Program: 91707
Project: 91707
Buggy source:
/** 
 * Executes the given SQL statement. This method performs the following choices: <ul> <li>If   {@link #isSupported(StringBuilder)} returns {@code false}, then this method does nothing.</li> <li>If the   {@code maxRowsPerInsert} argument given at construction time was zero,then this method skips  {@code "INSERT INTO"} statements but executes all other.</li><li>Otherwise this method executes the given statement with the following modification: if the statement is an  {@code "INSERT INTO"} with many values, then this method may breakthat statement into many  {@code "INSERT INTO"} where each statements does not have movethan  {@code maxRowsPerInsert} rows.</li></ul> Subclasses that override this method can freely edit the  {@link StringBuilder} content beforeto invoke this method.
 * @param sql  the SQL statement to execute.
 * @return the number of rows added or modified as a result of the statement execution.
 * @throws SQLException if an error occurred while executing the SQL statement.
 * @throws IOException if an I/O operation was required and failed.
 */
protected int execute(final StringBuilder sql) throws SQLException, IOException {
  if (!isSupported(sql)) {
    return 0;
  }
  String subSQL=currentSQL=CharSequences.trimWhitespaces(sql).toString();
  int count=0;
  if (subSQL.startsWith("String_Node_Str")) {
    statement.executeQuery(subSQL).close();
  }
 else {
    if (maxRowsPerInsert != Integer.MAX_VALUE && subSQL.startsWith("String_Node_Str")) {
      if (maxRowsPerInsert == 0) {
        subSQL=null;
      }
 else {
        int endOfLine=subSQL.indexOf('\n',11);
        if (subSQL.regionMatches(endOfLine - 6,"String_Node_Str",0,6)) {
          sql.setLength(0);
          final int startOfValues=sql.append(subSQL,0,endOfLine).append(' ').length();
          int nrows=maxRowsPerInsert;
          int begin=endOfLine + 1;
          while ((endOfLine=subSQL.indexOf('\n',++endOfLine)) >= 0) {
            if (--nrows == 0) {
              int end=endOfLine;
              if (subSQL.charAt(end - 1) == ',') {
                end--;
              }
              count+=statement.executeUpdate(currentSQL=sql.append(subSQL,begin,end).toString());
              sql.setLength(startOfValues);
              nrows=maxRowsPerInsert;
              begin=endOfLine + 1;
            }
          }
          int end=CharSequences.skipTrailingWhitespaces(subSQL,begin,subSQL.length());
          currentSQL=subSQL=(end > begin) ? sql.append(subSQL,begin,end).toString() : null;
        }
      }
    }
    if (subSQL != null) {
      count+=statement.executeUpdate(subSQL);
    }
  }
  currentSQL=null;
  return count;
}

Fixed version (ground truth):
/** 
 * Executes the given SQL statement. This method performs the following choices: <ul> <li>If   {@link #isSupported(CharSequence)} returns {@code false}, then this method does nothing.</li> <li>If the   {@code maxRowsPerInsert} argument given at construction time was zero,then this method skips  {@code "INSERT INTO"} statements but executes all other.</li><li>Otherwise this method executes the given statement with the following modification: if the statement is an  {@code "INSERT INTO"} with many values, then this method may breakthat statement into many  {@code "INSERT INTO"} where each statements does not have movethan  {@code maxRowsPerInsert} rows.</li></ul> Subclasses that override this method can freely edit the  {@link StringBuilder} content beforeto invoke this method.
 * @param sql  the SQL statement to execute.
 * @return the number of rows added or modified as a result of the statement execution.
 * @throws SQLException if an error occurred while executing the SQL statement.
 * @throws IOException if an I/O operation was required and failed.
 */
protected int execute(final StringBuilder sql) throws SQLException, IOException {
  if (!isSupported(sql)) {
    return 0;
  }
  String subSQL=currentSQL=CharSequences.trimWhitespaces(sql).toString();
  int count=0;
  if (subSQL.startsWith("String_Node_Str")) {
    statement.executeQuery(subSQL).close();
  }
 else {
    if (maxRowsPerInsert != Integer.MAX_VALUE && subSQL.startsWith("String_Node_Str")) {
      if (maxRowsPerInsert == 0) {
        subSQL=null;
      }
 else {
        int endOfLine=subSQL.indexOf('\n',11);
        if (subSQL.regionMatches(endOfLine - 6,"String_Node_Str",0,6)) {
          sql.setLength(0);
          final int startOfValues=sql.append(subSQL,0,endOfLine).append(' ').length();
          int nrows=maxRowsPerInsert;
          int begin=endOfLine + 1;
          while ((endOfLine=subSQL.indexOf('\n',++endOfLine)) >= 0) {
            if (--nrows == 0) {
              int end=endOfLine;
              if (subSQL.charAt(end - 1) == ',') {
                end--;
              }
              count+=statement.executeUpdate(currentSQL=sql.append(subSQL,begin,end).toString());
              sql.setLength(startOfValues);
              nrows=maxRowsPerInsert;
              begin=endOfLine + 1;
            }
          }
          int end=CharSequences.skipTrailingWhitespaces(subSQL,begin,subSQL.length());
          currentSQL=subSQL=(end > begin) ? sql.append(subSQL,begin,end).toString() : null;
        }
      }
    }
    if (subSQL != null) {
      count+=statement.executeUpdate(subSQL);
    }
  }
  currentSQL=null;
  return count;
}