM #test",
                                                       ResultSet.TYPE_SCROLL_SENSITIVE,
                                                       ResultSet.CONCUR_READ_ONLY);

        ResultSet rs = pstmt.executeQuery();

        assertTrue(rs.isBeforeFirst());

        while (rs.next()) {
        }

        assertTrue(rs.isAfterLast());

        //This currently fails because the PreparedStatement
        //Doesn't know it needs to create a cursored ResultSet.
        //Needs some refactoring!!
        // SAfe Not any longer. ;o)
        while (rs.previous()) {
        }

        assertTrue(rs.isBeforeFirst());

        rs.close();
        pstmt.close();
    }

    public void testPreparedStatementAddBatch1()
    throws Exception {
        int count = 50;

        Statement stmt = con.createStatement();
        stmt.execute("CREATE TABLE #psbatch1 (f_int INT)");

        int sum = 0;

        con.setAutoCommit(false);
        PreparedStatement pstmt = con.prepareStatement("INSERT INTO #psbatch1 (f_int) VALUES (?)");

        for (int i = 0; i < count; i++) {
            pstmt.setInt(1, i);
            pstmt.addBatch();
            sum += i;
        }

        int[] results = pstmt.executeBatch();

        assertEquals(results.length, count);

        for (int i = 0; i < count; i++) {
            assertEquals(results[i], 1);
        }

        pstmt.close();

        con.commit();
        con.setAutoCommit(true);

        ResultSet rs = stmt.executeQuery("SELECT SUM(f_int) FROM #psbatch1");

        assertTrue(rs.next());
        System.out.println(rs.getInt(1));
        assertEquals(rs.getInt(1), sum);
        rs.close();
        stmt.close();
    }

    /**
     * Test for [924030] EscapeProcesser problem with "{}" brackets
     */
    public void testPreparedStatementParsing1() throws Exception {
        String data = "New {order} plus {1} more";
        Statement stmt = con.createStatement();

        stmt.execute("CREATE TABLE #psp1 (data VARCHAR(32))");
        stmt.close();

        stmt = con.createStatement();
        stmt.execute("create procedure #sp_psp1 @data VARCHAR(32) as INSERT INTO #psp1 (data) VALUES(@data)");
        stmt.close();

        PreparedStatement pstmt = con.prepareStatement("{call #sp_psp1('" + data + "')}");

        pstmt.execute();
        pstmt.close();

        stmt = con.createStatement();
        ResultSet rs = stmt.executeQuery("SELECT data FROM #psp1");

        assertTrue(rs.next());

        assertTrue(data.equals(rs.getString(1)));

        assertFalse(rs.next());
        rs.close();
        stmt.close();
    }

    /**
     * Test for bug [1008882] Some queries with parameters cannot be executed with 0.9-rc1
     */
    public void testPreparedStatementParsing2() throws Exception {
        PreparedStatement pstmt = con.prepareStatement(" SELECT ?");

        pstmt.setString(1, "TEST");

        ResultSet rs = pstmt.executeQuery();

        assertTrue(rs.next());
        assertEquals("TEST", rs.getString(1));
        assertFalse(rs.next());

        pstmt.close();
        rs.close();
    }

    /**
     * Test for "invalid parameter index" error.
     */
    public void testPreparedStatementParsing3() throws Exception {
        PreparedStatement pstmt = con.prepareStatement(
                "UPDATE dbo.DEPARTMENTS SET DEPARTMENT_NAME=? WHERE DEPARTMENT_ID=?");

        pstmt.setString(1, "TEST");
        pstmt.setString(2, "TEST");

        pstmt.close();
    }

    /**
     * Test for [931090] ArrayIndexOutOfBoundsException in rollback()
     */
    public void testPreparedStatementRollback1() throws Exception {
        Connection localCon = getConnection();
        Statement stmt = localCon.createStatement();

        stmt.execute("CREATE TABLE #psr1 (data BIT)");

        localCon.setAutoCommit(false);
        PreparedStatement pstmt = localCon.prepareStatement("INSERT INTO #psr1 (data) VALUES (?)");

        pstmt.setBoolean(1, true);
        assertEquals(1, pstmt.executeUpdate());
        pstmt.close();

        localCon.rollback();

        ResultSet rs = stmt.executeQuery("SELECT data FROM #psr1");
        assertFalse(rs.next());
        rs.close();
        stmt.close();

        localCon.close();

        try {
            localCon.commit();
            fail("Expecting commit to fail, connection was closed");
        } catch (SQLException ex) {
            assertEquals("HY010", ex.getSQLState());
        }

        try {
            localCon.rollback();
            fail("Expecting rollback to fail, connection was closed");
        } catch (SQLException ex) {
            assertEquals("HY010", ex.getSQLState());
        }
    }

    /**
     * Test for bug [938494] setObject(i, o, NUMERIC/DECIMAL) cuts off decimal places
     */
    public void testPreparedStatementSetObject1() throws Exception {
        BigDecimal data = new BigDecimal(3.7D);

        Statement stmt = con.createStatement();
        stmt.execute("CREATE TABLE #psso1 (data MONEY)");

        PreparedStatement pstmt = con.prepareStatement("INSERT INTO #psso1 (data) VALUES (?)");

        pstmt.setObject(1, data);
        assertEquals(1, pstmt.executeUpdate());
        pstmt.close();

        ResultSet rs = stmt.executeQuery("SELECT data FROM #psso1");

        assertTrue(rs.next());
        assertEquals(data.doubleValue(), rs.getDouble(1), 0);
        assertFalse(rs.next());
        rs.close();
        stmt.close();
    }

    /**
     * Test for bug [938494] setObject(i, o, NUMERIC/DECIMAL) cuts off decimal places
     */
    public void testPreparedStatementSetObject2() throws Exception {
        BigDecimal data = new BigDecimal(3.7D);

        Statement stmt = con.createStatement();
        stmt.execute("CREATE TABLE #psso2 (data MONEY)");

        PreparedStatement pstmt = con.prepareStatement("INSERT INTO #psso2 (data) VALUES (?)");

        pstmt.setObject(1, data, Types.NUMERIC);
        assertEquals(1, pstmt.executeUpdate());
        pstmt.close();

        ResultSet rs = stmt.executeQuery("SELECT data FROM #psso2");

        assertTrue(rs.next());
        assertEquals(data.doubleValue(), rs.getDouble(1), 0);
        assertFalse(rs.next());
        rs.close();
        stmt.close();
    }

    /**
     * Test for bug [938494] setObject(i, o, NUMERIC/DECIMAL) cuts off decimal places
     */
    public void testPreparedStatementSetObject3() throws Exception {
        BigDecimal data = new BigDecimal(3.7D);

        Statement stmt = con.createStatement();
        stmt.execute("CREATE TABLE #psso3 (data MONEY)");

        PreparedStatement pstmt = con.prepareStatement("INSERT INTO #psso3 (data) VALUES (?)");

        pstmt.setObject(1, data, Types.DECIMAL);
        assertEquals(1, pstmt.executeUpdate());
        pstmt.close();

        ResultSet rs = stmt.executeQuery("SELECT data FROM #psso3");

        assertTrue(rs.next());
        assertEquals(data.doubleValue(), rs.getDouble(1), 0);
        assertFalse(rs.next());
        rs.close();
        stmt.close();
    }

    /**
     * Test for bug [938494] setObject(i, o, NUMERIC/DECIMAL) cuts off decimal places
     */
    public void testPreparedStatementSetObject4() throws Exception {
        BigDecimal data = new BigDecimal(3.7D);

        Statement stmt = con.createStatement();
        stmt.execute("CREATE TABLE #psso4 (data MONEY)");

        PreparedStatement pstmt = con.prepareStatement("INSERT INTO #psso4 (data) VALUES (?)");

        pstmt.setObject(1, data, Types.NUMERIC, 4);
        assertEquals(1, pstmt.executeUpdate());
        pstmt.close();

        ResultSet rs = stmt.executeQuery("SELECT data FROM #psso4");

        assertTrue(rs.next());
        assertEquals(data.doubleValue(), rs.getDouble(1), 0);
        assertFalse(rs.next());
        rs.close();
        stmt.close();
    }

    /**
     * Test for bug [938494] setObject(i, o, NUMERIC/DECIMAL) cuts off decimal places
     */
    public void testPreparedStatementSetObject5() throws Exception {
        BigDecimal data = new BigDecimal(3.7D);

        Statement stmt = con.createStatement();
        stmt.execute("CREATE TABLE #psso5 (data MONEY)");

        PreparedStatement pstmt = con.prepareStatement("INSERT INTO #psso5 (data) VALUES (?)");

        pstmt.setObject(1, data, Types.DECIMAL, 4);
        assertEquals(1, pstmt.executeUpdate());
        pstmt.close();

        ResultSet rs = stmt.executeQuery("SELECT data FROM #psso5");

        assertTrue(rs.next());
        assertEquals(data.doubleValue(), rs.getDouble(1), 0);
        assertFalse(rs.next());
        rs.close();
        stmt.close();
    }

    /**
     * Test for bug [1204658] Conversion from Number to BigDecimal causes data
     * corruption.
     */
    public void testPreparedStatementSetObject6() throws Exception {
        final Long TEST_VALUE = new Long(2265157674817400199L);

        Statement s = con.createStatement();
        s.execute("CREATE TABLE #psso6 (test_value NUMERIC(22,0))");

        PreparedStatement ps = con.prepareStatement(
                "insert into #psso6(test_value) values (?)");
        ps.setObject(1, TEST_VALUE, Types.DECIMAL);
        assertEquals(1, ps.executeUpdate());
        ps.close();

        ResultSet rs = s.executeQuery("select test_value from #psso6");
        assertTrue(rs.next());
        assertEquals("Persisted value not equal to original value",
                TEST_VALUE.longValue(), rs.getLong(1));
        assertFalse(rs.next());
        rs.close();

        s.close();
    }

    /**
     * Test for bug [985754] row count is always 0
     */
    public void testUpdateCount1() throws Exception {
    	int count = 50;

        Statement stmt = con.createStatement();
        stmt.execute("CREATE TABLE #updateCount1 (data INT)");

        PreparedStatement pstmt = con.prepareStatement("INSERT INTO #updateCount1 (data) VALUES (?)");

        for (int i = 1; i <= count; i++) {
            pstmt.setInt(1, i);
            assertEquals(1, pstmt.executeUpdate());
        }

        pstmt.close();

        ResultSet rs = stmt.executeQuery("SELECT COUNT(*) FROM #updateCount1");

        assertTrue(rs.next());
        assertEquals(count, rs.getInt(1));
        assertFalse(rs.next());

        stmt.close();
        rs.close();

        pstmt = con.prepareStatement("DELETE FROM #updateCount1");
        assertEquals(count, pstmt.executeUpdate());
        pstmt.close();

    }

    /**
     * Test for parameter markers in function escapes.
     */
    public void testEscapedParams() throws Exception {
        PreparedStatement pstmt = con.prepareStatement("SELECT {fn left(?, 2)}");

        pstmt.setString(1, "TEST");

        ResultSet rs = pstmt.executeQuery();

        assertTrue(rs.next());
        assertEquals("TE", rs.getString(1));
        assertFalse(rs.next());

        rs.close();
        pstmt.close();
    }

    /**
     * Test for bug [ 1059916 ] whitespace needed in preparedStatement.
     */
    public void testMissingWhitespace() throws Exception
    {
        PreparedStatement pstmt = con.prepareStatement(
            "SELECT name from master..syscharsets where description like?and?between csid and 10");
        pstmt.setString(1, "ISO%");
        pstmt.setInt(2, 0);
        ResultSet rs = pstmt.executeQuery();
        assertNotNull(rs);
        assertTrue(rs.next());
    }

    /**
     * Test for bug [1022968] Long SQL expression error.
     * NB. Test must be run with TDS=7.0 to fail.
     */
    public void testLongStatement() throws Exception {
        Statement stmt = con.createStatement(
                ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_UPDATABLE);

        stmt.execute("CREATE TABLE #longStatement (id int primary key, data varchar(8000))");

        StringBuffer buf = new StringBuffer(4096);
        buf.append("SELECT * FROM #longStatement WHERE data = '");

        for (int i = 0; i < 4000; i++) {
            buf.append('X');
        }

        buf.append("'");

        ResultSet rs = stmt.executeQuery(buf.toString());

        assertNotNull(rs);
        assertFalse(rs.next());

        rs.close();
        stmt.close();
    }

    /**
     * Test for bug [1047330] prep statement with more than 2100 params fails.
     */
    public void testManyParametersStatement() throws Exception {
        final int PARAMS = 2110;

        Statement stmt = con.createStatement();
        makeTestTables(stmt);
        makeObjects(stmt, 10);
        stmt.close();

        StringBuffer sb = new StringBuffer(PARAMS * 3 + 100);
        sb.append("SELECT * FROM #test WHERE f_int in (?");
        for (int i = 1; i < PARAMS; i++) {
            sb.append(", ?");
        }
        sb.append(")");

        try {
            // This can work if prepareSql=0
            PreparedStatement pstmt = con.prepareStatement(sb.toString());

            // Set the parameters
            for (int i = 1; i <= PARAMS; i++) {
                pstmt.setInt(i, i);
            }

            // Execute query and count rows
            ResultSet rs = pstmt.executeQuery();
            int cnt = 0;
            while (rs.next()) {
                ++cnt;
            }

            // Make sure this worked
            assertEquals(9, cnt);
        } catch (SQLException ex) {
            assertEquals("22025", ex.getSQLState());
        }
    }

    /**
     * Test for bug [1010660] 0.9-rc1 setMaxRows causes unlimited temp stored
     * procedures. This test has to be run with logging enabled or while
     * monitoring it with SQL Profiler to see whether the temporary stored
     * procedure is executed or the SQL is executed directly.
     */
    public void testMaxRows() throws SQLException {
        Statement stmt = con.createStatement();
        stmt.execute("CREATE TABLE #maxRows (val int)"
                + " INSERT INTO #maxRows VALUES (1)"
                + " INSERT INTO #maxRows VALUES (2)");

        PreparedStatement pstmt = con.prepareStatement(
                "SELECT * FROM #maxRows WHERE val<? ORDER BY val");
        pstmt.setInt(1, 100);
        pstmt.setMaxRows(1);

        ResultSet rs = pstmt.executeQuery();

        assertNotNull(rs);
        assertTrue(rs.next());
        assertEquals(1, rs.getInt(1));
        assertFalse(rs.next());

        rs.close();
        pstmt.close();

        stmt.executeUpdate("DROP TABLE #maxRows");
        stmt.close();
    }

    /**
     * Test for bug [1050660] PreparedStatement.getMetaData() clears resultset.
     */
    public void testMetaDataClearsResultSet() throws Exception {
        Statement stmt = con.createStatement(
                ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_UPDATABLE);

        stmt.executeUpdate(
                "CREATE TABLE #metaDataClearsResultSet (id int primary key, data varchar(8000))");
        stmt.executeUpdate("INSERT INTO #metaDataClearsResultSet (id, data)"
                + " VALUES (1, '1')");
        stmt.executeUpdate("INSERT INTO #metaDataClearsResultSet (id, data)"
                + " VALUES (2, '2')");
        stmt.close();

        PreparedStatement pstmt = con.prepareStatement(
                "SELECT * FROM #metaDataClearsResultSet ORDER BY id");
        ResultSet rs = pstmt.executeQuery();

        assertNotNull(rs);

        ResultSetMetaData rsmd = pstmt.getMetaData();
        assertEquals(2, rsmd.getColumnCount());
        assertEquals("id", rsmd.getColumnName(1));
        assertEquals("data", rsmd.getColumnName(2));
        assertEquals(8000, rsmd.getColumnDisplaySize(2));

        assertTrue(rs.next());
        assertEquals(1, rs.getInt(1));
        assertEquals("1", rs.getString(2));

        assertTrue(rs.next());
        assertEquals(2, rs.getInt(1));
        assertEquals("2", rs.getString(2));

        assertFalse(rs.next());

        rs.close();
        pstmt.close();
    }

    /**
     * Test for bad truncation in prepared statements on metadata retrieval
     * (patch [1076383] ResultSetMetaData for more complex statements for SQL
     * Server).
     */
    public void testMetaData() throws Exception {
        Statement stmt = con.createStatement(
                ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_UPDATABLE);

        stmt.executeUpdate("CREATE TABLE #metaData (id int, data varchar(8000))");
        stmt.executeUpdate("INSERT INTO #metaData (id, data)"
                + " VALUES (1, 'Data1')");
        stmt.executeUpdate("INSERT INTO #metaData (id, data)"
                + " VALUES (1, 'Data2')");
        stmt.executeUpdate("INSERT INTO #metaData (id, data)"
                + " VALUES (2, 'Data3')");
        stmt.executeUpdate("INSERT INTO #metaData (id, data)"
                + " VALUES (2, 'Data4')");
        stmt.close();

        // test simple statement
        PreparedStatement pstmt = con.prepareStatement("SELECT id " +
                "FROM #metaData " +
                "WHERE data=? GROUP BY id");

        ResultSetMetaData rsmd = pstmt.getMetaData();

        assertNotNull("No meta data returned for simple statement", rsmd);

        assertEquals(1, rsmd.getColumnCount());
        assertEquals("id", rsmd.getColumnName(1));

        pstmt.close();

        // test more complex statement
        pstmt = con.prepareStatement("SELECT id, count(*) as count " +
                "FROM #metaData " +
                "WHERE data=? GROUP BY id");

        rsmd = pstmt.getMetaData();

        assertNotNull("No metadata returned for complex statement", rsmd);

        assertEquals(2, rsmd.getColumnCount());
        assertEquals("id", rsmd.getColumnName(1));
        assertEquals("count", rsmd.getColumnName(2));

        pstmt.close();
    }

    /**
     * Test for bug [1071397] Error in prepared statement (parameters in outer
     * join escapes are not recognized).
     */
    public void testOuterJoinParameters() throws SQLException {
        Statement stmt = con.createStatement();
        stmt.executeUpdate(
                "CREATE TABLE #outerJoinParameters (id int primary key)");
        stmt.executeUpdate(
                "INSERT #outerJoinParameters (id) values (1)");
        stmt.close();

        // Real dumb join, the idea is to see the parser works fine
        PreparedStatement pstmt = con.prepareStatement(
                "select * from "
                + "{oj #outerJoinParameters a left outer join #outerJoinParameters b on a.id = ?}"
                + "where b.id = ?");
        pstmt.setInt(1, 1);
        pstmt.setInt(2, 1);
        ResultSet rs = pstmt.executeQuery();
        assertTrue(rs.next());
        assertEquals(1, rs.getInt(1));
        assertEquals(1, rs.getInt(2));
        assertFalse(rs.next());
        rs.close();
        pstmt.close();

        pstmt = con.prepareStatement("select {fn round(?, 0)}");
        pstmt.setDouble(1, 1.2);
        rs = pstmt.executeQuery();
        assertTrue(rs.next());
        assertEquals(1, rs.getDouble(1), 0);
        assertFalse(rs.next());
        rs.close();
        pstmt.close();
    }

    /**
     * Inner class used by {@link PreparedStatementTest#testMultiThread} to
     * test concurrency.
     */
    static class TestMultiThread extends Thread {
        static Connection con;
        static final int THREAD_MAX = 10;
        static final int LOOP_MAX = 10;
        static final int ROWS_MAX = 10;
        static int live;
        static Exception error;

        int threadId;

        TestMultiThread(int n) {
            threadId = n;
        }

        public void run() {
            try {
                con.rollback();
                PreparedStatement pstmt = con.prepareStatement(
                        "SELECT id, data FROM #TEST WHERE id = ?",
                        ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);

                for (int i = 1; i <= LOOP_MAX; i++) {
                    pstmt.clearParameters();
                    pstmt.setInt(1, i);
                    ResultSet rs = pstmt.executeQuery();

                    while (rs.next()) {
                        rs.getInt(1);
                        rs.getString(2);
                    }

                }

                pstmt.close();
            } catch (Exception e) {
                System.err.print("ID=" + threadId + ' ');
                e.printStackTrace();
                error = e;
            }

            synchronized (this.getClass()) {
                live--;
            }
        }

        static void startThreads(Connection con) throws Exception {
            TestMultiThread.con = con;
            con.setAutoCommit(false);

            Statement stmt = con.createStatement();
            stmt.execute("CREATE TABLE #TEST (id int identity primary key, data varchar(255))");

            for (int i = 0; i < ROWS_MAX; i++) {
                stmt.executeUpdate("INSERT INTO #TEST (data) VALUES('This is line " + i + "')");
            }

            stmt.close();
            con.commit();

            live = THREAD_MAX;
            for (int i = 0; i < THREAD_MAX; i++) {
                new TestMultiThread(i).start();
            }
            while (live > 0) {
                sleep(1);
            }

            if (error != null) {
                throw error;
            }
        }
    }

    /**
     * Test <code>Connection</code> concurrency by running
     * <code>PreparedStatement</code>s and rollbacks at the same time to see
     * whether handles are not lost in the process.
     */
    public void testMultiThread() throws Exception {
        TestMultiThread.startThreads(con);
    }

    /**
     * Test for bug [1094621] Decimal conversion error:  A prepared statement
     * with a decimal parameter that is -1E38 will fail as a result of the
     * driver generating a parameter specification of decimal(38,10) rather
     * than decimal(38,0).
     */
    public void testBigDecBadParamSpec() throws Exception
    {
        Statement stmt = con.createStatement();
        stmt.execute(
                "create table #test (id int primary key, val decimal(38,0))");
        BigDecimal bd =
                new BigDecimal("99999999999999999999999999999999999999");
        PreparedStatement pstmt =
                con.prepareStatement("insert into #test values(?,?)");
        pstmt.setInt(1, 1);
        pstmt.setBigDecimal(2, bd);
        assertEquals(1, pstmt.executeUpdate()); // Worked OK
        pstmt.setInt(1, 2);
        pstmt.setBigDecimal(2, bd.negate());
        assertEquals(1, pstmt.executeUpdate()); // Failed
    }

    /**
     * Test for bug [1111516 ] Illegal Parameters in PreparedStatement.
     */
    public void testIllegalParameters() throws Exception
    {
        Statement stmt = con.createStatement();
        stmt.execute("create table #test (id int)");
        PreparedStatement pstmt =
                con.prepareStatement("select top ? * from #test");
        pstmt.setInt(1, 10);
        try {
            pstmt.executeQuery();
            // This won't fail in unprepared mode (prepareSQL == 0)
            // fail("Expecting an exception to be thrown.");
        } catch (SQLException ex) {
            assertEquals("37000", ex.getSQLState());
        }
        pstmt.close();
    }

    /**
     * Test for bug [1180777] collation-related execption on update.
     * <p/>
     * If a statement prepare fails the statement should still be executed
     * (unprepared) and a warning should be added to the connection (the
     * prepare failed, this is a connection event even if it happened on
     * statement execute).
     */
    public void testPrepareFailWarning() throws SQLException {
        try {
            PreparedStatement pstmt = con.prepareStatement(
                    "CREATE VIEW prepFailWarning AS SELECT 1 AS value");
            pstmt.execute();
            // Check that a warning was generated on the connection.
            // Although not totally correct (the warning should be generated on
            // the statement) the warning is generated while preparing the
            // statement, so it belongs to the connection.
            assertNotNull(con.getWarnings());
            pstmt.close();

            Statement stmt = con.createStatement();
            ResultSet rs = stmt.executeQuery("SELECT * FROM prepFailWarning");
            assertTrue(rs.next());
            assertEquals(1, rs.getInt(1));
            assertFalse(rs.next());
            rs.close();
            stmt.close();
        } finally {
            Statement stmt = con.createStatement();
            stmt.execute("DROP VIEW prepFailWarning");
            stmt.close();
        }
    }

    /**
     * Test that preparedstatement logic copes with commit modes and
     * database changes.
     */
    public void testPrepareModes() throws Exception {
        //
        // To see in detail what is happening enable logging and study the prepare
        // statements that are being executed.
        // For example if maxStatements=0 then the log should show that each
        // statement is prepared and then unprepared at statement close.
        // If maxStatements < 4 then you will see statements being unprepared
        // when the cache is full.
        //
//        DriverManager.setLogStream(System.out);
        Statement stmt = con.createStatement();
        stmt.execute("CREATE TABLE #TEST (id int primary key, data varchar(255))");
        //
        // Statement prepared with auto commit = true
        //
        PreparedStatement pstmt1 = con.prepareStatement("INSERT INTO #TEST (id, data) VALUES (?,?)");
        pstmt1.setInt(1, 1);
        pstmt1.setString(2, "Line one");
        assertEquals(1, pstmt1.executeUpdate());
        //
        // Move to manual commit mode
        //
        con.setAutoCommit(false);
        //
        // Ensure a new transaction is started
        //
        ResultSet rs = stmt.executeQuery("SELECT * FROM #TEST");
        assertNotNull(rs);
        rs.close();
        //
        // With Sybase this execution should cause a new proc to be created
        // as we are now in chained mode
        //
        pstmt1.setInt(1, 2);
        pstmt1.setString(2, "Line two");
        assertEquals(1, pstmt1.executeUpdate());
        //
        // Statement prepared with auto commit = false
        //
        PreparedStatement pstmt2 = con.prepareStatement("SELECT * FROM #TEST WHERE id = ?");
        pstmt2.setInt(1, 2);
        rs = pstmt2.executeQuery();
        assertNotNull(rs);
        assertTrue(rs.next());
        assertEquals("Line two", rs.getString("data"));
        //
        // Change catalog
        //
        String oldCat = con.getCatalog();
        con.setCatalog("master");
        //
        // Executiion from another database should cause SQL Server to create
        // a new handle or store proc
        //
        pstmt2.setInt(1, 1);
        rs = pstmt2.executeQuery();
        assertNotNull(rs);
        assertTrue(rs.next());
        assertEquals("Line one", rs.getString("data"));
        //
        // Now change back to original database
        //
        con.setCatalog(oldCat);
        //
        // Roll back transaction which should cause SQL Server procs (but not
        // handles to be lost) causing statement to be prepared again.
        //
        pstmt2.setInt(1, 1);
        rs = pstmt2.executeQuery();
        assertNotNull(rs);
        assertTrue(rs.next());
        assertEquals("Line one", rs.getString("data"));
        //
        // Now return to auto commit mode
        //
        con.setAutoCommit(true);
        //
        // With Sybase statement will be prepared again as now in chained off mode
        //
        pstmt2.setInt(1, 1);
        rs = pstmt2.executeQuery();
        assertNotNull(rs);
        assertTrue(rs.next());
        assertEquals("Line one", rs.getString("data"));
        pstmt2.close();
        pstmt1.close();
        stmt.close();
        //
        // Now we create a final prepared statement to demonstate that
        // the cache is flushed correctly when the number of statements
        // exceeds the cachesize. For example setting maxStatements=1
        // will cause three statements to be unprepared when this statement
        // is closed
        //
        pstmt1 = con.prepareStatement("SELECT id, data FROM #TEST");
        pstmt1.executeQuery();
        pstmt1.close();
    }

    /**
     * Test that statements which cannot be prepared are remembered.
     */
    public void testNoPrepare() throws Exception {
        //       DriverManager.setLogStream(System.out);
        Statement stmt = con.createStatement();
        stmt.execute("CREATE TABLE #TEST (id int primary key, data text)");
        //
        // Statement cannot be prepared on Sybase due to text field
        //
        PreparedStatement pstmt1 = con.prepareStatement("INSERT INTO #TEST (id, data) VALUES (?,?)");
        pstmt1.setInt(1, 1);
        pstmt1.setString(2, "Line one");
        assertEquals(1, pstmt1.executeUpdate());
        //
        // This time should not try and prepare
        //
        pstmt1.setInt(1, 2);
        pstmt1.setString(2, "Line two");
        assertEquals(1, pstmt1.executeUpdate());
        pstmt1.close();
    }

    /**
     * Tests that float (single precision - 32 bit) values are not converted to
     * double (thus loosing precision).
     */
    public void testFloatValues() throws Exception {
        Statement stmt = con.createStatement();
        stmt.executeUpdate("create table #floatTest (v real)");
        stmt.executeUpdate("insert into #floatTest (v) values (2.3)");
        stmt.close();

        PreparedStatement pstmt = con.prepareStatement(
                "select * from #floatTest where v = ?");
        pstmt.setFloat(1, 2.3f);
        ResultSet rs = pstmt.executeQuery();
        assertTrue(rs.next());
        assertEquals(2.3f, rs.getFloat(1), 0);
        assertTrue(rs.getObject(1) instanceof Float);
        assertEquals(2.3f, ((Float) rs.getObject(1)).floatValue(), 0);

        // Just make sure that conversion to double will break this
        assertFalse(2.3 - rs.getDouble(1) == 0);
        assertFalse(rs.next());
        rs.close();
        pstmt.close();
    }

    public void testNegativeScale() throws Exception {
        Statement stmt = con.createStatement();
        stmt.execute("CREATE TABLE #testNegativeScale (val decimal(28,10))");
        PreparedStatement pstmt = con.prepareStatement(
                "INSERT INTO #testNegativeScale VALUES(?)");
        pstmt.setBigDecimal(1, new BigDecimal("2.9E7"));
        assertEquals(1, pstmt.executeUpdate());
        pstmt.close();

        ResultSet rs = stmt.executeQuery("SELECT * FROM #testNegativeScale");
        assertNotNull(rs);
        assertTrue(rs.next());
        assertEquals(29000000, rs.getBigDecimal(1).intValue());
        stmt.close();
    }

    public static void main(String[] args) {
        junit.textui.TestRunner.run(PreparedStatementTest.class);
    }
}
