MYSQL UNION SELECT LIMIT BUG

Src/Asp.Net/SqlSugar/Abstract/SqlBuilderProvider/SqlBuilderProvider.cs

@@ -98,11 +98,11 @@ namespace SqlSugar
         }
         public virtual string GetUnionAllSql(List<string> sqlList)
         {
-            return string.Join("UNION ALL \r\n", sqlList);
+            return string.Join(" UNION ALL \r\n", sqlList);
         }
         public virtual string GetUnionSql(List<string> sqlList)
         {
-            return string.Join("UNION \r\n", sqlList);
+            return string.Join(" UNION \r\n", sqlList);
         }
         public virtual void RepairReplicationParameters(ref string appendSql, SugarParameter[] parameters, int addIndex)
         {