duplicated views with the same name been created #58769
Description
Bug Report
Please answer these questions before submitting your issue. Thanks!
1. Minimal reproduce step (Required)
This is found in one of our customer's environment.
files contain sensitive information removed
They found that the result of select INFORMATION_SCHEMA.TABLES and select the specific table mismatch.
Then they drop that view, but later found a view can not be dropped (select by table id can see that view, but select drop always fail)
After investigate their ddi history, the root cause is that we don't prevent create views twice with same name
...
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"generated_stored": false,
"dependences": null,
"type": {
"Tp": 0,
"Flag": 0,
"Flen": 0,
"Decimal": 0,
"Charset": "",
"Collate": "",
"Elems": null,
"ElemsIsBinaryLit": null,
"Array": false
},
"state": 5,
"comment": "",
"hidden": false,
"change_state_info": null,
"version": 0
},
{
"id": 14,
"name": {
"O": "invld_flg",
"L": "invld_flg"
},
"offset": 13,
"origin_default": null,
"origin_default_bit": null,
"default": null,
"default_bit": null,
"default_is_expr": false,
"generated_expr_string": "",
"generated_stored": false,
"dependences": null,
"type": {
"Tp": 0,
"Flag": 0,
"Flen": 0,
"Decimal": 0,
"Charset": "",
"Collate": "",
"Elems": null,
"ElemsIsBinaryLit": null,
"Array": false
},
"state": 5,
"comment": "",
"hidden": false,
"change_state_info": null,
"version": 0
}
],
"index_info": null,
"constraint_info": null,
"fk_info": null,
"state": 5,
"pk_is_handle": false,
"is_common_handle": false,
"common_handle_version": 0,
"comment": "",
"auto_inc_id": 0,
"auto_id_cache": 0,
"auto_rand_id": 0,
"max_col_id": 14,
"max_idx_id": 0,
"max_fk_id": 0,
"max_cst_id": 0,
"update_timestamp": 454345957449400350,
"ShardRowIDBits": 0,
"max_shard_row_id_bits": 0,
"auto_random_bits": 0,
"auto_random_range_bits": 0,
"pre_split_regions": 0,
"partition": null,
"compression": "",
"view": {
"view_algorithm": 0,
"view_definer": {
"Username": "root",
"Hostname": "100.127.232.15",
"CurrentUser": false,
"AuthUsername": "root",
"AuthHostname": "%",
"AuthPlugin": "mysql_native_password"
},
"view_security": 0,
"view_select": "SELECT `a`.`MDC_ORG_CD` AS `org_id`,`a`.`MDC_ORG_NM` AS `org_nm`,`a`.`DCT_CD` AS `dct_cd`,`a`.`DCT_NM` AS `dct_nm`,NULL AS `doc_fct`,`a`.`DCT_ID_CRD_NO` AS `id_crd_no`,`a`.`DCT_TEL_NO` AS `slf_tel_no`,`a`.`STRT_USE_STTS` AS `is_enable`,1 AS `sgn_dct`,`a`.`CRT_TM` AS `crt_tm`,NULL AS `mdcr_act`,NULL AS `ascrn_dses_rgt`,`a`.`UPD_DT` AS `upt_tm`,0 AS `invld_flg` FROM `cdr_5721`.`PBLC_FML_DCT_BSC_INFMT` AS `a` WHERE LENGTH(`a`.`DCT_CD`) IN (7,8,9) AND LENGTH(`a`.`DCT_ID_CRD_NO`)=_UTF8MB4'18' AND `a`.`DCT_ID_CRD_NO` NOT LIKE _UTF8MB4'0000%' AND `a`.`DCT_ID_CRD_NO` NOT LIKE _UTF8MB4'%0000' AND SUBSTR(`a`.`DCT_ID_CRD_NO`, 7, 8) REGEXP _UTF8MB4'(((19|20)([0-9]{2}))(((0[13578]|1[02])(0[1-9]|[12][0-9]|3[01]))|((0[469]|11)(0[1-9]|[12][0-9]|30))|(02(0[1-9]|[1][0-9]|2[0-8]))))|((([0-9]{2})(0[48]|[2468][048]|[13579][26])|((0[48]|[2468][048]|[3579][26])00))0229)'",
"view_checkoption": 1,
"view_cols": null
},
"sequence": null,
"Lock": null,
"version": 5,
"tiflash_replica": null,
"is_columnar": false,
"temp_table_type": 0,
"cache_table_status": 0,
"policy_ref_info": null,
"stats_options": null,
"exchange_partition_info": null,
"ttl_info": null,
"revision": 0
},
"FinishedTS": 454345961393881115,
"MultipleTableInfos": null
},
"version": 1,
"reorg_meta": null,
"multi_schema_info": null,
"priority": 0,
"seq_num": 10298,
"charset": "",
"collate": "",
"admin_operator": 0,
"trace_info": {
"connection_id": 1996817658,
"session_alias": ""
}
},
...
2. What did you expect to see? (Required)
Try to reproduce it with unit test:
func TestCreateViewTwice(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk2 := testkit.NewTestKit(t, store)
tk.MustExec("use test")
tk.MustExec("create table t_raw (id int)")
tk2.MustExec("use test")
var wg sync.WaitGroup
wg.Add(1)
first := true
testfailpoint.EnableCall(t, "github.com/pingcap/tidb/pkg/ddl/beforeDeliveryJob", func(job *model.Job) {
if first {
first = false
go func() {
defer wg.Done()
tk2.MustExecToErr("create view v as select * from t_raw where id > 666")
}()
}
})
tk.MustExec("create view v as select * from t_raw")
wg.Wait()
}
The test should pass
3. What did you see instead (Required)
Test failed.
4. What is your TiDB version? (Required)
v7.5.3