functions: Add TIDB_MVCC_INFO, TIDB_ENCODE_INDEX_KEY and TIDB_ENCODE_RECORD_KEY #19715
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| | [`TIDB_ENCODE_SQL_DIGEST()`](#tidb_encode_sql_digest) | Gets a digest for a query string. | | ||
| | [`TIDB_IS_DDL_OWNER()`](#tidb_is_ddl_owner) | Checks whether or not the TiDB instance you are connected to is the DDL Owner. The DDL Owner is the TiDB instance that is tasked with executing DDL statements on behalf of all other nodes in the cluster. | | ||
| | [`TIDB_PARSE_TSO()`](#tidb_parse_tso) | Extracts the physical timestamp from a TiDB TSO timestamp. See also: [`tidb_current_ts`](/system-variables.md#tidb_current_ts). | | ||
| | [`TIDB_MVCC_INFO()`](#tidb_mvcc_info) | Returns MVCC info about a key. | |
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| | [`TIDB_MVCC_INFO()`](#tidb_mvcc_info) | Returns MVCC info about a key. | | |
| | [`TIDB_MVCC_INFO()`](#tidb_mvcc_info) | Returns the MVCC (Multi-Version Concurrency Control) information about a key. | |
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| ## TIDB_MVCC_INFO | ||
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| Returns MVCC info for a key. The `TIDB_ENCODE_INDEX_KEY` function can be used to obtain a key. |
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| Returns MVCC info for a key. The `TIDB_ENCODE_INDEX_KEY` function can be used to obtain a key. | |
| Returns the MVCC (Multi-Version Concurrency Control) information for a key. You can use the [`TIDB_ENCODE_INDEX_KEY`](#TIDB_ENCODE_INDEX_KEY) function to obtain a key. |
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Same for this one, we could link to https://docs.pingcap.com/tidb/stable/glossary#multi-version-concurrency-control-mvcc
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Co-authored-by: xixirangrang <[email protected]>
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