您可以使用CHECK GLOBAL INDEX語句檢查主表和索引表的數(shù)據(jù)是否完全一致，并修訂不一致的數(shù)據(jù)。
語法
CHECK GLOBAL INDEX gsi_name [ON tbl_name] [extra_cmd]| 參數(shù) | 說明 |
|---|---|
gsi_name |
需要校驗的全局二級索引名。 |
tbl_name |
全局二級索引所在的主表，非必選。若您輸入具體主表名稱，將會檢查全局二級索引表和主表間的索引關(guān)系是否正確。 |
extra_cmd |
保留的額外指令，目前支持如下指令：
|
說明
- 對全局二級索引表中的數(shù)據(jù)進行校驗或訂正時會占用一定的系統(tǒng)資源，特別是訂正操作會對主表或索引表內(nèi)數(shù)據(jù)分批加鎖并訂正，建議您在業(yè)務(wù)低谷期進行操作。更多關(guān)于GSI的使用方式，請參見全局二級索引。
- 對大表的GSI校驗可能會花費較多的時間，可以使用HINT指定PURE_ASYNC_DDL_MODE，以純異步模式執(zhí)行DDL語句。
示例
- 您可以使用如下語句進行校驗：
CHECK GLOBAL INDEX `g_i_check`;- 若校驗沒有發(fā)現(xiàn)錯誤，則返回如下結(jié)果：
+-------------+------------+--------+-------------+-----------------------------+ | GSI_TABLE | ERROR_TYPE | STATUS | PRIMARY_KEY | DETAILS | +-------------+------------+--------+-------------+-----------------------------+ | `g_i_check` | SUMMARY | -- | -- | OK (7025/7025 rows checked) | +-------------+------------+--------+-------------+-----------------------------+ 1 row in set (1.40 sec) - 若校驗發(fā)現(xiàn)錯誤，則返回如下結(jié)果：
+-------------+------------+--------+-------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | GSI_TABLE | ERROR_TYPE | STATUS | PRIMARY_KEY | DETAILS | +-------------+------------+--------+-------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | `g_i_check` | ORPHAN | FOUND | (100722) | {"GSI":{"id":100722,"c_timestamp_6":"2000-01-01 00:00:00.000000","c_timestamp_3":"2000-01-01 00:00:00.000","c_timestamp_1":"2000-01-01 00:00:00.0","c_binary":"OTkAAAAAAAAAAA==","c_int_32":271}} | | `g_i_check` | CONFLICT | FOUND | (108710) | {"Primary":{"id":108710,"c_timestamp_6":"2000-01-01 00:00:00.000000","c_timestamp_3":"2000-01-01 00:00:00.000","c_timestamp_1":"2000-01-01 00:00:00.0","c_year":"2000","c_int_32":255},"GSI":{"c_int_32_un":123456,"id":108710,"c_timestamp_6":"2000-01-01 00:00:00.000000","c_timestamp_3":"2000-01-01 00:00:00.000","c_timestamp_1":"2000-01-01 00:00:00.0","c_year":"2000","c_int_32":255}} | | `g_i_check` | MISSING | FOUND | (100090) | {"Primary":{"id":100090,"c_timestamp_6":"2000-01-01 00:00:00.000000","c_timestamp_3":"2000-01-01 00:00:00.000","c_timestamp_1":"2000-01-01 00:00:00.0","c_blob_tiny":"YeS4reWbvWE=","c_int_32":280}} | | `g_i_check` | SUMMARY | -- | -- | 3 error found (7025/7025 rows checked) | +-------------+------------+--------+-------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ 4 rows in set (1.92 sec)說明 如果數(shù)據(jù)存在多種錯誤，同一行數(shù)據(jù)會報多個ERROR_TYPE值。
- 若校驗沒有發(fā)現(xiàn)錯誤，則返回如下結(jié)果：
- 您可以使用如下語句進行訂正：
CHECK GLOBAL INDEX g_i_check CORRECTION_BASED_ON_PRIMARY;返回結(jié)果如下：
+-------------+------------+--------+-------------+------------------------------------------------------------------------+ | GSI_TABLE | ERROR_TYPE | STATUS | PRIMARY_KEY | DETAILS | +-------------+------------+--------+-------------+------------------------------------------------------------------------+ | `g_i_check` | SUMMARY | -- | -- | Done. Use SQL: { CHECK GLOBAL INDEX `g_i_check` SHOW; } to get result. | +-------------+------------+--------+-------------+------------------------------------------------------------------------+ 1 row in set (1.40 sec) - 您可以使用如下語句查看最近一次校驗或訂正的報告：
CHECK GLOBAL INDEX `g_i_check` SHOW;返回結(jié)果如下：
+-------------+------------+----------+-------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | GSI_TABLE | ERROR_TYPE | STATUS | PRIMARY_KEY | DETAILS | +-------------+------------+----------+-------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | `g_i_check` | MISSING | REPAIRED | (100090) | {"Primary":{"id":100090,"c_timestamp_6":"2000-01-01 00:00:00.000000","c_timestamp_3":"2000-01-01 00:00:00.000","c_timestamp_1":"2000-01-01 00:00:00.0","c_blob_tiny":"YeS4reWbvWE=","c_int_32":280}} | | `g_i_check` | CONFLICT | REPAIRED | (108710) | {"Primary":{"id":108710,"c_timestamp_6":"2000-01-01 00:00:00.000000","c_timestamp_3":"2000-01-01 00:00:00.000","c_timestamp_1":"2000-01-01 00:00:00.0","c_year":"2000","c_int_32":255},"GSI":{"c_int_32_un":123456,"id":108710,"c_timestamp_6":"2000-01-01 00:00:00.000000","c_timestamp_3":"2000-01-01 00:00:00.000","c_timestamp_1":"2000-01-01 00:00:00.0","c_year":"2000","c_int_32":255}} | | `g_i_check` | ORPHAN | REPAIRED | (100722) | {"GSI":{"id":100722,"c_timestamp_6":"2000-01-01 00:00:00.000000","c_timestamp_3":"2000-01-01 00:00:00.000","c_timestamp_1":"2000-01-01 00:00:00.0","c_binary":"OTkAAAAAAAAAAA==","c_int_32":271}} | | `g_i_check` | SUMMARY | -- | -- | 3 error found (7025/7026 rows checked.) Finish time: 2020-01-13 14:41:51.0 | +-------------+------------+----------+-------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ 4 rows in set (0.02 sec)
| 列名 | 說明 |
|---|---|
| GSI_TABLE | 全局二級索引名。 |
| ERROR_TYPE | 錯誤類型，取值范圍如下：
|
| STATUS | 狀態(tài)，取值范圍如下：
|
| PRIMARY_KEY | 主鍵。 |
| DETAILS | 錯誤的詳細信息。 |