From a75d1c65c5f7af459403aac9ac72afb3b68733b1 Mon Sep 17 00:00:00 2001
From: Leon Zhang <martianzhang@hotmail.com>
Date: Wed, 2 Jan 2019 20:49:30 +0800
Subject: [PATCH] fix #176

  JSON datatype only support utf8mb4 now
---
 database/sampling.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/database/sampling.go b/database/sampling.go
index 46bfdef..896c264 100644
--- a/database/sampling.go
+++ b/database/sampling.go
@@ -137,6 +137,9 @@ func (db *Connector) startSampling(onlineConn *sql.DB, database, table string, w
 				values = append(values, "NULL")
 			} else {
 				switch columnTypes[i].DatabaseTypeName() {
+				case "JSON":
+					// https://github.com/XiaoMi/soar/issues/178
+					values = append(values, fmt.Sprintf(`convert(X'%s' using utf8mb4)`, fmt.Sprintf("%x", val)))
 				case "TIMESTAMP", "DATETIME":
 					t, err := time.Parse(time.RFC3339, string(val))
 					if err != nil {
-- 
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