dump: always split TiDB v4.* tables through tidb rowid to save TiDB's…

… memory (pingcap#273)

tests/primary_key/data/pk_case_3.sql

@@ -1,14 +1,14 @@
 # test random order and no primary key
-create table `pk_case_3` (a int, b int);
+create table `pk_case_3` (a int, b int, g geometry);
 insert into `pk_case_3` values
-(6, 4),
-(4, 6),
-(8, 2),
-(3, 7),
-(1, 9),
-(2, 8),
-(5, 5),
-(10, 0),
-(0, 10),
-(9, 1),
-(7, 3);
+(6, 4, ST_GeomFromText('POINT(1 1)')),
+(4, 6, ST_GeomFromText('LINESTRING(2 1, 6 6)')),
+(8, 2, NULL),
+(3, 7, NULL),
+(1, 9, NULL),
+(2, 8, NULL),
+(5, 5, NULL),
+(10, 0, NULL),
+(0, 10, NULL),
+(9, 1, NULL),
+(7, 3, NULL);

tests/primary_key/result/pk_case_3.sql

@@ -1,13 +1,13 @@
 /*!40101 SET NAMES binary*/;
 INSERT INTO `pk_case_3` VALUES
-(6,4),
-(4,6),
-(8,2),
-(3,7),
-(1,9),
-(2,8),
-(5,5),
-(10,0),
-(0,10),
-(9,1),
-(7,3);
+(6,4,x'000000000101000000000000000000f03f000000000000f03f'),
+(4,6,x'000000000102000000020000000000000000000040000000000000f03f00000000000018400000000000001840'),
+(8,2,NULL),
+(3,7,NULL),
+(1,9,NULL),
+(2,8,NULL),
+(5,5,NULL),
+(10,0,NULL),
+(0,10,NULL),
+(9,1,NULL),
+(7,3,NULL);

v4/export/config.go

@@ -565,6 +565,7 @@ var (
 
 // ServerInfo is the combination of ServerType and ServerInfo
 type ServerInfo struct {
+	HasTiKV       bool
 	ServerType    ServerType
 	ServerVersion *semver.Version
 }