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https://dev.mysql.com/doc/refman/8.0/en/json.html
MySQL also supports the JSON Merge Patch format defined in RFC 7396, using the JSON_MERGE_PATCH() function. See the description of this function, as well as Normalization, Merging, and Autowrapping of JSON Values, for examples and further ...The ...
https://dev.mysql.com/doc/refman/8.0/en/create-table.html
You can set the InnoDB MERGE_THRESHOLD value for an individual index using the index_option COMMENT clause. You can set the InnoDB MERGE_THRESHOLD value for a table using the table_option COMMENT clause. Setting the MERGE_THRESHOLD option in table ...| {FULLTEXT | SPATIAL} [INDEX | KEY] [index_name] (key_part,...) [index_option] ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-change-buffer.html
The buffered changes, which may result from INSERT, UPDATE, or DELETE operations (DML), are merged later when the pages are loaded into the buffer pool by other read operations. Merging cached changes at a later time, when affected pages are read ...
https://dev.mysql.com/doc/refman/8.0/en/faqs-innodb-change-buffer.html
For example: ------------------------------------- INSERT BUFFER AND ADAPTIVE HASH INDEX ------------------------------------- Ibuf: size 1, free list len 0, seg size 2, 0 merges Relevant data points include: size: The number of pages used within ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-nutshell.html
During recovery, InnoDB reads corruption flags from both locations and merges results before marking in-memory table and index objects as corrupt. Added a JSON merge function intended to conform to RFC 7396. JSON_MERGE_PATCH(), when used on 2 JSON ... This section summarizes what has been added to, deprecated in, and removed from MySQL ...
https://dev.mysql.com/doc/refman/8.0/en/view-updatability.html
Generally, the view references must be updatable, meaning that they may be merged and not materialized. It is sometimes possible for a multiple-table view to be updatable, assuming that it can be processed with the MERGE algorithm. SET s=s+1; ...
https://dev.mysql.com/doc/refman/8.0/en/explain-output.html
index_merge This join type indicates that the Index Merge optimization is used. By merging semijoins and antijoins, the optimizer can reorder tables in the execution plan more freely, in some cases resulting in a faster plan. For each row ... The ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-parameters.html
innodb_disable_sort_file_cache Command-Line Format --innodb-disable-sort-file-cache[={OFF|ON}] System Variable innodb_disable_sort_file_cache Scope Global Dynamic Yes SET_VAR Hint Applies No Type Boolean Default Value OFF Disables the operating ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-programs-ndb-restore.html
Different offset values can also be used for different columns of the same table, like this: $> ndb_restore --restore-data --remap-column=hr.employee.salary:offset:10000 \ --remap-column=hr.employee.hours:offset:-10 When source backups contain ...
https://dev.mysql.com/doc/refman/8.0/en/glossary.html
Starting with MySQL 5.5, the InnoDB Plugin is merged back into the MySQL code base as the built-in InnoDB storage engine (known as InnoDB 1.1). When the relevant index page is brought into the buffer pool while associated changes are still in the ...