Extend DDL/MDL info #20329
Extend DDL/MDL info #20329
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Co-authored-by: xixirangrang <hfxsd@hotmail.com>
Co-authored-by: xixirangrang <hfxsd@hotmail.com>
Co-authored-by: xixirangrang <hfxsd@hotmail.com>
| | job_id | bigint | NO | PRI | NULL | | | ||
| | db_name | longtext | YES | | NULL | | | ||
| | table_name | longtext | YES | | NULL | | | ||
| | query | longtext | YES | | NULL | | |
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Should we clarify the different fields as well?
Looking at https://docs.pingcap.com/tidb/stable/metadata-lock/#observability the query is the DDL, and the session ID and SQL_DIGESTS are from the blocking DML queries.
Also there is a mismatch between the lower case names in this table and the UPPER CASE field names in https://docs.pingcap.com/tidb/stable/metadata-lock/#observability.
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I've updated the other doc as well to match the v8.5.1 behavior.
| | SQL_DIGESTS | varchar(5) | YES | | NULL | | | ||
| +-------------+-----------------+------+------+---------+-------+ | ||
| 7 rows in set (0.00 sec) | ||
| ``` |
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Should we also have an example of where it is used, or at least a backlink to https://docs.pingcap.com/tidb/stable/metadata-lock/#observability ?
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On line 8 we link to that information.
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What is changed, added or deleted? (Required)
https://docs.pingcap.com/tidb/stable/metadata-lock#observability gives some useful info, but it is hard to find and this table lacks documentation.
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