From d5b0937015225ae7d1cef3f629321a15b88f2941 Mon Sep 17 00:00:00 2001
From: shaohuzhang1 <80892890+shaohuzhang1@users.noreply.github.com>
Date: Fri, 24 May 2024 16:30:48 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20=E4=BF=AE=E5=A4=8D=E5=88=A0=E9=99=A4?=
 =?UTF-8?q?=E6=96=87=E6=A1=A3=E6=9C=80=E5=90=8E=E4=B8=80=E4=B8=AA=E5=88=86?=
 =?UTF-8?q?=E6=AE=B5=E6=8A=A5=E9=94=99=20(#534)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 apps/dataset/sql/update_document_char_length.sql | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/apps/dataset/sql/update_document_char_length.sql b/apps/dataset/sql/update_document_char_length.sql
index a09c8cab..4a4060cd 100644
--- a/apps/dataset/sql/update_document_char_length.sql
+++ b/apps/dataset/sql/update_document_char_length.sql
@@ -1,4 +1,7 @@
 UPDATE "document"
-SET "char_length" = ( SELECT "sum" ( "char_length" ( "content" ) ) FROM paragraph WHERE "document_id" = %s )
+SET "char_length" = ( SELECT CASE WHEN
+		"sum" ( "char_length" ( "content" ) ) IS NULL THEN
+			0 ELSE "sum" ( "char_length" ( "content" ) )
+		END FROM paragraph WHERE "document_id" = %s )
 WHERE
 	"id" = %s
\ No newline at end of file