fix(google-sheets): support multi-letter column names (AA, AH, ZZ, etc.) in range operations by Copilot · Pull Request #1 · whitesmith/pipedream

Copilot · 2026-03-20T16:10:19Z

WHY

Column-to-index conversion used charCodeAt(0) - 65, which silently truncates multi-letter columns — "AH" becomes "A" (index 0), "ZZ" becomes "Z" (index 25). Any range operation on columns past Z silently applies to the wrong column.

Root cause: 7 call sites across formatting, validation, merge, and protection actions all used the single-char hack instead of a proper base-26 decode.

Fix: Replaced all broken charCodeAt(0) usages with the existing _getColumnIndex method, which already implements the correct base-26 algorithm (A→1, Z→26, AA→27, AH→34, ZZ→702):

// Before (broken for multi-letter columns)
startColumnIndex: startCol.charCodeAt(0) - 65,
endColumnIndex:   endCol.charCodeAt(0) - 64,

// After
startColumnIndex: this.googleSheets._getColumnIndex(startCol) - 1, // 0-based
endColumnIndex:   this.googleSheets._getColumnIndex(endCol),       // exclusive end

Files updated:

google_sheets.app.mjs — resetRowFormat fixed
update-formatting.mjs
merge-cells.mjs
add-conditional-format-rule.mjs
set-data-validation.mjs
update-conditional-format-rule.mjs
add-protected-range.mjs

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…ions Co-authored-by: tomasmcm <6323928+tomasmcm@users.noreply.github.com>

tomasmcm · 2026-03-20T16:30:00Z

@copilot there is already a _getColumnIndex why don't we use that instead?

Copilot

Pull request overview

This PR fixes Google Sheets range operations for columns beyond Z by replacing single-character ASCII math with a proper base-26 column-letter decoder, ensuring ranges like AA:AH map to the correct grid indices.

Changes:

Added _columnLetterToIndex(col) helper to convert multi-letter column names to 0-based indices.
Updated range-building logic to use _columnLetterToIndex across formatting, conditional formatting, data validation, merge, and protected range actions.
Adjusted end column handling to consistently use Google Sheets API’s exclusive endColumnIndex.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
components/google_sheets/google_sheets.app.mjs	Adds `_columnLetterToIndex` helper and updates `resetRowFormat` to support multi-letter columns.
components/google_sheets/actions/update-formatting/update-formatting.mjs	Uses `_columnLetterToIndex` for correct start/end column indices in formatting updates.
components/google_sheets/actions/merge-cells/merge-cells.mjs	Uses `_columnLetterToIndex` for correct column indices when merging ranges.
components/google_sheets/actions/add-conditional-format-rule/add-conditional-format-rule.mjs	Uses `_columnLetterToIndex` so conditional formatting ranges work past column `Z`.
components/google_sheets/actions/set-data-validation/set-data-validation.mjs	Uses `_columnLetterToIndex` so validation ranges work past column `Z`.
components/google_sheets/actions/update-conditional-format-rule/update-conditional-format-rule.mjs	Uses `_columnLetterToIndex` for correct conditional format rule update ranges.
components/google_sheets/actions/add-protected-range/add-protected-range.mjs	Uses `_columnLetterToIndex` so protected ranges work past column `Z`.

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Copilot · 2026-03-20T16:31:08Z

components/google_sheets/google_sheets.app.mjs

+     */
+    _columnLetterToIndex(col) {
+      if (!col) return 0;
+      let index = 0;
+      const upper = col.toUpperCase();
+      for (let i = 0; i < upper.length; i++) {
+        index = index * 26 + (upper.charCodeAt(i) - 64);


_columnLetterToIndex currently defaults to 0 when col is falsy, and it will also happily compute an index for non A–Z characters (e.g. $A$ , whitespace), which can yield negative/incorrect indices and silently target the wrong range. Consider validating col (string, non-empty, ^[A-Z]+$ after normalization/stripping $) and throwing an error instead of defaulting to column A.

Suggested change

*/

_columnLetterToIndex(col) {

if (!col) return 0;

let index = 0;

const upper = col.toUpperCase();

for (let i = 0; i < upper.length; i++) {

index = index * 26 + (upper.charCodeAt(i) - 64);

* @throws {Error} If the column reference is not a non-empty A–Z string.

*/

_columnLetterToIndex(col) {

if (!isString(col)) {

throw new Error("Column reference must be a non-empty string");

}

// Normalize: remove absolute-reference markers, trim whitespace, and uppercase

const normalized = col.replace(/\$/g, "").trim().toUpperCase();

// Validate: must be non-empty and contain only A–Z characters

if (!normalized || !/^[A-Z]+$/.test(normalized)) {

throw new Error(`Invalid column reference: "${col}"`);

}

let index = 0;

for (let i = 0; i < normalized.length; i++) {

index = index * 26 + (normalized.charCodeAt(i) - 64);

Copilot · 2026-03-20T16:31:09Z

components/google_sheets/google_sheets.app.mjs

+      let index = 0;
+      const upper = col.toUpperCase();
+      for (let i = 0; i < upper.length; i++) {
+        index = index * 26 + (upper.charCodeAt(i) - 64);
+      }
+      return index - 1; // 0-based for Google Sheets API


This helper duplicates the existing _getColumnIndex(column) base-26 logic in this file (which already supports multi-letter columns). To reduce divergence risk, consider implementing _columnLetterToIndex in terms of _getColumnIndex (or consolidating to a single helper with clear 0-based vs 1-based semantics) and avoid the magic -64 constant for readability.

Suggested change

let index = 0;

const upper = col.toUpperCase();

for (let i = 0; i < upper.length; i++) {

index = index * 26 + (upper.charCodeAt(i) - 64);

}

return index - 1; // 0-based for Google Sheets API

// Delegate to the existing helper that converts a column letter to a 1-based index,

// then convert to a 0-based index for use with the Google Sheets API.

const oneBasedIndex = this._getColumnIndex(col);

return oneBasedIndex - 1;

…helper Co-authored-by: tomasmcm <6323928+tomasmcm@users.noreply.github.com>

Copilot · 2026-03-20T16:38:09Z

@copilot there is already a _getColumnIndex why don't we use that instead?

Good call — replaced _columnLetterToIndex with the existing _getColumnIndex across all call sites and removed the new helper entirely. _getColumnIndex already handles multi-letter columns correctly; callers now use _getColumnIndex(col) - 1 for the 0-based start index and _getColumnIndex(col) for the exclusive end index. Committed in 267cf5e.

tomasmcm · 2026-03-23T19:56:28Z

@copilot this got approved, can you run this command to bump the version codes?

sed -i 0,/0.1.14/{s/0.1.14/0.1.15/} components/google_sheets/actions/add-column/add-column.mjs && sed -i 0,/0.2.18/{s/0.2.18/0.2.19/} components/google_sheets/actions/add-multiple-rows/add-multiple-rows.mjs && sed -i 0,/2.2.1/{s/2.2.1/2.2.2/} components/google_sheets/actions/add-single-row/add-single-row.mjs && sed -i 0,/0.1.18/{s/0.1.18/0.1.19/} components/google_sheets/actions/clear-cell/clear-cell.mjs && sed -i 0,/0.1.16/{s/0.1.16/0.1.17/} components/google_sheets/actions/clear-rows/clear-rows.mjs && sed -i 0,/0.1.14/{s/0.1.14/0.1.15/} components/google_sheets/actions/copy-worksheet/copy-worksheet.mjs && sed -i 0,/0.1.16/{s/0.1.16/0.1.17/} components/google_sheets/actions/create-spreadsheet/create-spreadsheet.mjs && sed -i 0,/0.1.14/{s/0.1.14/0.1.15/} components/google_sheets/actions/create-worksheet/create-worksheet.mjs && sed -i 0,/0.0.1/{s/0.0.1/0.0.2/} components/google_sheets/actions/delete-conditional-format-rule/delete-conditional-format-rule.mjs && sed -i 0,/0.0.14/{s/0.0.14/0.0.15/} components/google_sheets/actions/delete-rows/delete-rows.mjs && sed -i 0,/0.1.14/{s/0.1.14/0.1.15/} components/google_sheets/actions/delete-worksheet/delete-worksheet.mjs && sed -i 0,/0.2.17/{s/0.2.17/0.2.18/} components/google_sheets/actions/find-row/find-row.mjs && sed -i 0,/0.1.16/{s/0.1.16/0.1.17/} components/google_sheets/actions/get-cell/get-cell.mjs && sed -i 0,/0.0.2/{s/0.0.2/0.0.3/} components/google_sheets/actions/get-current-user/get-current-user.mjs && sed -i 0,/0.1.15/{s/0.1.15/0.1.16/} components/google_sheets/actions/get-spreadsheet-by-id/get-spreadsheet-by-id.mjs && sed -i 0,/0.1.16/{s/0.1.16/0.1.17/} components/google_sheets/actions/get-values-in-range/get-values-in-range.mjs && sed -i 0,/0.1.14/{s/0.1.14/0.1.15/} components/google_sheets/actions/insert-anchored-note/insert-anchored-note.mjs && sed -i 0,/0.1.15/{s/0.1.15/0.1.16/} components/google_sheets/actions/insert-comment/insert-comment.mjs && sed -i 0,/0.0.1/{s/0.0.1/0.0.2/} components/google_sheets/actions/insert-dimension/insert-dimension.mjs && sed -i 0,/0.1.14/{s/0.1.14/0.1.15/} components/google_sheets/actions/list-worksheets/list-worksheets.mjs && sed -i 0,/0.0.1/{s/0.0.1/0.0.2/} components/google_sheets/actions/move-dimension/move-dimension.mjs && sed -i 0,/0.1.16/{s/0.1.16/0.1.17/} components/google_sheets/actions/update-cell/update-cell.mjs && sed -i 0,/0.1.16/{s/0.1.16/0.1.17/} components/google_sheets/actions/update-multiple-rows/update-multiple-rows.mjs && sed -i 0,/0.1.18/{s/0.1.18/0.1.19/} components/google_sheets/actions/update-row/update-row.mjs && sed -i 0,/0.1.18/{s/0.1.18/0.1.19/} components/google_sheets/actions/upsert-row/upsert-row.mjs && sed -i 0,/0.1.4/{s/0.1.4/0.1.5/} components/google_sheets/sources/new-comment/new-comment.mjs && sed -i 0,/0.0.2/{s/0.0.2/0.0.3/} components/google_sheets/sources/new-comment-polling/new-comment-polling.mjs && sed -i 0,/0.2.4/{s/0.2.4/0.2.5/} components/google_sheets/sources/new-row-added/new-row-added.mjs && sed -i 0,/0.1.4/{s/0.1.4/0.1.5/} components/google_sheets/sources/new-row-added-polling/new-row-added-polling.mjs && sed -i 0,/0.3.5/{s/0.3.5/0.3.6/} components/google_sheets/sources/new-updates/new-updates.mjs && sed -i 0,/0.0.3/{s/0.0.3/0.0.4/} components/google_sheets/sources/new-updates-polling/new-updates-polling.mjs && sed -i 0,/0.2.4/{s/0.2.4/0.2.5/} components/google_sheets/sources/new-worksheet/new-worksheet.mjs && sed -i 0,/0.0.2/{s/0.0.2/0.0.3/} components/google_sheets/sources/new-worksheet-polling/new-worksheet-polling.mjs

Initial plan

3fdbc3b

Copilot AI assigned Copilot and tomasmcm Mar 20, 2026

Copilot started work on behalf of tomasmcm March 20, 2026 16:10 View session

fix(google-sheets): support multi-letter column names in range operat…

302f615

…ions Co-authored-by: tomasmcm <6323928+tomasmcm@users.noreply.github.com>

Copilot AI changed the title ~~[WIP] Fix multi-letter column support in range parsing~~ fix(google-sheets): support multi-letter column names (AA, AH, ZZ, etc.) in range operations Mar 20, 2026

Copilot AI requested a review from tomasmcm March 20, 2026 16:14

Copilot finished work on behalf of tomasmcm March 20, 2026 16:14

tomasmcm requested a review from Copilot March 20, 2026 16:15

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tomasmcm requested review from Copilot and removed request for Copilot March 20, 2026 16:27

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refactor(google-sheets): use existing _getColumnIndex instead of new …

267cf5e

…helper Co-authored-by: tomasmcm <6323928+tomasmcm@users.noreply.github.com>

Copilot finished work on behalf of tomasmcm March 20, 2026 16:40

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Copilot stopped work on behalf of tomasmcm due to an error March 23, 2026 19:57
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tomasmcm added 2 commits March 23, 2026 20:00

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fix(google-sheets): support multi-letter column names (AA, AH, ZZ, etc.) in range operations#1

fix(google-sheets): support multi-letter column names (AA, AH, ZZ, etc.) in range operations#1
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-     */
-    _columnLetterToIndex(col) {
-      if (!col) return 0;
-      let index = 0;
-      const upper = col.toUpperCase();
-      for (let i = 0; i < upper.length; i++) {
-        index = index * 26 + (upper.charCodeAt(i) - 64);
+     * @throws {Error} If the column reference is not a non-empty A–Z string.
+     */
+    _columnLetterToIndex(col) {
+      if (!isString(col)) {
+        throw new Error("Column reference must be a non-empty string");
+      }
+      // Normalize: remove absolute-reference markers, trim whitespace, and uppercase
+      const normalized = col.replace(/\$/g, "").trim().toUpperCase();
+      // Validate: must be non-empty and contain only A–Z characters
+      if (!normalized || !/^[A-Z]+$/.test(normalized)) {
+        throw new Error(`Invalid column reference: "${col}"`);
+      }
+      let index = 0;
+      for (let i = 0; i < normalized.length; i++) {
+        index = index * 26 + (normalized.charCodeAt(i) - 64);

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