Added Column Formula

Option to add column formula that applied automatically
for any new rows added to the table range

samples/Table/03_Column_Formula.php

@@ -0,0 +1,72 @@
+<?php
+
+use PhpOffice\PhpSpreadsheet\IOFactory;
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PhpOffice\PhpSpreadsheet\Worksheet\Table;
+
+require __DIR__ . '/../Header.php';
+
+// Create new Spreadsheet object
+$helper->log('Create new Spreadsheet object');
+$spreadsheet = new Spreadsheet();
+
+// Set document properties
+$helper->log('Set document properties');
+$spreadsheet->getProperties()->setCreator('aswinkumar863')
+    ->setLastModifiedBy('aswinkumar863')
+    ->setTitle('PhpSpreadsheet Table Test Document')
+    ->setSubject('PhpSpreadsheet Table Test Document')
+    ->setDescription('Test document for PhpSpreadsheet, generated using PHP classes.')
+    ->setKeywords('office PhpSpreadsheet php')
+    ->setCategory('Table');
+
+// Create the worksheet
+$helper->log('Add data');
+
+$spreadsheet->setActiveSheetIndex(0);
+
+$columnFormula = '=SUM(Sales_Data[[#This Row],[Q1]:[Q4]])';
+
+$dataArray = [
+    ['Year', 'Country', 'Q1', 'Q2', 'Q3', 'Q4', 'Sales'],
+    [2010, 'Belgium', 380, 390, 420, 460, $columnFormula],
+    [2010, 'France', 510, 490, 460, 590, $columnFormula],
+    [2010, 'Germany', 720, 680, 640, 660, $columnFormula],
+    [2010, 'Italy', 440, 410, 420, 450, $columnFormula],
+    [2010, 'Spain', 510, 490, 470, 420, $columnFormula],
+    [2010, 'UK', 690, 610, 620, 600, $columnFormula],
+    [2010, 'United States', 790, 730, 860, 850, $columnFormula],
+    [2011, 'Belgium', 400, 350, 450, 500, $columnFormula],
+    [2011, 'France', 620, 650, 415, 570, $columnFormula],
+    [2011, 'Germany', 680, 620, 710, 690, $columnFormula],
+    [2011, 'Italy', 430, 370, 350, 335, $columnFormula],
+    [2011, 'Spain', 460, 390, 430, 415, $columnFormula],
+    [2011, 'UK', 720, 650, 580, 510, $columnFormula],
+    [2011, 'United States', 800, 700, 900, 950, $columnFormula],
+];
+
+$spreadsheet->getActiveSheet()->fromArray($dataArray, null, 'A1');
+
+// Create Table
+$helper->log('Create Table');
+$table = new Table();
+$table->setName('Sales_Data');
+$table->setRange('A1:G15');
+
+// Set Column Formula
+$table->getColumn('G')->setColumnFormula($columnFormula);
+
+// Add Table to Worksheet
+$helper->log('Add Table to Worksheet');
+$spreadsheet->getActiveSheet()->addTable($table);
+
+// Save
+$path = $helper->getFilename(__FILE__);
+$writer = IOFactory::createWriter($spreadsheet, 'Xlsx');
+
+// Disable precalculation to add table's total row
+$writer->setPreCalculateFormulas(false);
+$callStartTime = microtime(true);
+$writer->save($path);
+$helper->logWrite($writer, $path, $callStartTime);
+$helper->logEndingNotes();

src/PhpSpreadsheet/Worksheet/Table/Column.php

@@ -41,6 +41,13 @@ class Column
      */
     private $totalsRowFormula;
 
+    /**
+     * Column Formula.
+     *
+     * @var string
+     */
+    private $columnFormula;
+
     /**
      * Table.
      *
@@ -178,6 +185,28 @@ class Column
         return $this;
     }
 
+    /**
+     * Get column Formula.
+     *
+     * @return string
+     */
+    public function getColumnFormula()
+    {
+        return $this->columnFormula;
+    }
+
+    /**
+     * Set column Formula.
+     *
+     * @return  $this
+     */
+    public function setColumnFormula(string $columnFormula)
+    {
+        $this->columnFormula = $columnFormula;
+
+        return $this;
+    }
+
     /**
      * Get this Column's Table.
      *

src/PhpSpreadsheet/Writer/Xlsx/Table.php

@@ -86,6 +86,10 @@ class Table extends WriterPart
                     $objWriter->writeAttribute('totalsRowFunction', $column->getTotalsRowFunction());
                 }
             }
+            if ($column->getColumnFormula()) {
+                $objWriter->writeElement('calculatedColumnFormula', $column->getColumnFormula());
+            }
+
             $objWriter->endElement();
         }
         $objWriter->endElement();

tests/PhpSpreadsheetTests/Worksheet/Table/ColumnTest.php

@@ -74,6 +74,11 @@ class ColumnTest extends SetupTeardown
         $result = $column->setTotalsRowFunction($function);
         self::assertInstanceOf(Column::class, $result);
         self::assertEquals($function, $column->getTotalsRowFunction());
+
+        $formula = '=SUM(Sales_Data[[#This Row],[Q1]:[Q4]])';
+        $result = $column->setColumnFormula($formula);
+        self::assertInstanceOf(Column::class, $result);
+        self::assertEquals($formula, $column->getColumnFormula());
     }
 
     public function testTable(): void