From 379652d2022c5373d679d0d0edddfa53f27b9453 Mon Sep 17 00:00:00 2001
From: Andrea Giudiceandrea <andreaerdna@libero.it>
Date: Tue, 21 Aug 2018 11:08:10 +0200
Subject: [PATCH] delimited text: let field names be numerical value

fixes #19638 "CSV: numeric header gets a trailing underscore + 1"
fixes #13187 "Numeric FIELD names are lost on CSV import"
---
 src/providers/delimitedtext/qgsdelimitedtextfile.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/providers/delimitedtext/qgsdelimitedtextfile.cpp b/src/providers/delimitedtext/qgsdelimitedtextfile.cpp
index b3c820024e0f..33c973ba1c13 100644
--- a/src/providers/delimitedtext/qgsdelimitedtextfile.cpp
+++ b/src/providers/delimitedtext/qgsdelimitedtextfile.cpp
@@ -34,8 +34,7 @@ QgsDelimitedTextFile::QgsDelimitedTextFile( const QString &url )
   : mFileName( QString() )
   , mEncoding( QStringLiteral( "UTF-8" ) )
   , mDefaultFieldName( QStringLiteral( "field_%1" ) )
-    // field_ is optional in following regexp to simplify QgsDelimitedTextFile::fieldNumber()
-  , mDefaultFieldRegexp( "^(?:field_)?(\\d+)$", Qt::CaseInsensitive )
+  , mDefaultFieldRegexp( "^(?:field_)(\\d+)$", Qt::CaseInsensitive )
 {
   // The default type is CSV
   setTypeCSV();