From 557081c8f80974e77af21dfdcce71e337459d597 Mon Sep 17 00:00:00 2001
From: wizardchen <wizardchen@tencent.com>
Date: Wed, 24 Dec 2025 17:48:06 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20=E4=BF=AE=E5=A4=8D=E4=B8=8D=E5=90=8C?=
 =?UTF-8?q?=E6=95=B0=E6=8D=AE=E5=BA=93=E7=B1=BB=E5=9E=8B=E7=9A=84JSON?=
 =?UTF-8?q?=E6=9F=A5=E8=AF=A2=E5=85=BC=E5=AE=B9=E6=80=A7=E9=97=AE=E9=A2=98?=
 =?UTF-8?q?=EF=BC=8C=E6=94=AF=E6=8C=81MySQL=E5=92=8CPostgreSQL=E7=9A=84?=
 =?UTF-8?q?=E5=B7=AE=E5=BC=82=E5=A4=84=E7=90=86?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 internal/application/repository/chunk.go | 29 ++++++++++++++++++++----
 1 file changed, 25 insertions(+), 4 deletions(-)

diff --git a/internal/application/repository/chunk.go b/internal/application/repository/chunk.go
index 81216dbff..b7a71ea71 100644
--- a/internal/application/repository/chunk.go
+++ b/internal/application/repository/chunk.go
@@ -98,19 +98,40 @@ func (r *chunkRepository) ListPagedChunksByKnowledgeID(
 		}
 		if keyword != "" {
 			like := "%" + keyword + "%"
+			// 根据数据库类型使用不同的 JSON 查询语法
+			isPostgres := db.Dialector.Name() == "postgres"
+
 			switch searchField {
 			case "standard_question":
 				// Search only in standard_question field of metadata
-				db = db.Where("metadata->>'standard_question' ILIKE ?", like)
+				if isPostgres {
+					db = db.Where("metadata->>'standard_question' ILIKE ?", like)
+				} else {
+					// MySQL: metadata->>'$.standard_question' (MySQL 5.7.13+)
+					// 也可以用 JSON_UNQUOTE(JSON_EXTRACT(metadata, '$.standard_question'))
+					db = db.Where("metadata->>'$.standard_question' LIKE ?", like)
+				}
 			case "similar_questions":
 				// Search in similar_questions array of metadata
-				db = db.Where("metadata->'similar_questions'::text ILIKE ?", like)
+				if isPostgres {
+					db = db.Where("metadata->'similar_questions'::text ILIKE ?", like)
+				} else {
+					db = db.Where("JSON_EXTRACT(metadata, '$.similar_questions') LIKE ?", like)
+				}
 			case "answers":
 				// Search in answers array of metadata
-				db = db.Where("metadata->'answers'::text ILIKE ?", like)
+				if isPostgres {
+					db = db.Where("metadata->'answers'::text ILIKE ?", like)
+				} else {
+					db = db.Where("JSON_EXTRACT(metadata, '$.answers') LIKE ?", like)
+				}
 			default:
 				// Search in all fields (content and metadata)
-				db = db.Where("(content ILIKE ? OR metadata::text ILIKE ?)", like, like)
+				if isPostgres {
+					db = db.Where("(content ILIKE ? OR metadata::text ILIKE ?)", like, like)
+				} else {
+					db = db.Where("(content LIKE ? OR CAST(metadata AS CHAR) LIKE ?)", like, like)
+				}
 			}
 		}
 		return db