removeColumn does not update the ref field of ctTable.  Excel reports a corrupted file when he file is opened, and repairs it by deleting the table.  Unit test code is presented below.  When bApplyBugFix is false, the table is corrupted.  When bApplyBugFix is true, the table is not corrupted.

- David Gauntt

    public static void doUnitTest(File file) {
        final XSSFWorkbook workbook = new XSSFWorkbook();
        final XSSFSheet sheet = workbook.createSheet();

        removeColumnUnitTest(sheet);

        try (OutputStream fileOut = new FileOutputStream(file)) {
            workbook.write(fileOut);
        } catch (Exception e) {
            System.err.println(e.getMessage());
        } finally {
            try {
                workbook.close();
            } catch (IOException e) {
                System.err.println(e.getMessage());
            }
        }
        System.out.println("doUnitTest: done");
        final Desktop desktop = Desktop.getDesktop();
        try {
            desktop.open(file);
        } catch (Exception e) {
            System.err.println(e.getMessage());
        }

    }

    private static void removeColumnUnitTest(XSSFSheet sheet) {
        final boolean bApplyBugFix = true;
        final String procName = "removeColumnUnitTest";
        final int NUMCOLS = 3, NUMROWS = 4;

        System.out.println(String.format("\r\n%s: bFixBug=%s", procName, bApplyBugFix));

        /* Fill a range with data */
        for (int i = 0; i < NUMROWS; i++) {
            XSSFRow row = sheet.createRow(i);
            for (int j = 0; j < NUMCOLS; j++) {
                XSSFCell localXSSFCell = row.createCell(j);
                if (i == 0) {
                    localXSSFCell.setCellValue(String.format("Col%d", j + 1));
                } else {
                    localXSSFCell.setCellValue(String.format("(%d,%d)", i + 1, j + 1));
                }
            }
        }

        /* Define a single column data range including headers */
        AreaReference my_data_range = new AreaReference(new CellReference(0, 0),
                new CellReference(NUMROWS - 1, NUMCOLS - 1), SpreadsheetVersion.EXCEL2007);

        /* Create an object of type XSSFTable */
        final XSSFTable my_table = sheet.createTable(my_data_range);
        my_table.setDisplayName(procName);

        /* Apply bug fix for creatTable/createColumn */
        final CTTable ctTable = my_table.getCTTable();
        final List<CTTableColumn> ctTableColumns = ctTable.getTableColumns().getTableColumnList();
        final long numCols = ctTableColumns.size();
        for (int n = 0; n < numCols; ++n) {
            ctTableColumns.get(n).setId(n + 1);
        }
        /* Remove the last column */
        my_table.removeColumn(NUMCOLS - 1);
        System.out.println(String.format("%s: after removing last column from table", procName));
        System.out.println(my_table.getCTTable().toString());

        if (bApplyBugFix) {
            my_data_range = new AreaReference(new CellReference(0, 0), new CellReference(NUMROWS - 1, NUMCOLS - 2),
                    SpreadsheetVersion.EXCEL2007);
            my_table.setArea(my_data_range);
            System.out.println("After applying bug fix");
            System.out.println(my_table.getCTTable().toString());
        }

    }