Program: 67574
Project: 67574
Buggy source:
/** 
 * Prepare the SQL statement for the call. First check if the statement is cached before building a new one.
 * @param unwrapConnection boolean flag set to true to unwrap the connection before preparing the statement in the case of a parameterized call.  
 */
public Statement prepareStatement(DatabaseCall call,AbstractSession session,boolean unwrapConnection) throws SQLException {
  Statement statement=null;
  if (call.usesBinding(session) && call.shouldCacheStatement(session)) {
    Map statementCache=getStatementCache();
synchronized (statementCache) {
      statement=(PreparedStatement)statementCache.get(call.getSQLString());
      if (statement != null) {
        statementCache.remove(call.getSQLString());
      }
    }
  }
  if (statement == null) {
    Connection nativeConnection=getConnection();
    if (unwrapConnection || call.isNativeConnectionRequired()) {
      nativeConnection=getPlatform().getConnection(session,nativeConnection);
    }
    if (call.isCallableStatementRequired()) {
      if (call.isResultSetScrollable()) {
        statement=nativeConnection.prepareCall(call.getSQLString(),call.getResultSetType(),call.getResultSetConcurrency());
        statement.setFetchSize(call.getResultSetFetchSize());
      }
 else {
        statement=nativeConnection.prepareCall(call.getSQLString());
      }
    }
 else     if (call.isResultSetScrollable()) {
      statement=nativeConnection.prepareStatement(call.getSQLString(),call.getResultSetType(),call.getResultSetConcurrency());
      statement.setFetchSize(call.getResultSetFetchSize());
    }
 else     if (call.isDynamicCall(session)) {
      statement=allocateDynamicStatement(nativeConnection);
    }
 else {
      statement=nativeConnection.prepareStatement(call.getSQLString());
    }
  }
  return statement;
}

Fixed version (ground truth):
/** 
 * Prepare the SQL statement for the call. First check if the statement is cached before building a new one.
 * @param unwrapConnection boolean flag set to true to unwrap the connection before preparing the statement in the case of a parameterized call.  
 */
public Statement prepareStatement(DatabaseCall call,AbstractSession session,boolean unwrapConnection) throws SQLException {
  Statement statement=null;
  if (call.usesBinding(session) && call.shouldCacheStatement(session)) {
    Map statementCache=getStatementCache();
synchronized (statementCache) {
      statement=(PreparedStatement)statementCache.get(call.getSQLString());
      if (statement != null) {
        statementCache.remove(call.getSQLString());
      }
    }
  }
  if (statement == null) {
    Connection nativeConnection=getConnection();
    if (nativeConnection == null) {
      throw DatabaseException.databaseAccessorConnectionIsNull(this);
    }
    if (unwrapConnection || call.isNativeConnectionRequired()) {
      nativeConnection=getPlatform().getConnection(session,nativeConnection);
    }
    if (call.isCallableStatementRequired()) {
      if (call.isResultSetScrollable()) {
        statement=nativeConnection.prepareCall(call.getSQLString(),call.getResultSetType(),call.getResultSetConcurrency());
        statement.setFetchSize(call.getResultSetFetchSize());
      }
 else {
        statement=nativeConnection.prepareCall(call.getSQLString());
      }
    }
 else     if (call.isResultSetScrollable()) {
      statement=nativeConnection.prepareStatement(call.getSQLString(),call.getResultSetType(),call.getResultSetConcurrency());
      statement.setFetchSize(call.getResultSetFetchSize());
    }
 else     if (call.isDynamicCall(session)) {
      statement=allocateDynamicStatement(nativeConnection);
    }
 else {
      statement=nativeConnection.prepareStatement(call.getSQLString());
    }
  }
  return statement;
}