From 95a9c26a9f2e09e690e935ffd7322f39c340dea8 Mon Sep 17 00:00:00 2001
From: Sahil More <model64321@gmail.com>
Date: Thu, 26 Aug 2021 13:31:15 +0530
Subject: [PATCH] fix(material/table): Sorting of a string column/property
 breaks if one record contains a number only

If the number is a string and in between strings we treat it as a number and group it at the start/end of the table based on it's ascending or descending. I have fixed the issue in my commit here and I think it will work properly.

Fixes #20140
---
 src/material/table/table-data-source.ts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/material/table/table-data-source.ts b/src/material/table/table-data-source.ts
index 6a69ef49fcd5..167de0cbd807 100644
--- a/src/material/table/table-data-source.ts
+++ b/src/material/table/table-data-source.ts
@@ -183,6 +183,8 @@ export class _MatTableDataSource<T,
       if (valueAType !== valueBType) {
         if (valueAType === 'number') { valueA += ''; }
         if (valueBType === 'number') { valueB += ''; }
+        if ( (valueAType === 'string') && (_isNumberValue(valueA) === true) ) { valueA += ''; }
+        if ( (valueBType === 'string') && (_isNumberValue(valueB) === true) ) { valueB += ''; }
       }
 
       // If both valueA and valueB exist (truthy), then compare the two. Otherwise, check if