test: align with TiDB clustered index behaviour

tests/sequence_sharding_optimistic/run.sh

@@ -157,7 +157,7 @@ run() {
     # try to get schema for the table, the latest schema got.
     curl -X PUT ${API_URL} -d '{"op":1, "task":"sequence_sharding_optimistic", "sources": ["mysql-replica-01"], "database":"sharding_seq_opt", "table":"t1"}' > ${WORK_DIR}/get_schema.log
     # this is NON-CLUSTERED index
-    check_log_contains ${WORK_DIR}/get_schema.log 'CREATE TABLE `t1` ( `id` bigint(20) NOT NULL, `c2` varchar(20) DEFAULT NULL, `c3` int(11) DEFAULT NULL, PRIMARY KEY (`id`) /\*T!\[clustered_index\] NONCLUSTERED \*/) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_bin' 1
+    check_log_contains ${WORK_DIR}/get_schema.log 'CREATE TABLE `t1` ( `id` bigint(20) NOT NULL, `c2` varchar(20) DEFAULT NULL, `c3` int(11) DEFAULT NULL, PRIMARY KEY (`id`) .*) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_bin' 1
 
     # drop the schema.
     curl -X PUT ${API_URL} -d '{"op":3, "task":"sequence_sharding_optimistic", "sources": ["mysql-replica-01"], "database":"sharding_seq_opt", "table":"t1"}' > ${WORK_DIR}/remove_schema.log
@@ -188,7 +188,7 @@ run() {
     curl -X PUT ${API_URL} -d '{"op":1, "task":"sequence_sharding_optimistic", "sources": ["mysql-replica-01"], "database":"sharding_seq_opt", "table":"t1"}' > ${WORK_DIR}/get_schema.log
     cat ${WORK_DIR}/get_schema.log
     # schema tracker enables alter-primary-key, so this is NONCLUSTERED index
-    check_log_contains ${WORK_DIR}/get_schema.log 'CREATE TABLE `t1` ( `id` bigint(20) NOT NULL, `c2` varchar(20) DEFAULT NULL, `c3` bigint(11) DEFAULT NULL, PRIMARY KEY (`id`) /\*T!\[clustered_index\] NONCLUSTERED \*/) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_bin' 1
+    check_log_contains ${WORK_DIR}/get_schema.log 'CREATE TABLE `t1` ( `id` bigint(20) NOT NULL, `c2` varchar(20) DEFAULT NULL, `c3` bigint(11) DEFAULT NULL, PRIMARY KEY (`id`) .*) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_bin' 1
 
     # more data
     run_sql_file $cur/data/db1.increment2.sql $MYSQL_HOST1 $MYSQL_PORT1 $MYSQL_PASSWORD1

tests/shardddl3/conf/tidb-alter-pk-config.toml

@@ -0,0 +1,6 @@
+# TiDB Configuration.
+
+# alter-primary-key is used to control alter primary key feature. Default is false, indicate the alter primary key feature is disabled.
+# If it is true, we can add the primary key by "alter table". However, if a table already exists before the switch is turned true and the data type of its primary key column is an integer,
+# the primary key cannot be dropped.
+alter-primary-key = true

tests/shardddl3/run.sh

@@ -114,9 +114,15 @@ function DM_078_CASE() {
 }
 
 function DM_078() {
+    # start a TiDB alter-pk
+    pkill -hup tidb-server 2>/dev/null || true
+    wait_process_exit tidb-server
+    run_tidb_server 4000 $TIDB_PASSWORD $cur/conf/tidb-alter-pk-config.toml
+
     run_case 078 "single-source-pessimistic" "run_sql_source1 \"create table ${shardddl1}.${tb1} (id int unique, a int, b varchar(10));\"" "clean_table" ""
     run_case 078 "single-source-optimistic" "run_sql_source1 \"create table ${shardddl1}.${tb1} (id int unique, a int, b varchar(10));\"" "clean_table" ""
 
+    # don't revert tidb until DM_079
 }
 
 function DM_079_CASE() {
@@ -130,6 +136,11 @@ function DM_079_CASE() {
 function DM_079() {
     run_case 079 "single-source-pessimistic" "run_sql_source1 \"create table ${shardddl1}.${tb1} (a int primary key, b varchar(10));\"" "clean_table" ""
     run_case 079 "single-source-optimistic" "run_sql_source1 \"create table ${shardddl1}.${tb1} (a int primary key, b varchar(10));\"" "clean_table" ""
+
+    # revert tidb
+    pkill -hup tidb-server 2>/dev/null || true
+    wait_process_exit tidb-server
+    run_tidb_server 4000 $TIDB_PASSWORD
 }
 
 function DM_080_CASE() {